DC Backup Block for S8TS S8T-DCBU-01 CSM_S8T-DCBU-01_DS_E_8_2 DC Backup Block for S8TS Prevents 24-VDC Outages Due to Power Interruptions or Failures • Supplies 24 VDC for a fixed period of time even during AC input outages to considerably improve system reliability. Block Power Supply Basic Block is connected using a Bus Line Connector to achieve a simple system configuration. Notification of alarms is provided by indications on the main unit and alarm signal output. RoHS-Compliant Block Power Supply Basic Block DC Backup Block For the most recent information on models that have been certified for Refer to Safety Precautions for All Power Supplies and Safety ! safety standards, refer to your OMRON website. Precautions on page 15. Ordering Information Note: For details on normal stock models, contact your nearest OMRON representative. ■ DC Backup Block (See note 1.) Input voltage Output voltage Output current Model number 24 to 28 VDC 24 V 3.7 A/8 A (See note 2.) S8T-DCBU-01 Note: 1. One S8T-BUS03 Connector is included as an accessory. 2. The output current can be selected by a switch. ■ Bus Line Connector Type Number of Connectors Model number DC Bus Line Connector 1 S8T-BUS03 10 (See note.) S8T-BUS13 Note: One package contains 10 S8T-BUS03 Connectors. ■ Basic Block Type Output voltage/Output current Model number Screw terminal type With Bus Line Connectors 24 V/2.5 A S8TS-06024-E1 Without Bus Line Connectors S8TS-06024 Connector terminal type With Bus Line Connectors S8TS-06024F-E1 Without Bus Line Connectors S8TS-06024F Note: Use S8T-DCBU-01 in a pair with the Block Power Supply Basic Block. ■ Battery Holder Model number S82Y-TS01 Note: Can be set two batteries. ■ Battery Model number S82Y-BAT01 S82Y-BAT02 Note: A set of two batteries. Designated battery varies on the number of multi-connected S8TS-06024@. @ and Designated Battery” on page 2. Refer to “Number of Multi-Connected S8TS-06024 1 S8T-DCBU-01 Basic Configuration S8TS-06024@ Block Power Supply Basic Block (Order separately) S8T-BUS03 Bus Line Connector Note: S8T-DCBU-01 shall be connected with S8TS-06024@ when in use. Note: One S8T-BUS03 Connector is included with the S8T-DCBU-01 DC Backup Block. Connect to AC Lines S8T-DCBU-01 DC Backup Block Connect to Batteries S8T-BUS01 Bus Line Connector (Order separately) Note: S8T-BUS01 Connector is used for connecting to the S8TS-06024@ Basic Block. Connect to Loads S82Y-TS01 Battery Holder (Order separately) 100 to 240 VAC 100 to 240 VAC Normal operation AC interrupted Charge Discharge Improve system reliability by 24 V 24 V 2.5 A 2.5 A using DC Backup Blocks. 24 V Monitor Monitor DC Designated external Designated external DC Backup battery battery Backup Block Block 24-VDC output ■ Number of Multi-Connected S8TS-06024@ and Designated Battery Area where battery is sold Japan Europe Areas other than Japan and Europe Overload Max. No. of S82Y-BAT01 S82Y-BAT02 LC- LC- LC- LC- protection connected R122R2PG R123R4PG R122R2P R123R4P operating S8TS-06024@ point selector units 5.7 A (typical) 2 (3 in the case of N+1 Yes Yes Yes Yes Yes Yes redundant operation) 11.7 A 4 (5 in the case of N+1 —— Yes —— Yes —— Yes (typical) redundant operation) Note: 1. Designated battery S82Y-BAT01 is a set of two LC-P122R2J batteries manufactured from Panasonic, and designated battery S82Y- BAT02 is a set of two LC-P123R4J batteries from Panasonic. 2. The designated battery is rated at 12 V. Use two batteries in series. 3. The LC-P122R2J or LC-P123R4J batteries from Panasonic can be purchased separately and be used. To order them separately, ask a sales representative. 2 S8T-DCBU-01 Specifications ■ Ratings/Characteristics Item Model S8T-DCBU-01 Input Voltage (See note 1.) 24 to 28 VDC Output Normal Voltage 24 VDC (See note 3.) (See operation Load variation influence (See note 6% max. note 2.) 4.) Backup Voltage 21.0 to 27.4 VDC (See note 5.) operation Min. output cur- S82Y-BAT01 0.11 A rent (See note 6.) S82Y-BAT02 0.17 A Backup time S82Y-BAT01 8 min/3.7 A (at 25°C, battery fully charged, start of battery service life) (reference value) S82Y-BAT02 4 min/8.0 A (at 25°C, battery fully charged, start of battery service life) (See note 7.) Charg- Method Stable voltage/current charging method ing Charging voltage (See note 8.) 27.4 V/26.2 V (typical) Max. charging current 0.35 A (typical) Overvoltage protection (See note 8.) Yes (30 V typical) Addi- Protection Overdischarge protection Yes (18.5 V typical) tional functions (See note 8.) func- Overload protection Yes (5.7 A/11.7 A typical) tions (See note 8.) Battery misconnection protection Yes (See note 8.) Input func- Backup ON/OFF input Yes tion (See note 8.) Output Output indicator Yes (color: green) functions Battery status indicator Yes (color: red) (See note 8.) Battery status output Yes (relay: 24 VDC, 0.1 A) (See note 8.) Backup status indicator Yes (color: red) Operation mode output Yes (relay: 24 VDC, 0.1 A) Other Ambient operating temperature Operating: Refer to the derating curve in Engineering Data. (with no condensation or icing) (See note 4.) Storage: −25 to 65°C Ambient humidity Operating: 25% to 85%; Storage: 25% to 90% Dielectric strength 3.0 kVAC for 1 minute (between all S8TS-06024@ AC inputs, and all S8T-DCBU-01 terminals/ (See notes 4 and 9.) all S8TS-06024@ outputs; detection current: 20 mA) 2.0 kVAC for 1 minute (between all S8TS-06024@ AC inputs and PE terminal; detection cur- rent: 20 mA) 1.0 kVAC for 1 minute (between all S8T-DCBU-01 terminals/all S8TS-06024@ outputs, and PE terminal; detection current: 20 mA) Insulation resistance (See note 4.) 100 MΩ min. (between all S8T-DCBU-01 terminals and all S8TS-06024@ outputs, and be- tween all S8TS-06024@ AC inputs and PE terminal) at 500 VDC Vibration resistance (See notes 4 and 10.) 10 to 55 Hz, 0.375-mm single amplitude for 2 h each in X, Y, and Z directions 2 Shock resistance (See notes 4 and 10.) 150 m/s , 3 times each in ±X, ±Y, and ±Z directions EMI (See Conducted Emission Conforms to EN61204-3 EN55011 Class A and based on FCC Class A note 4.) Radiated Emission Conforms to EN61204-3 EN55011 Class A EMS (See note 4.) Conforms to EN61204-3 High severity levels Approved UL: UL508 (Listing: Class 2: Per UL1310) (See note 11.), UL60950-1 standards cUL: CSA C22.2 No. 14 (Class 2: Per No.223) (See note 11.) cUR: No. 60950-1 EN/VDE EN50178 (=VDE0160), EN60950-1 (=VDE0805 Teil 1) Size 120 × 120 × 43 mm Weight 350 g Note: 1. Refer to Output Voltage Adjustment for S8TS-06024@ on page 6. 2. The output specifications are defined at power output terminals. 3. Specified by performance of S8TS-06024@ Basic Block. 4. Specified by S8TS-06024@ connection. 5. The output voltage will be 21.0 V (min.) when switching to backup operation. 6. The life of the battery will greatly reduced when operating below the minimum output. Design the loadcircuit so that at least the minimum output is maintained. 7. Refer to Backup Time (Reference Value) on page 12. 8. Refer to Functions on page 7 for details. 9. Set the detection current to 20 mA × N, where N is the number of S8TS-06024@ Basic Blocks connected. (Fig. 1) 10. Be sure to mount End Plates (PFP-M) on both ends of the Power Supply. 11. To ensure Class 2, take one of following measures. Note that the number of S8TS-06024@ to be connected to the S8T-DCBU-01 shall be one. LN S8TS- S8T- • Connect S8T-DCBU-01 to S82Y-TS01 having its fuse replaced with an UL-Listed and DC rated 06024� DCBU- 32 VDC min./3 A max. one. 01 -V+VConnect an UL-Listed and DC rated 32 VDC min./2.5 A max. fuse at the location shown in Fig.1. -V+V 3 S8T-DCBU-01 Connections ■ Block Diagram S8T-DCBU-01 BAT+ Bypass D Battery BAT− Discharge circuit Detection resistor +V Charging DC OUTPUT circuit Fuse −V 2.0 A Overdis- Overcurrent charge detection detection Operation Input Discharge voltage control X mode detection circuit output Battery voltage detection Battery Battery X status ON/OFF output input Connector for Connector for DC (+) Bus Line Bus Line Connector Connector DC (−) Operation Table 1: Usage with Possible Overcharge Due to Standby ■ Operating Procedures Current Battery not disconnected Battery Connection Extreme Backup shortening of incapacity Using the S82Y-TS01 Battery Holder is recommended for connecting battery life due to due to battery and installing the battery. If the S82Y-TS01 is used, connect a switch frequent backup overcharge and fuse between the battery and the S8T-DCBU-01. Refer to operations or and inability Battery Holder S82Y-TS01 on page 6 for details on how to select and insufficient to recharge install the switch and fuse. charging Turning OFF the AC power --- Possible Battery Overdischarge after assembly and installation (See note 7.) The battery will discharge according to the conditions given it items 1 Turning OFF the AC power --- Possible to 3, below. Battery overdischarge may result in backup incapacity during maintenance or due to extremely shortened service life and an inability to recharge. inspection Perform the following actions to prevent overdischarge. Fre- Turning OFF the AC Possible --- 1. Discharge Due to Load in Backup Operation (See note 1.) quently power during lunch Using the discharge protection function, rapid discharge is turning breaks (1 hour/day) prevented by the battery connection terminal voltage the AC Turning OFF the AC Possible --- automatically stopping backup operation at approximately 18.5 V. power power at night (16 The standby current of the product, however, may result in OFF hours/day) continued discharge and overdischarge if discharge is performed after backup operation has been stopped. Therefore, refer to item Turning OFF the AC Possible Possible 2. power on Saturdays and Sundays 2. Discharge Due to S8T-DCBU-01 Standby Current (See note 1.) The AC power will turn OFF due to the standby current generated Turning OFF the AC --- Possible in the circuit configuration, and discharge will continue even if the power during long load is no longer operating. In cases such as those described in vacations Table 1, disconnect the battery to prevent overdischarge. Storage or shipment --- Possible (1) Set the Battery Holder switch to OFF. (See notes 2 and 4.) Long-term power outage --- Possible Connect the external circuit shown in Figure 1 to protect against forgetting to change the switch. (See note 8.) Note: 1. The standby current of the S8T-DCBU-01 will cause the battery to discharge after backup operation has stopped because of the discharge (2) Open the backup ON/OFF input using an external signal and protection function or the backup ON/OFF input is opened. disconnect the battery using an external relay. (See Figure 1 2. Before turning ON the AC power, turn OFF the Battery Holder switch or and notes 2, 4, and 8.) switch SW shown in Figure 2. Unnecessary backup operation will shorten the service life of the battery because of the two reasons listed below. Also, be sure to turn ON the Battery Holder switch or switch SW shown in Figure 2 when turning ON the AC power. 4 Battery misconnection protection circuit S8T-DCBU-01 A period of 24 to 48 hours is required to fully charge the battery. If backup Figure 1 Overdischarge Protection Circuit When the User Forgets to Turn operation is performed before the battery is fully charged, the reduced OFF the Battery Holder Switch charge will result in shortened battery service life. S82Y-TS01 (Battery Holder)The battery service life will be shortened with each repetition of charging and discharging. 3. If the battery connection terminal voltage is 15.5 V (typical) or lower, the X incorrect battery connection protection function will be activated, and 1 2 charging will not be performed. When the battery is nearing the end of its service life (i.e., when the battery capacity is half its initial capacity), L N − + recharging and backup may not be possible if only the battery has been S8TS 3 4 left turned AC power OFF for about two days (at an ambient temperature -06024@ of 25°C). Refer to Incorrect Battery Connection Protection on page 8. 4. Do not use the S8T-DCBU-01 in locations subject to corrosive gases, such 5 6 as silicon gas, sulfuric gas, organic gas, or chlorine gas. If relays (X in Figure 1 and Figure 2) or switches (Battery Holder and switch SW in Figure 2) are used or left in atmospheres with corrosive gas, corroded contact surfaces may cause contact instability or contact failure and 7 X 8 render battery backup or backup operation impossible. 5. The ambient operating temperature and humidity for the LY1-D (24 VDC) are given in the following table. The LY1-D (24 VDC) has a built-in diode LY1-D (24 VDC) S8T-DCBU-01 to absorb inverted voltage that is generated from the operating coil. The −V −V +V operating coil therefore has polarity. Take this into account when performing wiring. Refer to individual datasheets for details. Model Ambient operating temperature Ambient Specified relay (X): OMRON LY1-D (24 VDC) X operating (See note 5 on page 5.) humidity LOAD LY1-D Output current of 4 A max.: −25 to 55°C 5% to 85% (24 VDC) Output current of 4 A min.: −25 to 40°C The following will occur is you forget to turn OFF the Battery Holder switch. 6. A voltage of approximately 15 V is applied to switch SW in Figure 2 when it is open and a current of approx. 2 mA when it is shorted. Take this into a. Backup operation will start after the AC power has been turned account when selecting a switch. OFF. 7. The standby current will flow and discharging will continue if only the battery is wired and left without wiring the AC power. b. When the battery connection terminal voltage reaches 18.5 V 8. If the user has forgotten to turn OFF the Battery Holder switch in Figure 1 (typical), backup operation will stop, the relay contacts will or switch SW in Figure 2, backup operation will continue until the battery connection terminal voltage reaches 18.5 V (typical), and then the battery open, and the battery will be disconnected from the DC Backup will be disconnected by the relay (X). If the battery is left in this condition Block. for a period exceeding the times given in the following table, self-discharge will cause the battery to continue overdischarging, which may result in the inability to recharge and perform backup. Figure 2 Overdischarge Protection Circuit Using an External Signal S82Y-BAT01 S82Y-TS01 (Battery Holder) Ambient Load Estimated months battery can be left X temperature current until incapable of recharging Start of battery life End of battery life L N − + 20°C 0.11 A 1.0 0.5 S8TS-06024@ 2.2 A 2.0 1.0 40°C 0.11 A 0.5 0.25 SW (See note 6.) 2.2 A 1.0 0.5 (Backup ON/OFF input) S82Y-BAT02 S8T-DCBU-01 Ambient Load Estimated months battery can be left −V +V −V temperature current until incapable of recharging Start of battery life End of battery life 20°C 0.17 A 1.0 0.5 Specified relay (X): OMRON LY1-D (24 VDC) X (See note 5 on page 5.) 4.8 A 3.0 1.5 40°C 0.17 A 0.5 0.25 LOAD 4.8 A 3.0 1.5 a. The backup ON/OFF input is opened (making backup impossible) by the external signal (e.g., a switch). b. If the AC power has been tuned OFF, 24 VDC will turn OFF, the contacts will open, and the DC Backup Block will be disconnected. 3. Battery Discharge Due to Self-discharging Even if the S8T-DCBU-01 Battery is disconnected, it will discharge naturally. To prevent overdischarge, charge the Battery completely before storing it for an extended period of time or shipping it, and then charge it at the interval given below. Ambient temperature Months between charging 20°C or less 9 20 to 30°C6 30 to 40°C3 5 +V +V S8T-DCBU-01 Backup Function Output Voltage Adjustment for S8TS-06024@ S8T-DCBU-01 detects output voltage drop of S8TS-06024@ to switch to backup operation. The DC Backup Block detects a drop in the output voltage (approx. 23 VDC) of the connected S8TS-06024@ to switch to backup Indicator Operation mode operation. output relay The output voltage of the S8TS-06024@ can be adjusted using the 1 Backup output voltage adjuster. Do not, however, set the output voltage to lower than the factory shipment setting, if the S8TS-06024@ is used COM 2 connected with a DC Backup Block. Normal 3 LED lit Relay (OPN MODE) Wiring Length between S8T-DCBU-01 (DC ON: Green) (1)-(2): ON LED lit and Battery (BACKUP: Red) Connect S8T-DCBU-01 and the battery using a cable having a wire Backup operation continues for about 7 seconds even after the diameter specified in Recommended Wire Diameter on page 16 output voltage of S8TS-06024@ is restored. within a wiring length of 1.5 m. Backup status LED Relay Because the battery voltage is monitored at the battery connecting (BACKUP: (OPN MODE) terminal, a large wiring impedance increases the voltage drop from Red) wiring, reducing the backup time. Power failure Continuous Lit Backup backup (1)-(2): ON Failure During Battery Holder S82Y-TS01 operation of one operation unit of of one unit We recommend using the S82Y-TS01 Battery Holder for connecting S8TS- of S8TS- and installing the battery. Take the following points into consideration 06024@ 06024@ when using the S82Y-TS01: During Repetition of Blink at an Repetition of operation switching interval of switching (1) Contact between leaking battery fluid and metal parts having an of multiple between about 7 between Normal electric potential may cause ignition or fire. To prevent this, the units of Normal seconds ((3)-(2): ON) Battery Holder uses a resin battery tray. Install the Battery Holder S8TS- operation and and BACK UP in the direction shown in the following figure. 06024@ Backup ((1)-(2): ON) at Upon activation of operation at an an interval of overload protection interval of about about function of S8TS- 7 seconds 7 seconds. 06024@ (See note.) Note: (1) If this state occurs, the S8TS-06024@ may be overloaded or malfunctioning. Immediately eliminate the cause of the trouble. (2) If switching between backup operation and normal operation is repeated, (2) The inrush current shown below flows when backup operation is the output voltage changes accordingly. switched to. The peak value and time of this inrush current vary (3) The contact capacity of the relay is 24 VDC 0.1 A. according to the capacity of the input capacitor of the connected (4) Do not use the S8TS-06024@ with sudden load fluctuations or load peaks exceeding the rated current. Doing so will cause the output voltage of the equipment, battery charge status, battery wiring length, and S8TS-06024@ to drop and backup to be performed, and may shorten the ambient temperature. The switch and fuse of the S82Y-TS01 are battery service life. selected taking this inrush current into consideration. When (5) The maximum inrush current specified below flows when backup operation starts. replacing the fuse, use only the specified fuse. (Littelfuse, 0287015* (15 A)) 45 * The previously specified 257015 has been discontinued. Battery charge status: Fully charged Battery ambient temperature: 40°C 45 Input capacitor of connected equipment: 56,000 µF Load power: 192 W Battery charge status: Fully charged Battery ambient temperature: 40°C Input capacitor of connected equipment: 56,000 µF 0 Load power: 192 W 25 ms Time 0 25 ms Charging Circuit Time (3) In the event that the battery generates inflammable gases, place the switch and fuse away from the convection path of the inflam- Charging Time (Reference Values) mable gas to prevent the switch or fuse from causing ignition and explosion. Battery used 100% charged 80% charged (4) If the S8T-DCBU-01 is stored with the AC power tuned OFF but LC-@122R2@@ 24 to 48 hours 5 hours the battery still connected, the standby current of the S8T-DCBU- LC-@123R4@@ 8 hours 0 may cause the battery to discharge, considerably reduce the service life of the battery, and render recharging and backup Note: The battery takes the time specified above to be charged. impossible. To prevent this, turn OFF the switch. (Refer to Bat- If power is interrupted for shorter than the necessary charging tery Overdischarge on page 4.) time (i.e., power failure immediately after installation or repeated short power failures), backup operation may not continue for the necessary time. 6 Inrush current (A) Inrush current (A) S8T-DCBU-01 Inserting and Removing the Bus Line Indicator Operation mode Battery status output relay output relay Connector Backup 1 LOW 4 Pay attention to the following points to maintain electric characteristics. COM 2 COM 5 Normal 3 OK 6 Do not insert/remove the Connectors more than 20 times. Do not touch the Connector terminals. LED lit Relay (OPN MODE) Relay (BAT LOW) (DC ON: Green) (3)-(2): ON (6)-(5): ON To remove the Connectors, insert a flat-bladed screwdriver alternately at both ends. 4. Turn OFF the AC power of the S8TS-06024@. 5. Confirm that backup operation is correctly performed as shown below. Indicator Operation mode Battery status output relay output relay Backup 1 LOW 4 2 5 COM COM 3 6 Normal OK LED lit Relay (OPN MODE) Relay (BAT LOW) S8T-BUS03 (DC ON: Green) (1)-(2): ON (6)-(5): ON LED lit (BACKUP: Red) Use the S8T-BUS03, which connects only the DC lines. (AC line not 6. Turn ON the AC power of the S8TS-06024@. connected). Note: 1. Check operation after arranging a state where no fault occurs even if the S8T-BUS03 is equipped with a selector to prevent incorrect connected devices are turned OFF in the midway. connection to a power supply unit with a different output voltage 2. The operation mode may not changed to Backup, if AC power is turned OFF within 10 sec. at Step 3. specification. Slide the selector to the 24 V position. 3. After checking operation, follow the points listed in Battery Overdischarge on page 4 if the AC power is tuned OFF or the equipment is stored or S8TS-06024@ S8T-BUS03 shipped. L N GR − + ■ Functions Charging voltage selector Overcurrent protection Selector operating point selector Terminal block cover Section A S8T-DCBU-01 −V+V −V +V Charging Voltage Selector Mounting Select either 27.4 V or 26.2 V at the Enlarged View of charging voltage selector to select the Section A charging voltage. Mounting Direction The shipment setting is 27.4 V. Standard mounting Yes Because the battery manufacturer Face-up mounting No recommends 27.4 V as charging voltage, it is recommended to charge at 27.4 V. Other mounting No In this case, 27.4 VDC, which is the Use standard mounting only. Improper mounting will interfere with charging voltage of the batteries, may heat dissipation and may result in deterioration or damage to internal output depending on the state of parts. Charging voltage selector connected load when the operation mode changes to Backup. Standard mounting Face-up mounting Note: If the battery is charged at 26.2 V, the battery capacity Correct Incorrect decreases each time the battery is charged, and the backup time gradually decreases. The values shown below are for reference only. Capacity reduction in each charge-and-discharge cycle At 25°C Reduction by 10% At 0°C Reduction by 20% Operation Check After connecting the S8TS-06024@ and S8T-DCBU-01, it is recommended to use the following procedure to check whether the DC Backup Block is operating correctly. 1. Turn ON the Battery Holder. 2. Turn ON the AC power of the S8TS-06024@. 3. Wait for at least 10 s, and then check if the DC Backup Block is in the following status. 7 S8T-DCBU-01 Overvoltage Protection Circuit Backup ON/OFF Input Function If the charging voltage is about 30 V or above, the charging voltage is If the backup ON/OFF input terminals are short-circuited, backup is cut off to prevent the battery from being overcharged. enabled, while if the terminals are open, backup is disabled. The terminal is non-voltage input type and the short and open circuits are specified below. How to Reset Overvoltage Protection Short Impedance: 1 kΩ or below Reset Overvoltage protection with following steps after arranging a Flowing current at 0 Ω: About 2 mA state where no fault occurs even if the connected devices are turned Residual voltage: 1 V or below off in the midway. Open Impedance: 400 kΩ or more 1. Turn OFF the Battery Holder. 2. Turn OFF the AC power of the S8TS-06024@. With the shipment setting, a short bar is installed to short-circuit 3. Leave the power OFF for 1 minute or more. across the backup ON/OFF input terminals. 4. Turn ON the Battery Holder. When the backup ON/OFF input terminals are open, the following 5. Turn ON the AC power of the S8TS-06024@ again. signs inform that backup is disabled. Note: 1. Do not turn ON the input power again until the cause of the overvoltage LED (Battery status indicator/BAT LOW: Red) is lit. has been removed. 2. As an AC input OFF status is the same as a power failure, the S8T-DCBU-Relay (Battery status output/BAT LOW) is in the LOW mode ((4)- 01 will perform backup operation. Sometimes backup operation cannot be (5): ON). performed for the required backup time as the battery is not sufficiently charged. For this reason, first make sure that backup operation is not Note: The standby current of the S8T-DCBU-01 will cause needed before turning the battery holder OFF and then the AC input overdischarge to continue even after backup operation has power OFF. 3. The time required for reset is specified for connection of five units of stopped. Do not leave the S8T-DCBU-01 for extended periods S8TS-06024@, without a load, and fully charged batteries. in this condition. (Refer to Battery Overdischarge on page 4.) Overload Protection Operating Point Incorrect Battery Connection Selector Protection 5.7 A (typical) or 11.7 A (typical) can be Enlarged View of When the DC Backup Block is turned ON, the charging circuit is selected with the selector as an overload Section A separated if battery connection terminal voltage becomes below protection operating point during backup about 15.5 V. This function protects the battery and the main body operation. Select 5.7 A (typical) for one or upon incorrect connection of the batteries (with reverse polarity or two units of S8TS-06024@ (or three units with only one 12 V battery). during N+1 redundancy operation), or If an incorrect battery connection is detected, notification will be select 11.7 A (typical) for three or four units provided the following ways. (or five units during N+1 redundancy operation). The shipment setting is 5.7 A LED (Battery status indicator/BAT LOW: Red) is lit. (typical). Relay (Battery status output/BAT LOW) is in the LOW mode ((4)- (5): ON). Overload protection Note: (1) After the battery has been properly connected, the battery status display and output operating point selector will not respond even if the battery is disconnected (Battery Holder switch set to OFF, Battery Holder fuse blown, battery connection wiring disconnected) with the AC power turned ON. Overload Protection Function (2)Do not replace the battery while power is being supplied. If the battery is replaced while power is being supplied, the incorrect battery connection protection will not operate even if the battery is connected with the polarity reversed. The S8T-DCBU- During Normal Operation 01 will be damaged and the Battery Holder fuse will blow. Notification of an overload status is provided in the following way. Battery Status Indication and Battery LED (BAT LOW: Red) lights up. Relay (BAT LOW) is in the LOW mode ((4)-(5): ON). Status Output If power failure occurs in this state, an overload protection function is Notification of a battery charging/discharging fault (1. through 4. activated to fail to backup. described below) is provided in the following way. During Backup Operation Indicator Battery status The overload protection operating point can be selected from either output relay 5.7 A (typical) or 11.7 A (typical) using the overload protection function selector. The output is cut off when overload protection is 4 LOW activated. COM 5 Note: Continuation of operation in the overload status may cause 6 OK deterioration or damage to internal parts. LED lit Relay (BAT LOW) (BAT LOW: Red) (4)-(5): ON Overdischarge Protection Function If power failure occurs in this state, backup operation does not start or the backup time becomes shorter. Remove the cause of the fault When the battery connecting terminal voltage drops down to about immediately. 18.5 V, backup operation is automatically stopped to protect the battery against overdischarge. 1. The battery connection terminal voltage is approx. 22.5 V or lower. (BAT LOW will be cleared when the voltage reaches or Note: 1. The standby current of the S8T-DCBU-01 will cause overdischarge to continue even after backup operation has stopped. Do not leave the S8T- exceeds approx. 24.5 V.) (See note 1.) DCBU-01 for extended periods in this condition. (Refer to Battery 2. The incorrect battery connection protection detected an incorrect Overdischarge on page 4.) 2. The residual capacity of the battery is zero when the battery voltage is connection. 18.5 V (typical). 3. The battery ON/OFF input terminals are open. 4. An overload status exists during normal operation. Note: 1. BAT LOW being cleared does not mean that battery charging has been completed. 2. The contact capacity of the relay is 24 VDC 0.1 A. 8 S8T-DCBU-01 Periodic Inspection of the Battery ■ Battery Replacement We recommend periodically inspecting the battery as follows: Sealed lead-acid batteries have a limited service life. Fire may be caused in the worst case if the batteries are usedCheck the battery voltage. (In a 27.4 V series connection, make beyond their time for replacement. Replace batteries periodically to sure that each battery is charged to 13.7 V.) avoid the worst case by referring to the following replacement proce- Check battery wiring and connections. (Check the batteries and dure. S8T-DCBU-01 connections for loose screws.) Note: 1. Battery deterioration accelerates when its service life limit draws near. Make sure that backup operation is performed normally in a 2. The battery replacement timing assumes the battery has reached half its simulated power failure state. original capacity. 3. The life varies according to the storage and operating environment, output Note: Check the backup operation after making sure that no wattage, and the frequency of backup operation. problems will occur as a result of stopping the power supply. 4. Follow procedures specified by voluntary or regulatory regulations when disposing of or recycling batteries. 5. Do not replace the battery while power is being supplied. If the battery is replaced while power is being supplied, the incorrect battery connection protection will not operate even if the battery is connected with the polarity reversed. The S8T-DCBU-01 will be damaged and the Battery Holder fuse will blow. 1. Replacement Guideline Replace the battery using the following table as a guideline: Battery Ambient Life of battery Approximate temperature replacement interval LC-R122R2@@ 20 °C 2 to 3 years 2 years LC-R123R4@@ 30 °C 1 to 1.5 years 1 years 40 °C 0.5 to 0.75 years 0.5 year LC-P122R2@@ 20 °C 4 to 6 years 4 years LC-P123R4@@ 30 °C 2 to 3 years 2 years 40 °C 1 to 2 years 1 year Note: The conditions in the table above is estimated as: charged at 27.4 V, discharged with 8 A (for LC-@123R4@@), 3.7 A (LC- @122R2@@), backup operation once a month bases. 2. Measuring Backup Time The backup time can be measured by the procedure below. If the battery is new, first measure the initial backup time value. Replace the battery if backup operation is not performed for the required backup time during periodic maintenance or the backup time has fallen below the half or less of initial value. Note: 1. Make sure that at least 48 hours have elapsed since the previous backup operation, and that the battery is correctly connected, and then measure the backup time. 2. Measure the backup time after making sure that no problems will occur as a result of stopping the power supply. (1) Turn the AC power OFF and back up the S8T-DCBU-01. (2) Measure the time that the battery status output relay turns to LOW ((4)-(5): ON) after the operation mode output relay is backed up ((1)-(2): ON). (This is the backup time.) (3) When the battery status output relay turns LOW ((4)-(5): ON), turn the AC power ON. AC input Output voltage of the S8TS-06024@ Output voltage of the S8T-DCBU-01 22.5 V (typical) Battery connection terminal voltage Backup ((1)-(2)) Operation mode output Normal ((3)-(2)) LOW ((4)-(5)) Battery status output OK ((6)-(5)) Backup time 9 S8T-DCBU-01 Installation DC Backup Block S8T-DCBU-01 121314 15 1 Backup 2 COM 1 3 Operation mode output Normal 2 (OPN MODE) 3 4 Battery status output 5 (BAT LOW) LOW 4 6 5 COM Backup ON/OFF input 7 16 8 (ON/OFF) 6 OK 9 10 11 21 20 1817 19 15 23 24 22 (1) Backup: Operation mode output relay (9) Output indicator (DC ON: Green) (17) DC output terminal (−V) (2) COM: Operation mode output relay (10) Backup status indicator (BUCKUP: Red) (18) NC (3) Normal: Operation mode output relay (11) Battery status indicator (BAT LOW: Red) (19) DC output terminal (+V) (4) LOW: Battery status output relay (12) Battery connector terminal (−) (20) Rail stopper (5) COM: Battery status output relay (13) NC (21) Bus line connector (6) OK: Battery status output relay (14) Battery connector terminal (+) (22) Terminal block cover (7) ON/OFF: Backup ON/OFF input (15) Slider (23) Charging voltage selector (8) GND: Backup ON/OFF input (16) Short bar (24) Overload protection function selector Bus Line Connector Battery Holder S8T-BUS03 S82Y-TS01 6 5 7 1 1 3 2 3 2 4 4 5 (1) Selector (1) Battery Tray (2) Ground Terminal (2) Fuse (3) NC (3) Terminal Block (4) DC Bus Line Connector Terminal (+) (4) Switch (5) DC Bus Line Connector Terminal (−) (5) Battery A (Order separately) (6) Battery B (Order separately) (7) Protection Cover 10 S8T-DCBU-01 Engineering Data ■ Derating Curve Number of S8TS-06024@ units S8TS-06024@ rated input Derating curve Rated output power 1 200 to 240 VAC *1 36 W 100 to 120 VAC *2 1 (+1) 100 to 120 VAC/200 to 240 VAC *3 30 W 2 *4 88.8 W 2 (+1) *5 76.8 W 3 *6 146.4 W 3 (+1) *7 128.4 W 4 *8 192 W 4 (+1) *9 168 W Note: 1. “(+1)” indicates redundant operation. 2. If there is derating problem, use forced air cooling. 3. The ambient temperature is specified at a location 50 mm downward from the main body of the DC Backup Block. 4. The ambient operating temperature range of the battery is 0 to 40°C; it is different from that of S8T-DCBU-01. And the ambient temperature of battery is specified with the temperature at the battery surface. 5. The amount of output wattage at multi-connected S8TS-06024@ become smaller than the simple sum of each wattage, since S8T-DCBU- 01 consumes energy from S8TS-06024@. S8T-DCBU-01 S8T-DCBU-01 S8T-DCBU-01 160 40 100 36 146.4 *6 88.8 140 35 *2 128.4 80 *4 76.8 120 30 100 25 60 *7 80 20 *5 40 60 15 *3 40 10 20 20 5 *1 0 0 0 −20 −10 0 1020304050 60 −20 −10 0 1020304050 60 −20 −10 0 1020304050 60 Ambient temperature (°C) Ambient temperature (°C) Ambient temperature (°C) S8T-DCBU-01 200 192 *8 168 150 *9 100 50 0 −20 −10 0 1020304050 60 Ambient temperature (°C) 11 Output power (W) Output power (W) Output power (W) Output power (W) S8T-DCBU-01 ■ Time Charts Startup Power Failure (When the Battery Voltage does not Reach the BAT LOW AC input Voltage) Output voltage of the S8TS-06024@ Power failure time AC input Output voltage of the S8T-DCBU-01 Output voltage of the Battery connection S8TS-06024@ terminal voltage 7 seconds (typical) (See note.) Output voltage of the Backup S8T-DCBU-01 ((1)-(2)) Operation mode output Battery connection Normal terminal voltage ((3)-(2)) Backup LOW ((1)-(2)) ((4)-(5)) Operation Battery 7 seconds (typical) (See note.) mode output status output Normal OK ((3)-(2)) ((6)-(5)) Note: Backup operation is not possible during the period (7 seconds (typical)) that the bat- LOW tery status output relay is LOW after the S8T-DCBU-01 is started up. ((4)-(5)) Battery status output OK ((6)-(5)) Note: Backup operation is continued for seven seconds (typical) after the power is restored from a power failure. Power Failure (When the Battery Power Failure (When the Battery Voltage Reaches the BAT LOW Voltage) Voltage Reaches the Overdischarge Power failure time Protection Voltage) AC input AC input Output voltage of the S8TS-06024@ Output voltage of the S8TS-06024@ Output voltage of the S8T-DCBU-01 22.5 V (typical) (See note 1.) Output voltage of the Battery connection S8T-DCBU-01 terminal voltage 22.5 V (typical) (See note.) 18.5 V (typical) (See note.) Battery connection terminal voltage Backup ((1)-(2)) Operation 7 seconds (typical) (See note 2.) Backup mode output ((1)-(2)) Normal Operation ((3)-(2)) mode output Normal ((3)-(2)) LOW ((4)-(5)) Battery LOW status output ((4)-(5)) OK Battery ((6)-(5)) status output Note: 1. When the battery voltage falls below 22.5 V (typical), the status of the OK battery status output relay changes to LOW. ((6)-(5)) 2. Backup operation is continued for seven seconds (typical) after the power Note: When the battery voltage falls below 22.5 V (typical), the status of the battery status is restored from a power failure. output relay changes to LOW. Backup operation is stopped when the battery voltage falls below 18.5 V (typical). If the battery is left with backup operation stopped, the standby current of the S8T-DCBU-01 may cause the battery to continue discharging, considerably reduce the service life of the battery, and render recharging and backup impossible. To prevent this, refer to Battery Overdischarge on page 4. ■ Backup Time (Reference Value) Backup Time when Backup Time when LC-@122R2@@ is Used LC-@123R4@@ is Used 80 80 70 70 60 60 50 50 40 40 Note: 1. Backup time conditions Backup time: Time from start of backup until output voltage reaches 21.0 V. 30 30 Ambient temperature: 25°C Battery: New product fully charged to 20 20 27.4 V Length of wire between S8T-DCBU-01 and battery: 1.5 m 10 10 2. The backup time changes depending on the capacity of connected equipment, 0 0 ambient temperature, and battery service 0 50 100 150 200 0255075 100 life. Output capacity (W) Output capacity (W) 12 Backup time (min) Backup time (min) S8T-DCBU-01 Dimensions Note: All units are in millimeters unless otherwise indicated. DC Backup Block S8T-DCBU-01 (20) 10 Slider 2.5 Six, M4 120±1 Square Washers Screw 100 35 80.7 120±1 10 116 Rail Stopper 43±1 5.6 5 (Sliding: 15 max.) Bus Line Connector S8T-BUS03 8.6 2 24 10 7.6 5.5 5 Sliding 13 70 5.5 2 Sliding 2.5 18 4 35 Battery Holder 222.25 S82Y-TS01 52.75 212 Two, 8 dia. 8 185.7 114 82 13 S8T-DCBU-01 ■ DIN Rail (Order Separately) Note: All units are in millimeters unless otherwise indicated. Mounting Rail (Material: Aluminum) 7.3±0.15 PFP-100N 4.5 PFP-50N ±0.3 ±0.15 35 27 15 25 25 25 25 15(5) * 1 10 10 1,000 (500) * * Values in parentheses are for the PFP-50N. Mounting Rail (Material: Aluminum) 16 PFP-100N2 4.5 35±0.3 27 24 29.2 15 25 25 25 25 15 1 1.5 10 10 1,000 End Plate 10 PFP-M 6.2 1.8 M4 × 8 pan-head screw 1 50 35.5 35.3 1.8 11.5 10 1.3 M4 spring 4.8 washer 14 S8T-DCBU-01 Safety Precautions Refer to Safety Precautions for All Power Supplies. Install and ship the Battery Holder in the specified !WARNING direction. Installing or shipping the Battery Holder in a non- specified direction may cause the battery fluid to leak. Application Protection against battery liquid leaking will not be Do not use the Product in applications in which there is a possible, and the battery may produce smoke or may possibility of loss of life or bodily harm, such as with ignite. medical devices, or other devices that may significantly The battery may deteriorate quickly and cause fire. affect the public or society. (Operating temperature range of a battery: 0 to 40°C) Do not operate the battery in an area exceeding 40°C. !CAUTION Do not use the Product in locations subject to corrosive gases. If the Product is used or left in atmospheres with corrosive Application gas, the corroded contact surfaces of the switches or relays may cause contact instability or contact failure and render This Product is intended for short-term backup in battery recharging or backup operation impossible. In the applications for which AC power is constantly supplied. worst case, corrosive gas entering the battery may cause fire. Follow the procedure described in Battery Overdischarge on page 4 if the AC power is turned OFF or the power Smoke and fire may be caused. Do not use new and old, failure lasts for a number of hours. The service life of the different types, and different residual capacities of battery will be considerably reduced, which may render batteries mixed. recharging and backup impossible. Internal parts may be deteriorated or damaged if the Product Battery Overdischarge is used for applications with frequent inrush current at the load end. Do not use the Product for such applications. Follow the procedure described in Battery Overdischarge on page 4 to prevent battery overdischarge. If the battery Operation is overdischarged, service life of the battery will be considerably reduced, which may render recharging and backup impossible. A battery could be dangerous if it is used incorrectly. Follow the precautions of a battery when using. Installation and Environment The battery may generate flammable gases when it is Minor burns may occur due to high temperatures. Do not charged, so that fire or explosion may be caused. Do not touch the Product while power is being supplied or use the battery in a tight area or near an object that immediately after power is turned OFF. generates sparks, such as contactors, relays, or static charge. Electric shock may be caused. Do not add or separate the DC Backup Block during power-on. Loose screws may cause fire. Tighten the terminal screws with torque of 1.08 N·m and tighten the connector screw If the equipment must be stopped in an emergency, turn and threaded flange with torque 0.20 N·m. OFF the AC power and disconnect the battery. If only the AC power is turned OFF, power will be supplied from the Loose screws may result in fire. The tightening torque for battery and the connected equipment will continue to terminal screws on the Battery Holder is 0.74 N·m. operate. This may result in damage to equipment or injury. Electric shock may be caused. Do not remove any Fire may be caused if the fully drained battery is kept in connector covers from a connector unless using Bus line use. Replace the battery immediately if it is fully drained. connectors. When connecting the Basic Block and DC Backup Block, If malodor, abnormal noise, smoke, or fluid is issued from lock the slider and rail stopper. If they are locked the battery, turn off the switch of the Battery Holder. insufficiently, linkage may be disconnected due to Continuation of operation in this state may cause fire. vibration, causing electric shock. Battery fluid may cause loss of sight or burn injuries. Do not Insufficient charge, overdischarge, or faulty operation of touch any fluid leaking from the battery. If the fluid comes into overload protection during backup operation switching will contact with your eyes or skin, immediately flush the area considerably reduce the service life of the battery, which thoroughly with clean water and get medical attention. may render backup impossible. Do not connect a load or Shocks or vibrations may cause battery performance to capacitor between the S8T-DCBU-01 and the battery. deteriorate. Do not use the Battery Holder in locations If a battery other than the designated ones is used, ignition subject to shocks or vibrations. and fire may be caused. Do not use batteries other than the designated ones. Maintenance Cracks will generate in the battery to cause leakage of electrolyte. Do not apply resin including a migrational Electric shock may be caused. Do not disassemble the plasticizer on the battery. Product or touch internal parts during power-on. A short circuit may cause heat or spark, possibly causing When performing maintenance, disconnect the battery a damage to battery, fire or explosion. before turning OFF the AC power. (Refer to Battery When using metallic tools to install the battery to the Overdischarge on page 4.) If only the AC power is turned Battery Holder, use one insulated with vinyl tape or the like. OFF, power will be supplied from the battery and the connected equipment will continue to operate. Wrong connection may cause smoke or fire. Connect the A dropping battery may cause injuries and burns caused battery correctly. by leaking electrolyte. Do not drop the battery during installation of the battery or Battery Holder or replacement of the battery. 15 S8T-DCBU-01 Recommended Wire Diameter Sparks generated when the battery is connected may cause explosion or fire. Do not install or replace the battery Overload protection Number of connected Recommended wire in the presence of flammable gases. operating point selector S8TS-06024@ diameter 5.7 A (typical) 1, 2 AWG 14 to 18 Diluted sulfuric acid may leak, possibly causing loss of (cross-sectional area: 2 0.823 to 2.081 mm ) sight or burns. Do not disassemble or remodel the battery. 3 AWG 14 to 16 (cross-sectional area: 2 1.309 to 2.081 mm ) Electric shock, fire or burns may be caused. Do not short- circuit the battery using a metallic matter. 11.7 A (typical) 3, 4, 5 AWG 14 (cross-sectional area: 2 2.081 mm ) Explosion may be caused if a battery is thrown in fire. Observe self-imposed controls, laws and regulations for disposal or collection (recycle) of a battery. Installation Environment Do not use the Product in locations subject to shocks or vibrations. In ■ Precautions for Safe Use particular, install the Product as far away as possible from contactors or other devices that are a vibration source. Be sure to mount End Plates (PFP-M) on both ends of the S8T-DCBU-01. Mounting Install the S8T-DCBU-01 well away from any sources of strong, high- frequency noise and surge. Ensure sufficient heat dissipation when installing the S8T-DCBU-01 to increase its long-term reliability. Natural cooling is used for the S8T-DCBU-01, so mount it so that there is airflow around it. Ambient Operating and Storage S8TS-06024@ S8TS-06024@ Environment *1 *1 *2 Do not use or store the Product in the following locations. Doing so may result in product failure, incorrect operation, or deterioration. Usage in locations subject to direct sunlight S8T -DCBU-01Usage in locations with an ambient temperature outside the derat- ing curve range *3 *1 *1 Usage in locations with relative humidity outside 25% to 85% or *4 condensation from rapid temperature change *3. 75 mm min. *1. Convection of air Storage in locations with a ambient temperature outside −25 to *2. 75 mm min. *4. 10 mm min. 65°C or relative humidity outside 25% to 90% When cutting out holes for mounting, make sure that cuttings do not Usage in locations where liquid, foreign matter, corrosive gas, or enter the interior of the products. combustible gas may enter the product Be sure to remove the sheet covering the Power Supply for Follow the battery instructions regarding using the Battery Holder machining before turning ON the power so that it does not interfere with the battery mounted and the storage environment. with heat dissipation. When storing the battery for an extended period of time, observe the Connect the S8T-DCBU-01 to the right or left end of S8TS-06024@ following two precautions. Basic Blocks. Turn OFF the battery switch. The standby current of the S8T- DCBU-01 will cause discharging to continue. Correct Correct Incorrect Charge the battery at intervals specified by the manufacturer of the S8T-DCBU-01 S8T-DCBU-01 S8T-DCBU-01 battery. Self-discharging during storage will cause battery to continue discharging. LN LN LN LN LN S8TS- S8TS- S8T- S8T- S8TS- S8TS- S8TS- S8T- S8TS- Handling of Bus Line Connector 06024@ 06024@ DCBU- DCBU- 06024@ 06024@ 06024@ DCBU- 06024@ 01 01 01 Do not drop or give strong impact on the Bus line connector. DIN Rail Mounting To mount the Block on a DIN rail, hook portion (A) of the Block onto the rail and press the Block in direction (B). Wiring During installation, make sure that the discharge voltage selector and the overload protection function selector are set correctly. (A) Minor fire may occur. Ensure that input and output terminals are wired correctly. Connect the ground completely. Electric shock or malfunction may occur if the ground is not connected completely. (B) Do not apply more than 100-N force to the terminal block and To dismount the Block, pull down portion (C) with a flat-blade screw- connector terminal when tightening it. driver and pull out the Block. Close the terminal cover to avoid short circuit of terminals with a foreign object. Use the following material to wire to load and to the batteries for preventing wiring material from smoke or fire caused by the abnormal load. 30 mm min. (C) Rail stopper 16 S8T-DCBU-01 Troubleshooting This page lists the errors that may occur when the S8T-DCBU-01 is used, along with their probable causes and remedies. Check the relevant item. When Probable cause Description Remedies Installation S8T-DCBU-01 cannot be The Bus Line Connector is provided with a Set the selector on the Bus Line Connector connected. selector for preventing misconnection of 5 V (provided) to 24 V. and 12 V specification of S8TS units. For this Refer to S8T-BUS03 on page 7 for details. reason, connection is not successful if different specification units are installed. When checking The S8T-DCBU-01 output The S8T-DCBU-01 operates by the output of Connect the S8T-DCBU-01 to S8TS-06024@ the performances indicator does not light in the S8TS-06024@. A probable cause is that the using the Bus Line Connector (provided). Refer to operation check procedure, Bus Line Connector is not connected as the Refer to Basic Configuration on page 2 for Operation Check step 2. input voltage is connected by the Bus Line details. on page 7 for Connector (provided). details. The connected S8TS- A probable cause is that the S8T-DCBU-01 is The S8T-BUS03 Bus Line Connector for 06024@ does not operate in connected between S8TS-06024@ Basic connecting the S8T-DCBU-01 is not connected operation check procedure, Blocks. to the AC power line. Connect the S8T-DCBU- step 2. 01 to the left or right end of S8TS-06024@ Basic Blocks. The battery status indicator A probable cause is that the battery was Connect the battery correctly. is lit even 10 seconds or connected with the + and − polarities reversed. Refer to Incorrect Battery Connection more after the power is Protection on page 8 for details. turned ON in operation A probable cause is that the battery voltage falls Check the battery connection terminal voltage. check procedure, step 3. below about 22.5 V. (Battery self-discharging or If it is 18.5 V or lower, replace the battery. the standby current of the S8T-DCBU-01 may Subsequently, follow the procedure described have caused discharging to continue.) in Battery Overdischarge on page 4. A probable cause is that the backup ON/OFF Short the backup ON/OFF input. (At shipment, input is open. the backup ON/OFF input is shorted.) Refer to Backup ON/OFF Input Function on page 8 for details. A probable cause is that the overload protection As energy is consumed by S8T-DCBU-01, the has been triggered in the connected S8TS- total output capacity of the number of 06024@. connected S8TS-06024@s cannot be obtained. Connect one more S8TS-06024@ Basic Block. Refer to the Derating Curve on page 11 for details. A probable cause is that the overload protection When three or more S8TS-06024@ Basic function selector switch on the S8T-DCBU-01 is Blocks are connected, set the overload set low. protection function selector to 11.7 A (typical). (The default setting is 5.7 A (typical).) Refer to Overload Protection Operating Point Selector on page 8 for details. A probable cause is that the output voltage The S8T-DCBU-01 detects drops in the output adjuster (V. ADJ) of the connected S8TS- voltage of the S8TS-06024@ and switches over 06024@ is set lower than the factory-set to backup operation. Adjust the output voltage voltage. adjuster (V. ADJ) on the S8TS-06024@ so that the output in a no-load state is 24.5 V or more. Refer to Output Voltage Adjustment for S8TS- 06024@ on page 6 for details. The backup operation is not A probable cause is that inrush current during Select a fuse taking the inrush current when performed in operation backup operation caused the fuse on the backup operation is switched to into check procedure, step 5. battery to blow. consideration. The recommended S82Y-TS01 Battery Holder is selected taking this inrush current into consideration. Refer to Battery Holder S82Y-TS01 on page 6 for details. When S8T-DCBU- The backup state is not A probable cause is that a protection function Cancel the protection functions on the S8TS- 01 is used returned to normal even on the S8TS-06024@ was activated to stop 06024@. (Turn OFF the power of S8TS-06024@ after the power is restored S8TS-06024@ operation. Basic Block, and after at least one minute turn from a power failure. ON the input voltage again.) Output was cut during A probable cause is that the overdischarge If a remedy is required during backup operation, backup operation. protection function was activated by a battery allow backup to finish until the battery status voltage dropping due to discharge. indicator is lit. A probable cause is that an overload state is Provide sufficient margin for the load capacity reached due to load fluctuations during backup when using the S8T-DCBU-01. operation. Backup operation and A probable cause is that one of the S8TS- Replace the out-of-order S8TS-06024@. normal operation are 06024@s is out of order when two or more Refer to Backup Function on page 6 for details. alternately repeated. S8TS-06024@s are connected. A probable cause is that the S8TS-06024@ is in Provide sufficient margin for the load capacity an overload state due to load fluctuations when using the S8T-DCBU-01. during normal operation. The battery status indicator A probable cause is that discharging continued Replace the battery. remains lit when a period of while the AC was turned OFF because of Subsequently, follow the procedure described 24 hours has passed after battery self-discharging or standby current of in Battery Overdischarge on page 4. power has been applied. the S8T-DCBU-01. 17 S8T-DCBU-01 When Probable cause Description Remedies When inspecting Backup time is too short. A probable cause is that backup operation was Replace the battery. batteries performed frequently (e.g., turning OFF the AC Subsequently, follow the procedure described power at night or on days off). in Battery Overdischarge on page 4. A probable cause is that the battery has We recommend periodically replacing the reached the end of its service life. battery. Refer to Battery Replacement on page 9 for details. A probable cause is that the S8T-DCBU-01 was Replace the battery. stored for a long time with the battery Subsequently, follow the procedure described connected. in Battery Overdischarge on page 4. A probable cause is that battery characteristics Check the backup time in the operating caused the backup time to shorten in low environment before use. temperatures. The voltages of the two A probable cause is a battery abnormality. Replace both batteries. batteries used in series are considerably different. ALL DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters into inches, multiply by 0.03937. To convert grams into ounces, multiply by 0.03527. In the interest of product improvement, specifications are subject to change without notice. 18 Terms and Conditions Agreement Read and understand this catalog. Please read and understand this catalog before purchasing the products. Please consult your OMRON representative if you have any questions or comments. Warranties. (a) Exclusive Warranty. Omron’s exclusive warranty is that the Products will be free from defects in materials and workmanship for a period of twelve months from the date of sale by Omron (or such other period expressed in writing by Omron). Omron disclaims all other warranties, express or implied. (b) Limitations. OMRON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCTS. BUYER ACKNOWLEDGES THAT IT ALONE HAS DETERMINED THAT THE PRODUCTS WILL SUITABLY MEET THE REQUIREMENTS OF THEIR INTENDED USE. Omron further disclaims all warranties and responsibility of any type for claims or expenses based on infringement by the Products or otherwise of any intellectual property right. (c) Buyer Remedy. Omron’s sole obligation hereunder shall be, at Omron’s election, to (i) replace (in the form originally shipped with Buyer responsible for labor charges for removal or replacement thereof) the non-complying Product, (ii) repair the non-complying Product, or (iii) repay or credit Buyer an amount equal to the purchase price of the non-complying Product; provided that in no event shall Omron be responsible for warranty, repair, indemnity or any other claims or expenses regarding the Products unless Omron’s analysis confirms that the Products were properly handled, stored, installed and maintained and not subject to contamination, abuse, misuse or inappropriate modification. Return of any Products by Buyer must be approved in writing by Omron before shipment. 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Omron Companies shall not be responsible for conformity with any standards, codes or regulations which apply to the combination of the Product in the Buyer’s application or use of the Product. At Buyer’s request, Omron will provide applicable third party certification documents identifying ratings and limitations of use which apply to the Product. This information by itself is not sufficient for a complete determination of the suitability of the Product in combination with the end product, machine, system, or other application or use. Buyer shall be solely responsible for determining appropriateness of the particular Product with respect to Buyer’s application, product or system. Buyer shall take application responsibility in all cases. NEVER USE THE PRODUCT FOR AN APPLICATION INVOLVING SERIOUS RISK TO LIFE OR PROPERTY OR IN LARGE QUANTITIES WITHOUT ENSURING THAT THE SYSTEM AS A WHOLE HAS BEEN DESIGNED TO ADDRESS THE RISKS, AND THAT THE OMRON PRODUCT(S) IS PROPERLY RATED AND INSTALLED FOR THE INTENDED USE WITHIN THE OVERALL EQUIPMENT OR SYSTEM. Programmable Products. Omron Companies shall not be responsible for the user’s programming of a programmable Product, or any consequence thereof. Performance Data. Data presented in Omron Company websites, catalogs and other materials is provided as a guide for the user in determining suitability and does not constitute a warranty. It may represent the result of Omron’s test conditions, and the user must correlate it to actual application requirements. Actual performance is subject to the Omron’s Warranty and Limitations of Liability. Change in Specifications. Product specifications and accessories may be changed at any time based on improvements and other reasons. It is our practice to change part numbers when published ratings or features are changed, or when significant construction changes are made. However, some specifications of the Product may be changed without any notice. When in doubt, special part numbers may be assigned to fix or establish key specifications for your application. Please consult with your Omron’s representative at any time to confirm actual specifications of purchased Product. Errors and Omissions. Information presented by Omron Companies has been checked and is believed to be accurate; however, no responsibility is assumed for clerical, typographical or proofreading errors or omissions. 2016.8 In the interest of product improvement, specifications are subject to change without notice. OMRON Corporation Industrial Automation Company http://www.ia.omron.com/ (c)Copyright OMRON Corporation 2016 All Right Reserved.