GE Critical Power Data Sheet GE CAR2548DC SERIES 2500 Watt Front End Power Supply Power Supply Measures: 14.25 x 4.00 x 1.65”” CAR2548DC series dc-dc converter Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Features  3 front panel LEDs: 1-input;2-output; 3 - fault  Output programmable from 43.2 – 56Vdc  Remote ON/OFF control of the 48Vdc output  Remote sense (up to 0.25V) on the 48Vdc output  No minimum load requirements  Redundant parallel operation  Active load sharing (single wire)  Efficiency: typically 91%  Standby orderable either as 3.3Vdc or 5Vdc Applications  Auto recoverable OC & OT protection  48Vdc distributed power architectures  Operating temperature: -10 - 70C (de-rated above 50C)  Cellular Base Stations 2  Digital status & control: I C and PMBus serial bus  Satellite Hubs nd  EN/IEC/UL60950-1 2 edition; UL, CSA and VDE  Network Equipment  EMI: class B FCC docket 20780 part 15, EN55022  Network Attached Storage  Meets EN6100 immunity and transient standards  Telecom Access Nodes  Shock & vibration: NEBS GR-63-CORE, level 3  Routers/Switches/ATE Equipment Description The CAR2548DC series of DC-DC Converters provide highly efficient isolated power from DC input mains in a 3 compact 1U industry standard form factor in an unprecedented power density of 27W/in . These converters complement the CAR2548FP rectifier providing comprehensive solutions for systems connected either to commercial ac mains, 48/60Vdc power plants or telecom central offices. This plug and play approach offers significant advantages since systems can be reconfigured and repositioned readily by simply replacing the power supply. The high-density, front-to-back airflow is designed for minimal space utilization and is highly expandable for future 2 growth. The industry standard PMBus compliant I C communications buss offers a full range of control and monitoring capabilities. The SMBusAlert signal pin alerts customers automatically of any state change within the power supply. * UL is a registered trademark of Underwriters Laboratories, Inc. † CSA is a registered trademark of Canadian Standards Association. ‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V. § Intended for integration into end-user equipment. All the required procedures for CE marking of end-user equipment should be followed. (The CE mark is placed on selected products.) ** ISO is a registered trademark of the International Organization of Standards. + PMBus name and logo are registered trademarks of the System Management Interface Forum (SMIF) Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om December 6, 2013 ©2013 General Electric Company. All rights reserved. Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability. Parameter Symbol Min Max Unit Input Voltage: Continuous V 0 75 V IN ac 1 Operating Ambient Temperature TA -10 70 °C Storage Temperature Tstg -40 85 °C I/O Isolation voltage (100% factory Hi-Pot tested) 1500 VDC Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, load, and temperature conditions. INPUT Parameter Symbol Min Typ Max Unit Operational Range -36 -48/60 -75 48Vdc output turned OFF V -36 V IN DC 48Vdc output turned ON -42 -45 -48 Idling Power, 48Vdc output OFF 35 W W 48Vdc output ON 45 Maximum Input Current (V = 37.5Vdc, V = V , I =I ) I 75 A IN O O, set O O, max IN DC Cold Start Inrush Current (Excluding x-caps, 25C, <10ms, I 75 A IN PEAK per ETSI 300-132) Efficiency (Tamb=25C, Vin= -48Vdc, Vout= 48Vdc); 100% load 90 91 % 30 – 50% load  87 20% load 2 Holdup time (V = -48Vdc, V = 48V , T 25C, I =I ) T 4 ms in out dc amb O O, max Loss of Output Early Warning Signal T 1 ms Isolation; Input/Output 1500 VDC V Input/Frame 1500 DC Output/Frame 1000 V DC Input capacitance F 25 µf 48V MAIN OUTPUT DC Parameter Symbol Min Typ Max Unit Output power P 0 2500 W OUT Set point, @ 50% load 47.5 48.00 48.5 VDC Overall regulation (load, temperature, aging) -2 +2 % Linear droop, NL to FL V 0.1 V OUT DC Remote sense (sum of hot & return) 0.25 VDC 3 Ripple and noise 500 mV p-p 1 Derated above 50C at 2.5%/C 2 Full load w/5,000µf external output capacitance, Output may droop down to 44Vdc. 3 Measured across a 10µf tantalum and a 0.1µf ceramic capacitors in parallel. 20MHz bandwidth Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 2 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” 48VDC MAIN OUTPUT (continued) Parameter Symbol Min Typ Max Unit Turn-ON overshoot V 3 % OUT Turn-ON delay 2 sec Remote ON/OFF delay time T 40 ms Turn-ON rise time (10 – 90% of VOUT) 50 ms Transient response 50% step [10%-60%, 50% - 100%] -2 +2 VDC (dI/dt – 1A/µs, recovery 300µs) Programmable range (hardware & software) V 43.2 56 V OUT DC 4 Overvoltage protection, latched 58 59 60 VDC (recover by cycling OFF/ON via hardware or software) Output current, V = 48V I 0 52 A out dc OUT DC Power limit, Vout = 48 to 56Vdc POUT 2500 W Current limit, Hiccup (programmable level) 105 130 % of FL Active current share I -5 +5 % of FL OUT 5 External capacitance 0 5,000 µf STANDBY OUTPUT Parameter Symbol Min Typ Max Unit Set point Vout 3.3 / 5.0 Vdc Overall regulation (load, temperature, aging) Vout -5 +5 % Ripple and noise 50 mVp-p Output current I 0 1 A out dc General Specifications Parameter Min Typ Max Units Notes Reliability, at 25C 250,000 Full load, ; MTBF per SR232 Reliability protection Hrs for electronic equipment, method I, case III, 100,000 50C Service Life 10 Yrs Full load, excluding fans Weight Kgs/ (Lbs) Feature Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See Feature Descriptions for additional information. Parameter Symbol Min Typ Max Unit Remote ON/OFF (Needs to be pulled HI via an external resistor) Logic High (Module ON) IIH  20 µA V 0.7V  12 V IH DD DC Logic Low (Module OFF) I 1 mA IL   V 0  0.8 V IL DC 4 The power supply will attempt three restarts prior to latching the shutdown level. 5 4,000µf electrolytic and 1,000µf tantalum capacitors Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 3 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Feature Specifications (continued) Parameter Symbol Min Typ Max Unit Output Voltage programming (Vprog) Equation: Vout = 10.8 + (Vprog * 0.96) Vprog range V 0  2.5 V prog DC Programmed output voltage range Vo 10.8  13.2 VDC Voltage adjustment resolution (8-bit A/D) Vo 10 mV   DC Output configured to 13.2Vdc Vprog 2.5 3.0 VDC Output configured to the 12Vdc set-point V 3.0   V prog DC Enable [short pin controlling presence of the 12VDC output] 12V output OFF VI 0.7VDD  12 VDC 12V output ON VI 0  0.4 V DC Write protect (Wp) Write protect enabled VI 0.7VDD  12 VDC Write protect disabled V 0 0.8 V I  DC INPUT-OK (Needs to be pulled HI via an external resistor) Logic High (Input within normal range) I 20 µA OH  VOH 0.7VDD  12 VDC Logic Low (Input out of range) I   20 mA OL VOL 0  0.4 VDC DC-OK ( Internally connected to 3.3V via a 10kΩ resistor) Logic High (Output voltage is present) IOH  20 µA V 0.7V  12 V OH DD DC Logic Low (Output voltage is not present) I 20 mA OL   VOL 0  0.4 VDC Over Temperature Warning (Needs to be pulled HI via an external it ) Logic High (temperature within normal range) I 20 µA OH  VOH 0.7VDD  12 VDC Logic Low (temperature is too high) IOL   20 mA V 0 0.4 V OL  DC Delayed shutdown after Logic Low transition Tdelay 10 sec Fault (Needs to be pulled HI via an external resistor) Logic High (No fault is present) I 20 µA OH  VOH 0.7VDD  12 VDC Logic Low (Fault is present) IOL   20 mA VOL 0  0.4 VDC PS Present (Needs to be pulled HI via an external resistor) Logic High (Power supply is not plugged in) IIL   4 mA Logic Low (Power supply is present) VIL 0  0.1 VDC Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 4 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Feature Specifications (continued) Parameter Symbol Min Typ Max Unit SMBAlert# (Interrupt) (Needs to be pulled HI via an external it ) Logic High (No Alert - normal) I 20 µA OH  VOH 0.7VDD  12 VDC Logic Low (Alert is set) I 20 mA OL   V 0 0.4 V OL  DC Output current monitor (Imon) Resolution 100 mV/A Accuracy -5 5 % of FL Measurement range I 0 52 A o DC Analog output range Vmon 0 5.2 VDC Sourced output current 5 mA DC Digital Interface Specifications Parameter Conditions Symbol Min Typ Max Unit PMBus Signal Interface Characteristics Input Logic High Voltage (CLK, DATA) VIH 2.1 3.6 VDC Input Logic Low Voltage (CLK, DATA) VIL 0 0.8 V DC Input high sourced current (CLK, DATA) I 0 10 μA IH Output Low sink Voltage (CLK, DATA, SMBALERT#) IOUT=3.5mA VOL 0.4 VDC Output Low sink current (CLK, DATA, SMBALERT#) IOL 3.5 mA Output High open drain leakage current V=3.6V I 0 10 μA OUT OH (CLK,DATA, SMBALERT#) PMBus Operating frequency range Slave Mode FPMB 10 400 kHz Measurement System Characteristics Clock stretching tSTRETCH 25 ms I measurement range I 0 52 A OUT Linear RNG DC IOUT measurement accuracy 25°C IACC -3 +3 % of FL VOUT measurement range Linear VOUT(rng) 0 60 VDC VOUT measurement accuracy V -3 +3 % OUT(acc) Temp measurement range Linear Temp(rng) 0 120 C 6 Temp measurement accuracy Temp(acc) -5 +5 C I measurement range I 0 80 A IN Linear IN(rng) DC I measurement accuracy IN IIN(acc) -5 +5 % VIN measurement range Linear VIN(rng) 0 80 VDC VIN measurement accuracy V -3 +3 % IN(acc) PIN measurement range Linear PN(rng) 0 3000 W PIN measurement accuracy PIN(acc) -5 +5 % Fan Speed measurement range Linear 0 30k RPM Fan Speed measurement accuracy -5 5 % Fan speed control range -direct- 0 100 % 6 Temperature accuracy reduces non-linearly with decreasing temperature Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 5 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Environmental Specifications Parameter Min Typ Max Units Notes 7 Ambient Temperature -10 70 °C Derated above 50C Storage Temperature -40 85 °C Operating Altitude 2250/7382 m/ft Non-operating Altitude 8200/30k m / ft Power Derating with Temperature 2.5 %/°C 50C to 70C Power Derating with Altitude 2.0 Above 2250 m/7382 ft C/301 m C/1000 ft Acoustic noise 55 dbA 25C, half load Over Temperature Protection 110/95 °C Shutdown / restart Humidity Operating 30 95 % Relative humidity, non-condensing Storage 10 95 Shock and Vibration acceleration NEBS GR-63-CORE, Level 3, 20 - 6 Grms 2000Hz, min 30 minutes Earthquake Rating NEBS GR-63-CORE, all floors, Seismic 4 Zone Zone 4 Designed and tested to meet NEBS specifications. EMC Compliance Parameter Criteria Standard Level Test 8 Conducted emissions EN55022, FCC Docket 20780 part 15, A 0.15 – 30MHz subpart J DC input 9 Radiated emissions EN55022 A 30 – 10000MHz Voltage dips EN61000-4-11 B -30%, 10ms B -60%, 100ms B -100%, 5sec DC INPUT Voltage surge EN61000-4-5, level 4 A 4kV, 1.2/50µs, common mode immunity A 2kV, 1.2/50µs, differential mode Fast transients EN61000-4-4, level 3 B 5/50ns, 2kV (common mode) Conducted RF fields EN61000-4-6, level 3 A 130dBµV, 0.15-80MHz, 80% AM Enclosure Radiated RF fields EN61000-4-3, level 3 A 10V/m, 80-1000MHz, 80% AM immunity ENV50140 A ESD EN61000-4-2, level 3 B 6kV contact, 8kV air 7 Designed to start at an ambient down to -40°C; meet spec after  30 min warm up period, may not meet operational limits below -10°C. 8 Class B EMI conducted and radiated levels met with an external filter. Please contact sales for a recommended filter. 9 Radiated emissions compliance is contingent upon the final system configuration. Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 6 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES 2500 Watt Front End Power Supply Power Supply CAR2548DC series dc-dc converters Measures: 14.25 x 4.00 x 1.65”” Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Input_OK: A TTL compatible status signal representing Control and Status whether the input voltage is within the anticipated range. This signal needs to be pulled HI externally through a resistor. Control hierarchy: Some features, such as output voltage, can be controlled both through hardware and firmware. For DC_OK: A TTL compatible status signal representing whether example, the output voltage is controlled both by the signal pin the output voltage is present. This signal needs to be pulled HI (Vprog) and the PMBus command, (Vout_command) . externally through a resistor. Using output voltage as an example; the Vprog signal pin has Over_temp_warning: A TTL compatible status signal ultimate control of the output voltage until the Vprog is either > representing whether an over temperature exists. This signal 3Vdc or a no connect. When the programming signal via Vprog needs to be pulled HI externally through a resistor. is either a no connect or > 3Vdc, it is ignored, the output If an over temperature should occur, this signal would pull LO voltage is set at its nominal 12Vdc and the unit output voltage approximately 10 seconds prior to shutting down the power can be controlled via the PMBus command, (Vout_command). supply. The unit would restart if internal temperatures recover Analog controls: Details of analog controls are provided in within normal operational levels. At that time the signal reverts this data sheet under Signal Definitions. back to its open collector (HI) state. Common ground: All signals and outputs are referenced to Fault: A TTL compatible status signal representing whether a Output return. These include ‘Vstb return’ and ‘Signal return’. Fault occurred. This signal needs to be pulled HI externally through a resistor. Control Signals This signal activates for OTP, OVP, OCP, INPUT fault or No Voltage programming (Vprog): An analog voltage on this output. signal can vary the output voltage from 43.2Vdc to 56Vdc. The equation of this signal is: PS_Present: This pin is connected to ‘output return’ within the power supply. Its intent is to indicate to the system that a Vout = 42.67 + (Vprog * 5.33) where Vprog = 0.1 to 2.5V power supply is present. This signal may need to be pulled HI externally through a resistor. For Vprog > 2.5V the output reverts back to 48Vdc. Interrupt (SMBAlert): A TTL compatible status signal, Load share (Ishare): This is a single wire analog signal that is representing the SMBusAlert# feature of the PMBus compatible generated and acted upon automatically by power supplies 2 i connected in parallel. The Ishare pins should be tied together C protocol in the power supply. This signal needs to be pulled for power supplies if active current share among the power HI externally through a resistor. supplies is desired. No resistors or capacitors should get Serial Bus Communications connected to this pin. The I²C interface facilitates the monitoring and control of Able to current share with CAR2548FP rectifiers. various operating parameters within the unit and transmits Remote_ON/OFF: Controls presence of the 48Vdc output these on demand over an industry standard I²C Serial bus. voltage. This is an open collector, TTL level control signal that All signals are referenced to ‘Signal Return’. needs to be pulled HI externally through a resistor. Device addressing: The microcontroller (MCU) and the EEPROM A turn OFF command either through this signal (Remote have the following addresses: ON/OFF) or firmware commanded would turn OFF the 48V output. Device Address Address Bit Assignments (Most to Least Significant) Enable: This is a short signal pin that controls the presence of MCU 0xBx 1 0 1 1 A2 A1 A0 R/W the 48Vdc main output. This pin should be connected to Broadcast 0x00 0 0 0 0 0 0 0 0 ‘output return’ on the system side of the output connector. The EEPROM 0xAx 1 0 1 0 A2 A1 A0 R/W purpose of this pin is to ensure that the output turns ON after engagement of the power blades and turns OFF prior to disengagement of the power blades. The Global Broadcast instruction executes a simultaneous write instruction to all power supplies. A read instruction Write protect (WP): This signal protects the contents of the cannot be accessed globally. The three programmable address EEPROM from accidental over writing. When left open the 2 bits are the same for all I C accessible devices within the EEPROM is write protected. A LO (TTL compatible) permits power supply. writing to the EEPROM. This signal is pulled HI internally by the power supply. Address lines (A2, A1, A0): These signal pins allow up to eight (8) modules to be addressed on a single I²C bus. The pins are Status signals pulled HI internal to the power supply. For a logic LO these pins should be connected to ‘Output Return’ Output current monitor (Imon): A voltage level proportional to the delivered output current is present on this pin. The signal Serial Clock (SCL): The clock pulses on this line are generated level is 0.1V per amp ± 0.25V. by the host that initiates communications across the I²C Serial bus. This signal is pulled up internally to 3.3V by a 10kΩ resistor. The end user should add additional pull up resistance as necessary to ensure that rise and fall time timing and the Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 7 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” maximum sink current is in compliance to the I²C PEC is a CRC-8 error-checking byte, based on the polynomial 8 2 specifications. C(x) = x + x + x + 1, in compliance with PMBus™ requirements. The calculation is based in all message bytes, Serial Data (SDA): This line is a bi-directional data line. . This including the originating write address and command bytes signal is pulled up internally to 3.3V by a 10kΩ resistor. The end preceding read instructions. The PEC is appended to the user should add additional pull up resistance as necessary to message by the device that supplied the last byte. ensure that rise and fall time timing and the maximum sink SMBAlert#: The µC driven SMBAlert# signal informs the current is in compliance to the I²C specifications. ‘master/host’ controller that either a STATE or ALARM change Digital Feature Descriptions has occurred. Normally this signal is HI. The signal will change to its LO level if the power supply has changed states and the PMBus™ compliance: The power supply is fully compliant to signal will be latched LO until the power supply either receives the Power Management Bus (PMBus™) rev1.2 requirements. a ‘clear’ instruction as outlined below or executes a READ Manufacturer specific commands located between addresses STATUS_WORD. If the alarm state is still present after the 0xD0 to 0xEF provide instructions that either do not exist in the STATUS registers were reset, then the signal will revert back general PMBus specification or make the communication into its LO state again and will latch until a subsequent reset interface simpler and more efficient. signal is received from the host controller. Master/Slave: The ‘host controller’ is always the MASTER. The signal will be triggered for any state change, including the Power supplies are always SLAVES. SLAVES cannot initiate following conditions; communications or toggle the Clock. SLAVES also must  VIN under or over voltage respond expeditiously at the command of the MASTER as  Vout under or over voltage required by the clock pulses generated by the MASTER.  IOUT over current Clock stretching: The ‘slave’ µController inside the power  Over Temperature warning or fault supply may initiate clock stretching if it is busy and it desires to  Fan Failure delay the initiation of any further communications. During the  Communication error clock stretch the ‘slave’ may keep the clock LO until it is ready  PEC error to receive further instructions from the host controller. The maximum clock stretch interval is 25ms.  Invalid command  Detected internal faults The host controller needs to recognize this clock stretching, The power supply will clear the SMBusAlert# signal (release the and refrain from issuing the next clock signal, until the clock signal to its HI state) upon the following events: line is released, or it needs to delay the next clock pulse beyond the clock stretch interval of the power supply.  Receiving a CLEAR_FAULTS command  The main output recycled (turned OFF and then ON) via Note that clock stretching can only be performed after th completion of transmission of the 9 ACK bit, the exception the ENABLE signal pin being the START command.  The main output recycled (turned OFF and then ON) by the OPERATION command  Execution of a READ of the STATUS_WORD register Global broadcast: This is a powerful command because it can instruct all power supplies to respond simultaneously in one command. But it does have a serious disadvantage. Only a single power supply needs to pull down the ninth acknowledge bit. To be certain that each power supply responded to the global instruction, a READ instruction should be executed to Clock each power supply to verify that the command properly executed. The GLOBAL BROADCAST command should only be Stretch Figure 1. Example waveforms showing clock stretching. executed for write instructions to slave devices. I²C Bus Lock-Up detection: The device will abort any Read back delay: The power supply issues the SMBAlert # transaction and drop off the bus if it detects the bus being held notification as soon as the first state change occurred. During low for more than 35ms. an event a number of different states can be transitioned to before the final event occurs. If a read back is implemented Communications speed: Both 100kHz and 400kHz clock rates rapidly by the host a successive SMBAlert# could be triggered are supported. The power supplies default to the 100kHz clock by the transitioning state of the power supply. In order to avoid rate. The minimum clock speed specified by SMBus is 10 kHz. successive SMBAlert# s and read back and also to avoid Packet Error Checking (PEC): Although the power supply will reading a transitioning state, it is prudent to wait more than 2 respond to commands with or without the trailing PEC, it is seconds after the receipt of an SMBAlert# before executing a highly recommended that PEC be used in all communications. read back. This delay will ensure that only the final state of the The integrity of communications is compromised if packet power supply is captured. error correction is not employed. There are many functional Successive read backs: Successive read backs to the power features, including turning OFF the main output, that should supply should not be attempted at intervals faster than every require validation to ensure that the correct command is one second. This time interval is sufficient for the internal executed. Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 8 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” processors to update their data base so that successive reads Block read format: provide fresh data. 1 7 1 1 8 1 TM PMBus Commands S Slave address Wr A Command Code A Standard instruction: Up to two bytes of data may follow an 1 7 1 1 Sr Slave Address Rd A instruction depending on the required data content. Analog data is always transmitted as LSB followed by MSB. PEC is 8 1 8 1 8 1 optional and includes the address and data fields. Byte count = N A Data 1 A Data 2 A 1 8 1 8 1 8 1 8 1 8 1 1 S Slave address Wr A Command Code A ………. A Data 48 A PEC NoAck P 8 1 8 1 8 1 1 Low data byte A High data byte A PEC A P Linear Data Format The definition is identical to Part II of the Master to Slave Slave to Master PMBus Specification. All standard PMBus values, with the SMBUS annotations; S – Start , Wr – Write, Sr – re-Start, Rd – exception of output voltage related functions, are represented Read, by the linear format described below. Output voltage functions A – Acknowledge, NA – not-acknowledged, P – Stop are represented by a 16 bit mantissa. Output voltage has a E=9 constant exponent. Standard READ: Up to two bytes of data may follow a READ request depending on the required data content. Analog data The Linear Data Format is a two byte value with an 11-bit, is always transmitted as LSB followed by MSB. PEC is two’s complement mantissa and a 5-bit, two’s complement mandatory and includes the address and data fields. PEC is exponent or scaling factor, its format is shown below. optional and includes the address and data fields. Data Byte High Data Byte Low Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 1 7 1 1 8 1 Exponent (E) Mantissa (M) S Slave address Wr A Command Code A The relationship between the Mantissa, Exponent, and Actual Value (V) is given by the following equation: 1 7 1 1 8 1 Sr Slave Address Rd A LSB A E VM2 8 1 8 1 1 Where: V is the value, M is the 11-bit, two’s omplement MSB A PEC No-ack P mantissa, E is the 5-bit, two’s complement exponent Block communications: When writing or reading more than TM PMBus Command set: two bytes of data at a time BLOCK instructions for WRITE and Hex Data READ commands must be used instead of the Standard Command Code Byte Function Instructions Error! Reference source not found. write any Operation 01 1 Output ON/OFF number of bytes greater than two. ON_OFF_config 02 1 09, output ON default Clear_faults 03 0 Clear Status Block write format: Write_protect 10 1 Write control 1 7 1 1 8 1 Store_default_all 11 0 Store permanently S Slave address Wr A Command Code A Restore_default_all 12 0 Reset defaults 8 1 8 1 8 1 Capability 19 1 30h, 400kHz, SMBAlert Byte count = N A Data 1 A Data 2 A Vout_mode 20 1 Vout constants Vout_command 21 2 Set Vout 8 1 8 1 8 1 1 Vout_OV_fault_limit 40 2 Set OV fault limit ………. A Data 48 A PEC A P Vout_OV_fault_response 41 1 Vout_OV_warn_limit 42 2 Set OV warn limit Vout_UV_warn_limit 43 2 Set UV warn limit Vout_UV_fault_limit 44 2 Vout_UV_fault_response 45 1 Iout_OC_fault_limit 46 2 Iout_OC_fault_response Latch or hiccup 47 1 Set OC warn limit Iout_OC_warn_limit 4A 2 OT_fault_limit 4F 2 Latch or hiccup OT_fault_response 50 1 Set OT warn limit OT_warn_limit 51 2 UT_warn_limit 52 2 UT_fault_limit 53 2 UT_fault_response 54 1 Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 9 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Hex Data Command Code Field Function Vin_OV_fault_limit 55 2 Status Register Bit Allocation: Set OV warn limit Vin_OV_warn_limit 57 2 Register Code Bit Function Vin_UV_warn_limit 58 2 Set UV warn limit 7 Busy Vin_UV_fault_limit 59 2 Set UV shutdown 6 DC_ OFF Status_byte 78 1 5 Output OV Fault detected Status_word 79 2 4 Output OC Fault detected Status_Vout 7A 1 3 Input UV Fault detected Status_Byte 78 Status_Iout 7B 1 2 Temperature Fault/warning Status_input 7C 1 detected Status_temperature 7D 1 1 CML (communication fault) Status_CML 7E 1 detected Status_other 7F 1 0 None of Below Status_mfr_specific 80 1 7 OV Fault/Warning detected 6 OC Fault/Warning detected Status_fan_1_2 81 1 5 Input Fault/Warning detected Read_Vout 8B 2 Read output voltage 4 Mfr_specific register change Read_Iout 8C 2 Read output current Status_word detected Read_temperature 8D 2 Read Temperature 79 (includes Status_byte) 3 DC_OFF Read_Pout 96 2 2 Fan Fault or Warning PMBus revision 98 1 detected Mfr_ID 99 5 FRU_ID 1 Other fault 0 Unknown Mfr_model 9A 15 7 Vout OV Fault Mfr_revision 9B 4 6 Vout OV Warning Mfr_location 9C 4 5 Vout UV Warning Mfr_date 9D 6 4 Vout UV Fault Status_Vout 7A Mfr_serial 9E 15 3 N/A Mfr_Vin_min A0 2 36V (linear format) 2 N/A Mfr_Vin_max A1 2 75V (linear format) 1 N/A Mfr_Iin_max A2 2 27A (linear format) 0 N/A Mfr_Pin_max A3 2 950W (linear format) 7 IOUT OC Fault Mfr_Vout_min A4 2 10V (linear format) 6 N/A Mfr_Vout_max A5 2 15V (linear format) 5 IOUT OC Warning Mfr_Iout_max A6 2 71A (linear format) 4 N/A Status_Iout 7B Mfr_Pout_max A7 2 850W (linear format) 3 N/A Mfr_Tambient_max A8 2 70C (linear format) 2 N/A Mfr_Tambient_min A9 2 -10C (linear format) 1 N/A User memory space User_data_00 B0 48 0 N/A User memory space User_data_01 B1 48 7 Vin OV Fault 6 Vin OV Warning FRW_revision D0 1 5 Vin UV Warning 2 Ilimit set (1/100A) Ilimit_control_IC D3 2 4 Vin UV Fault 2 Vout set (1/512V) Vout_control_ IC D4 2 Status_input 7C 3 N/A Duty_cycle in % Fan_duty_cycle D6 1 2 N/A Control in duty cycle Fan_speed D7 1 1 N/A 0 N/A Vprog_ext D8 2 2 7 OT Fault Read_Vout_ IC E0 2 1/512V 6 OT Warning 2 Read_Iout_ IC E1 2 1/100A 5 N/A 2 Read_TS_ IC E2 2 Heat sink temp C 4 N/A Status_temperature 7D 2 CMD_OFF_ I C E3 2 01-OFF, 00-ON 3 N/A 2 OTF_limit_ IC E4 2 OT fault limit C 2 N/A 1 N/A 2 OTF_recovery_ IC E5 2 OT fault recovery C 0 N /A 2 DCOKHI_ I C E6 2 High OV fault (1/512V) 2 DCOKLO_ I C E7 2 Low OV fault (1/512V) Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 10 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Register Code Bit Function Software programming of output voltage permanently 7 Invalid/Unsupported overrides the set point voltage configured by the Vprog signal Command pin. The program no longer looks at the ‘Vprog pin’ and will not respond to any hardware voltage settings. If power is removed 6 Invalid/Unsupported Data from the µController it will reset itself into its default 5 Packet Error Check Failed configuration looking at the Vprog signal for output voltage Status_cml 7E 4 Memory Fault Detected control. In many applications, the Vprog pin is used for setting 3 Processor Fault Detected initial conditions, if different that the factory setting. Software 2 Reserved 2 programming then takes over once I C communications are 1 Other Communications Fault established. 0 Other Memory or Logic Fault To properly hot-plug a power supply into a live backplane, the 7 3.3V_fault system generated voltage should get re-configured into either 6 N/A 5 Interrupt the factory adjusted firmware level or the voltage level Status_mfr_specif 4 Fault detected reconfigured by the margin pin. Otherwise, the voltage state 80 ic 3 PS_remote_OFF of the plugged in power supply could be significantly different 2 DC_fault than the powered system. 1 INPUT_fault Vout_OV_warn_limit (42): OV_warning is extremely useful 0 N/A because it gives the system controller a heads up that the output voltage is drifting out of regulation and the power supply is close to shutting down. Pre-amative action may be Command Descriptions taken before the power supply would shut down and Operation (01) : By default the Power supply is turned ON at potentially disable the system. power up as long as Power ON/OFF signal pin is active HI. The OC and OT_fault_ response (47, 50): The default response for Operation command is used to turn the Power Supply ON or both OC and OT is auto_restart (hiccup). Each register, OFF via the PMBus. The data byte below follows the individually, can be reconfigured into a latched state. Latched OPERATION command. and hiccup are the only supported states. Restart after a latch off: Either of four restart possibilities are FUNCTION DATA BYTE available. The hardware pin Remote ON/OFF may be turned Unit ON 80 OFF and then ON. The unit may be commanded to restart via Unit OFF 00 i2c through the Operation command by first turning OFF then turning ON . The third way to restart is to remove and reinsert the unit. The fourth way is to turn OFF and then turn ON ac To RESET the power supply cycle the power supply OFF, wait at power to the unit. The fifth way is by changing firmware from least 2 seconds, and then turn back ON. All alarms and latch off to restart. Each of these commands must keep the shutdowns are cleared during a restart. power supply in the OFF state for at least 2 seconds, with the Clear_faults (03): This command clears all STATUS and FAULT exception of changing to restart. registers and resets the SMBAlert# line. A power system that is comprised of a number of power If a fault still persists after the issuance of the clear_faults supplies could have difficulty restarting after a shutdown event command the specific registers indicating the fault are reset because of the non-synchronized behavior of the individual and the SMBAlert# line is activated again. power supplies. Implementing the latch-off mechanism WRITE_PROTECT register (10): Used to control writing to the permits a synchronized restart that guarantees the PMBus device. The intent of this command is to provide simultaneous restart of the entire system. protection against accidental changes. All supported A synchronous restart can be implemented by; command parameters may have their parameters read, 1. Issuing a GLOBAL OFF and then ON command to all power regardless of the write_protect settings. The contents of this supplies, register can be stored to non-volatile memory using the 2. Toggling Off and then ON the Remote ON/OFF signal Store_default_code command. The default setting of this 3. Removing and reapplying input commercial power to the register is disable_all_writes except write_protect 0x80h. entire system. FUNCTION DATA BYTE Enable all writes 00 The power supplies should be turned OFF for at least 20 – 30 Disable all writes except write_protect 80 seconds in order to discharge all internal bias supplies and Disable all writes except write_protect and 40 reset the soft start circuitry of the individual power supplies. OPERATION Auto_restart: Auto-restart is the default configuration for recovering from over-current and over-temperature Vout_Command (21) : This command is used to change the shutdowns. output voltage of the power supply. Changing the output An overvoltage shutdown is followed by three attempted voltage should be performed simultaneously to all power restarts, each restart delayed 1 second, within a 1 minute supplies operating in parallel using the Global Address window. If within the 1 minute window three attempted (Broadcast) feature. If only a single power supply is instructed restarts failed, the unit will latch OFF. If less than 3 shutdowns to change its output, it may attempt to source all the required occur within the 1 minute window then the count for latch OFF power which can cause either a power limit or shutdown resets and the 1 minute window starts all over again. condition. Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 11 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Vin_UV_warn_limit (58): This is another warning flag Control and Read accuracy: indicating that the input voltage is decreasing dangerously close to the low input voltage shutdown level. The estimates below are believed to be reasonable under most operating conditions. However, these are typical numbers and Status_word (79): returns two bytes of information. The upper not hard bound values that cannot be exceeded. In most byte bit functionality is tabulated in the Status_word section. nominal operating conditions the returned values are The lower byte bit functionality is identical to Status_byte. significantly better than these estimates. Fan_speed (D7): This register can be used to ‘read’ the fan FUNCTION ACCURACY speed in adjustment percent (0 – 100%) or set the fan speed in Vout_command ± 2% adjustment percent (0 – 100%). The speed of the fan cannot Vout_OV_fault_limit ± 3% be reduced below what the power supply requires for its ± 4% of FL Iout_OC_warn_limit operation. The register value is the percent number, it is not in OT_warn_limit ± 5C linear format. ± 3% Vin_UV_warn_limit Invalid commands or data: The power supply notifies the ± 3% Vin_UV_fault_limit MASTER if a non-supported command has been sent or invalid ± 2% Read_Vout data has been received. Notification is implemented by setting ± 4% of FL Read_Iout the appropriate STATUS and ALARM registers and setting the Read_temperature ± 5C SMBAlert# flag. ±5% Read_Pout If a non-supported read is requested the power supply will return all 0x00h. EEPROM Restart after a lachoff: To restart after a latch_off either of four restart mechanisms are available. The hardware pin The microcontroller has 96 bytes of EEPROM memory available Remote ON/OFF may be turned OFF and then ON. The unit for the system host. may be commanded to restart via i2c through the Operation A separate EEPROM IC, with write protect features, provides command by first turning OFF then turning ON . The third way another 128 bytes of memory. This EEPROM contains the to restart is to remove and reinsert the unit. The fourth way is following FRU_ID information: to turn OFF and then turn ON ac power to the unit. The fifth way is by changing firmware from latch off to restart. Each of EEPROM: model number, revision, date code, serial number etc. these commands must keep the power supply in the OFF state Offset Length Value Description for at least 2 seconds, with the exception of changing to 00 7 Serial number restart. 07 1 20 ASCII space A successful restart shall clear all alarm registers. 08 4 Date code [YY,WW], ASCII numeric value 0C 1 20 ASCII space A power system that is comprised of a number of power 0D 17 Model#, ASCII alphanumeric value supplies could have difficulty restarting after a shutdown event 1E 1 20 ASCII space because of the non-synchronized behavior of the individual 1F 1 Revision, ASCII value power supplies. Implementing the latch-off mechanism 20-FF 224 FF permits a synchronized restart that guarantees the simultaneous restart of the entire system. LEDs A synchronous restart can be implemented by; Three LEDs are located on the front faceplate. When the LEDs 1. Issuing a GLOBAL OFF and then ON command to all power are ON GREEN then input and output are normal. supplies, 2. Toggling Off and then ON the Remote ON/OFF signal When the FAULT_LED is RED then a fault condition exists and the power supply may not provide output power. The table 3. Removing and reapplying input commercial power to the entire system. below further defines these states: It is good practice to turn OFF the power supplies for about 20 – 30 seconds in order to discharge all internal bias supplies and reset the soft start circuitry of the individual power supplies. Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 12 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Alarm Table LED Indicator Monitoring Signals Test Condition INPUT OK DC OK FAULT FAULT DC OK INPUT OK TEMP OK 1 Normal Operation Green Green OFF High High High High Red 2 Low or NO INPUT OFF OFF Low Low Low High Red 3 OVP Green OFF Low Low High High Red 4 Over Current Green OFF Low Low High High Red 5 Over Temp Alarm Green Green Low High High Low Red 6 Over Temp Fault Green OFF Low Low High Low Note: Test condition #2 has 2 modules working in parallel. One module is running and the other has no iNPUT. Outline Drawing #10-32 GROUND STUD AIR INLET HANDLE INPUT CONNECTOR GREEN LED (INPUT-OK) GREEN LED (DC-OK) 1.250 RED LED (FAULT) 0.494 Input connector: FCI Berg 51939-311 or TYCO 6450129-3 Output connector: FCI Berg 51939-030 10 Input mate: FCI Berg 10080594-1E0101LF Output mate: FCI Berg 51915-051 0.50 14.250 ±.020 4.000 ±.020 POT ADJ. 0.330 Airflow COVER 1.610 ±.020 CHASSIS 10 This is a cable harness with 10 foot of #10ga stranded wire (2 – black and 2 – red) not-terminated on user end Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 13 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Connector Pin Assignments Input Pin Function Pin Function P1 - DC input P3 + DC input P2 - DC input P4 + DC input Output Pin Function Pin Function Pin Function Pin Function A1 Vstb [3.3V] B1 Fault C1 ISHARE D1 VProg A2 Vstb [3.3V] Return B2 I Monitor (IMON) C2 N/C D2 OVP Test Point A3 Signal Return B3 PS Present C3 Over Temp Warning D3 Remote ON/OFF 2 A4 Write Protect (WP) B4 Enable C4 I C Address (A0) D4 DC OK 2 2 A5 Remote Sense (+) B5 SDA (I C bus) C5 I C Address (A1) D5 INPUT OK 2 2 A6 Remote Sense (-) B6 SCL (I C bus) C6 I C Address (A2) D6 SMBAlert P1 N/C P2 N/C P3 N/C P4 +Vout P5 +Vout P6 Output Return P7 Output Return Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 14 Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om Data Sheet GE Critical Power GE CAR2548DC SERIES CAR2548DC series dc-dc converters 2500 Watt Front End Power Supply Power Supply Input: -36Vdc to -75Vdc; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A Measures: 14.25 x 4.00 x 1.65”” Ordering Information Please contact your GE Sales Representative for pricing, availability and optional features. PRODUCT DESCRIPTION PART NUMBER 2500W converter 48Vdc dc-dc converter w/Bezel, 3.3Vaux CAR2548DCXXXZ01A 10KW SHELF Shelf for CAR2548 modules holds 4 units ACE254RUW48XZ01A PART NUMBER DEFINITION GUIDE EXAMPLE CAR 25 48 DCx xxZ 01 A A – Standard Options Output Power model 25 = 2500W B – bezel RTM R – reverse airflow Output voltage Vsb = 5 48 = 48Vdc Type RoHS FP – AC; V positive o- Blank – non compliant TN – AC; V _negative o Y – 5 of 6 compliant DC - DC Z – 6 of 6 compliant Contact Us For more information, call us at USA/Canada: +1 888 546 3243, or +1 972 244 9288 Asia-Pacific: +86.021.54279977*808 Europe, Middle-East and Africa: +49.89.878067-280 India: +91.80.28411633 www.ge.com/powerelectronics December 6, 2013 ©2013 General Electric Company. All rights reserved. Page 15 Specifications are subject to change without notice. It is responsibility of each customer to thoroughly test each product and part number under their unique parameters and environments to ensure a product will work properly and reliably. Click below for more details, to buy on-line or request volume pricing: (866) 588-1750 power@sager .com http://power.sager.com/ge-energy-CAR2548DC-power-supply.html h t t p: / / pow e r. sa ge r. c om