Data Sheet GE CP2500DC54PE-F Compact Power Line DC/DC Converter Input: -40 to -72Vdc; Outputs: ±54 Vdc @ 2500W; 5 Vdc @ 4W Features  Compact 1-RU form factor providing 22 W/in3  Input Current < 75A at 40 Vdc input  Programmable output voltage from 44V to 58 Vdc,  Output defaulted to 54V 2  PMBus compliant dual I C serial bus communications  Designed to IEEE802.3af Compliance, 2250V output*** isolation to chassis/signals for POE applications.  DC Output over-voltage and over-current protection  DC Input over-voltage and under-voltage protection Applications  Over-temperature warning and protection  48Vdc distributed power architectures  Redundant, parallel operation with active load sharing and isolated 2 redundant +5V Aux power, isolated signals and I C communications  Power over Ethernet  Remote ON/OFF  Routers/Switches  Hot insertion/removal (hot plug)  VoIP/Soft Switches  Two front panel LED indicators  LAN/WAN/MAN applications  UL* Recognized to UL60950-1, CAN/ CSA† C22.2 No. 60950-1, and  File servers VDE‡ 0805-1 Licensed to IEC60950-1  Indoor wireless  RoHS 6 compliant  Telecommunications equipment  Enterprise Networks  SAN/NAS/iSCSI applications  Advanced workstations Description The CP2500DC54PE-F DC/DC Converter, [also called a Power Entry Module (PEM)] in the Compact Power Line platform is specifically designed to operate as an integral part of a complete distributed power system. High-density, front-to-back airflow is designed for minimal space utilization and is highly expandable for future growth. This PEM complements the CP3000AC54TE-F rectifier, thus providing comprehensive solutions for systems connected either to commercial ac mains, 48/60Vdc power plants or telecom central offices. The 2 standard product is provided with many features including PoE isolation and dual-redundant I C communications busses that allow it to be used in a broad range of applications. Feature set flexibility makes this Power Entry Module an excellent choice for applications requiring modular dc-to-dc bulk intermediate voltages, such as in distributed power. * 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. ** ISO is a registered trademark of the International Organization of Standards. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 1  Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Electrical Specifications Input Parameter Min Typ Max Units Notes Operating Voltage -40 -72 Vdc Low Input Shutdown of Main -38.5 -39 -39.5 Vdc output Input Turn-ON of both Outputs -43 -43.5 -44 Vdc Reverse Input Voltage The module shall not be damaged Idling Power Output OFF 35 5Vdc output at no-load W Output ON 60 Both outputs at no-load Input Current 75 Adc At input voltages > 40Vdc Measured at 25C for all line conditions. Does not include X- 100 Cold Start Inrush Current Adc capacitor charging spike 92 At 50% load Efficiency % 88 At 25% and 100% load Holdup Time 6 ms Minimum Vin = 48Vdc, output at ½ Full Load, output can droop down to -40Vdc Ride Through 6 ms Input Capacitance 25 F Main Output Parameter Min Typ Max Units Notes Maximum Output Power 2500 W At voltages > 54Vdc Output Voltage Setpoint 54 Vdc Output floats with respect to frame ground. Voltage Regulation Set Point at 50% FL 54 Vdc Resets to factory setting if power is removed Set Point Tolerance -0.5 0.5 % Set Point Regulation -1 1 % All conditions (temp, line, drift) Droop Regulation 1 Vdc Linear from 1 to 39 A. Droop Accuracy -5 5 % All conditions (temp, line, drift) 2 Set either by I C, or analog margining. Output Voltage Range 44 58 Vdc At 54Vdc. Below 0.1A the module meets its regulation A Output Current 0.1 46.3 requirements. Reverse (sink) output current 0.5 A Isolation function provided Single-wire connection. Loads > 25%FL 5 %FL Active Current Share -5 Single-wire connection. Loads > 25%FL, between the 7 %FL Proportional current share -7 CP3000AC54TEPZ-F and this converter. Between modules without the single wire connection. +15 %FL Passive Current Share -15 Loads > 25%FL Output Ripple (5 to 20MHz) RMS 250 mVrms Measured with 20MHz bandwidth under any condition of loading. Minimum load is 1A. Peak-to-Peak 500 mVpk-pk External capacitance can be increased but the power 0 5,000 F supply will not meet its turn-ON rise time requirement. External Bulk Load Capacitance June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 2 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Electrical Specifications (continued) Output (continued) Parameter Min Typ Max Units Notes Turn-On Monotonic Turn_On after detection of valid DC input voltage. Measured from 30% to 100% of Vnom. Delay 5 s 1 Rise Time 500 ms Overshoot 5 % Shutdown is delayed during a re-start in order to guarantee restart 20 S Restart Shutdown Delay of multiple paralleled modules. Load Step Response I/t slew rate 1A/µs. I 50 %FL Settling time to within regulation requirements. V 2.0 Vdc Response Time 2 ms 2 Overload Current Limit 100 125 %FL Fold-down. Shutdown 39 Vdc Default state – hiccup mode System Start-up A 20 second shutdown delay is implemented to allow modules to be plugged in one at a time. During this time fold-down occurs but the module will not shut down below 39Vdc. Over-voltage Delayed 60 Vdc 200msec delayed shutdown implemented. Instantaneous 65 Vdc Latched shutdown without hiccup. Latchoff Three restart attempts are implemented within a one minute window prior to a latched shutdown when Vout < 65Vdc. Beyond 1 minute the counter restarts Over-temperature Warning 5 °C Implemented prior to commencement of an OT shutdown Below the maximum rating of the device being protected 3 Shutdown 20 °C Temperature hysteresis of approximately 10°C provided between shutdown and restart. Auto-recoverable Auxiliary Output Parameter Min Typ Max Units Notes ON when the input voltage is -36 -72 Vdc Output Voltage Setpoint 5.2 Vdc Isolated from the main output to meet POE requirements. Output Current 0.005 0.75 A 50mA dedicated for powering adjacent PEMs during a fault. 700mA available for external use. Overall Regulation -5 +5 % Ripple and Noise 50 100 mVpk-pk 20MHz bandwidth. Measured across a 1F tantalum and a 25 mVrms 0.1F ceramic capacitor Over-voltage Clamp 7 Vdc Over-current Limit 110 175 %FL Isolation from the main output 2250 Vdc Isolation from frame ground 50 Vdc A 1MΩ noise suppression resistor is connected between Logic_GRD and Frame_GRD. 1 Below -5C the rise time is approximately 5 minutes to protect bulk capacitors in the unit 2 Hiccup performance attempts automatic recovery from an overload shutdown with approximately a 90% off-time duty cycle. The duty cycle varies periodically in order to guarantee multi-module recovery synchronization. Latchoff can be chosen via software instead of the default hiccup. Recovery from a latchoff requires ENABLING, or software commanding OFF followed by an ON after a 2 second delay. 3 Design target is to issue a OTW signal approximately 5C below shutdown at full load, and shut down at ≥ 55C. Test at V = 54V IN DC June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 3 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Mechanical, Environmental and EMC Specifications Dimensions (nominal) Length (in./mm) 17.2 / 440.3 Width (in./mm) 4.00 / 101.6 Height (in./mm) 1.66 / 42.2 Weight (lb/kg) 4.6 / 2.1 Environmental Parameter Min Typ Max Units Notes Ambient Temperature 4 Operating -5 45 °C Air inlet from sea level to 5,000 feet. Ambient Derating 1 °C Per 1,000 feet above 5,000 feet. 2 Power Derating 1 %/°C Up to 55°C Storage Temperature -40 85 °C Humidity 5 95 % Relative humidity, non-condensing Shock and Vibration Meets IPC 9592 Class II, Section 5 requirements EMC, Performance Parameter Min Typ Max Units Notes 5 3 Radiated Emissions FCC and CISPR22 (EN55022) - Class A Conducted Emissions - dc Telcordia GR-1089-CORE and CISPR22 (EN55022) - Class A ESD Error free per EN/IEC 61000-4-2 Level 4 (8 kV contact discharge, 15 kV air discharge). Radiated Immunity Error free per EN/IEC 61000-4-3 Level 3 (10 V/m). Differential mode surge 100 Vdc ANSI T1.315, No errors Differential mode surge transient 1000 Vdc No errors. IEEE C62.41 defined pulse transient Common mode surge 1000 Vdc (1.2/50s pulse) Conducted Immunity Error free per EN/IEC 61000-4-6 Level 3 (10Vrms). At ambient of 25°C at full load per Telcordia SR-332, Reliability Reliability (calculated) 400,000 Hours Prediction for Electronic Equipment, Method I Case III. Isolation Input-Chassis/Signals 1700 Per EN60950. Input-Output/Signals 2250 Vdc Output-Chassis/Signals 2250 Per IEEE802.3af. Main-Aux Outputs 2250 Service Life 10 Years 25°C ambient, full load excluding fans. Acoustic Noise 55 dBA Noise is proportional to fan speed, load and ambient temperature. 4 Designed to start at an ambient as low as -40°C, but may not meet operational limits until above -5°C. 5 Radiated emissions compliance was met using a GE shelf. This shelf includes output common and differential mode capacitors that assist in meeting compliance. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 4 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W will turn OFF if either the Remote ON or the INTERLOCK pin Status and Control is released. This signal is referenced to Logic_GRD. The PEM provides two means for monitor/control: analog or 2 I C. INTERLOCK: This is a short pin utilized for hot-plug applications to ensure that the power supply turns OFF Hot Plug before the power pins are disengaged. It also ensures that When rapidly extracting and reinserting modules care the power supply turns ON only after the power pins have should be taken to allow for discharging the internal bias been engaged. Must be connected to V_OUT (-DC). supply so that a predictable restart could be achieved. The way to ensure that the circuit sufficiently discharges is to 8V_INT: Single wire connection between modules, Provides observe the spinning of the fans after an extraction. The unit bias to the DSP of an unpowered module. should not be reinserted until the fans stop spinning. Reset: This is a PCA9541 multiplexer function utilized during Without bleeding down internal bias the module may PMBus communications. If momentarily grounded remember its last assigned address and may not configure (Logic_GRD), the multiplexer would reset itself. itself properly if reinserted into another slot. Unit Address: Each module has an internal 10kΩ resistor Control Definitions pulled up between unit_address and 3.3V . A resistor DC All signals are referenced to Logic_GRD unless otherwise between unit_address and Vout(-) sets the appropriate unit noted. See the Signal Definitions Table at the end of this address. document for further description of all the signals. 2 I C address Control Signals Rectifier Resistor Vprog A1 A0 Value Margining: Set point of the PEM can be changed via this 1 30K 2.477 0 0 input pin. Programming can be either a voltage source or a 2 14K 1.925 0 1 resistance divider. The margining pin is connected to 3.3Vdc 3 6K 1.243 1 0 via a 10kΩ resistor inside the PEM. See graphs below. 4 2.5K 0.654 1 1 -58 3.3Vdc Shelf Address: A voltage between the shelf address pin and Vout(-), configures up to 8 different shelves. Since PMBus addressing is limited to a maximum of 8 modules, the shelf address is decoded into either shelf 0 or shelf 1. -46 -44 Vcontrol Shelf_address 1 2 3 4 Maximum voltage 3.45 2.97 2.56 2.14 Nominal voltage 3.30 2.86 2.4 1.96 Minimum voltage 3.00 2.60 2.18 1.73 Address bit- A2 0 1 0 1 0 0.1 Shelf_address 5 6 7 8 Maximum voltage 1.70 1.25 0.80 0.25 Nominal voltage 1.50 1.10 0.60 0.01 An open circuit on this pin reverts the voltage level back to Minimum voltage 1.29 0.84 0.30 0 the original setting. Address bit- A2 0 1 0 1 Software commanded margining overrides the hardware Status Signals set point indefinitely or until the default setting is reinstated for example if input power and bias power have been Power_OK: This signal is HI when the main output is present removed from the module. and goes LO when the main output is not present. Module Present Signal: This signal has dual functionality. It I_limit: This signal is HI when the main output is not in can be used to alert the system when a module is inserted. current limit and goes LO when current limit has activated. A 500Ω resistor is present in series between this signal and Logic_GRD. An external pull-up should not raise the voltage 2 Alert #: I C interrupt signal. on the pin above 0.25Vdc. Above 1Vdc, the write_protect feature of the EEPROM is enabled. Fault: This signal goes LO for any failure that requires PEM replacement. Some of these faults may be due to: 2 Remote ON: On/Off control when I C communications are  Fan failure utilized as configured by the Protocol pin. This pin must be  Over-temperature condition pulled low to turn ON the power supply. The power supply  Over-temperature shutdown June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 5 Output Setpoint (Vdc) Vprogram 10k Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W  Over-voltage shutdown  Internal PEM Fault Digital Feature Descriptions PMBus™ compliance: The power supply is fully compliant to the Power Management Bus (PMBus™) rev1.2 requirements with the following exceptions: 2 Diagram showing the dual I C bus system. The power supply continuously updates its STATUS and Control can be taken over at any time by a specific ‘master’ ALARM registers to the latest state in order to capture the ‘present’ state of the power supply. There are a number of even during data transmission to the other ‘master’. The indicators, such as those indicating a communications fault ‘master’ needs to be able to handle incomplete (PEC error, data error) that do not get cleared until transmissions in the multi-master environment in case specifically instructed by the host controller sending a switching should commence in the middle of data clear_faults command. A ‘bit’ indicator notifies the user if the transmission. STATUS and ALARM registers changed since the last ‘read’ by the host controller. Master/Slave: The ‘host controller’ is always the MASTER. Power supplies are always SLAVES. SLAVES cannot initiate For example, if a voltage surge causes a momentary communications or toggle the Clock. SLAVES also must shutdown for over voltage the power supply will respond expeditiously at the command of the MASTER as automatically restart if the ‘auto_restart’ feature is invoked. required by the clock pulses generated by the MASTER. During the momentary shutdown the power supply issues an Alert# indicating to the system controller that a status change has occurred. If the system controller reads back Clock stretching: The ‘slave’ µController inside the power the STATUS and ALARM registers while the power supply is supply may initiate clock stretching if it is busy and it desires shut down it will get the correct fault condition. However, to delay the initiation of any further communications. During inquiry of the state of the power supply after the restart the clock stretch the ‘slave’ may keep the clock LO until it is event would indicate that the power supply is functioning ready to receive further instructions from the host controller. The maximum clock stretch interval is 25ms. correctly. The STATUS and ALARM indicators did not freeze at the original shutdown state and so the reason for the The host controller needs to recognize this clock stretching, original Alert# is erased. The restart ‘bit’ would be set to and refrain from issuing the next clock signal, until the clock indicate that an event has occurred. line is released, or it needs to delay the next clock pulse The power supply also clears the STATUS and ALARM beyond the clock stretch interval of the power supply. registers after a successful read back of the information in Note that clock stretching can only be performed after these registers, with the exception of communications error th completion of transmission of the 9 ACK bit, the exception alarms. This automated process improves communications being the START command. efficiency since the host controller does not have to issue another clear_faults command to clear these registers. 2 Dual, redundant buses: Two independent I C lines provide true communications bus redundancy and allow two independent controllers to sequentially control the power supply. For example, a short or an open connection in one of 2 the I C lines does not affect communications capability on 2 the other I C line. Failure of a ‘master’ controller does not Clock affect the power supplies and the second ‘master’ can take over control at any time. Stretch Example waveforms showing clock stretching. Using the PCA9541 multiplexer: Transition between the two 2 2 Communications speed: Both 100kHz and 400kHz clock I C lines is provided by the PCA9541 I C/01 master selector rates are supported. The power supplies default to the multiplexer, which, upon start-up, connects channel 0. 2 100kHz clock rate. Applications using only a single I C line can immediately start talking across the bus without first requiring to Packet Error Checking: The power supply will not respond reconfigure the multiplexer. to commands without the trailing PEC. The integrity of communications is compromised if packet error correction is not employed. There are many functional features, including turning OFF the main output, that require validation to ensure that the correct command is executed. PEC is a CRC-8 error-checking byte, based on the polynomial 8 2 C(x) = x + x + x + 1, in compliance with PMBus™ June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 6 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W requirements. The calculation is based in all message bytes, been used or addressed. This may occur because the including the originating write address and command bytes default state of the PCA9541/01 integrated circuit issues 2 preceding read instructions. The PEC is appended to the Alert# to both i C lines for all possible transitioning states of message by the device that supplied the last byte. the device. For example, a RESET caused by a glitch would cause the Alert# to be active. SMBusAlert#: The power supply can issue SMBAlert# driven If the PCA9541 is not going to be used in a specific 2 from either its internal micro controller (µC) or from the application (such as when only a single I C line is utilized), 2 PCA9541 I C bus master selector. That is, the SMBAlert# it is imperative that interrupts from the PCA9541 are de- signal of the internal µC funnels through the PCA9541 activated by the host controller. To de-activate the interrupt master selector that buffers the SMBAlert# signal and splits registers the PCA9541 the ‘master’ needs to address the the signal to the two SMBAlert# signal pins exiting the power PCA9541 in the ‘write’ mode, the interrupt enable (IE) supply. In addition, the PCA9541 signals its own SMBAlert# register needs to be accessed and the interrupt masks have request to either of the two SMBAlert# signals when to be set to HI ‘1’. (Note: do not mask bit 0 which transmits required. Alert# from the power supply). This command setting the interrupt enable register of the PCA9541 is shown below; Non-supported commands: Non supported commands are Start Unit Address ACK flagged by setting the appropriate STATUS bit and issuing an 1 7 6 5 4 3 2 1 0 1 SMBAlert# to the ‘host’ controller. S 1 1 1 0 A2 A1 A0 0 A Data out-of-range: The power supply validates data settings and sets the data out-of-range bit and SMBAlert# if Command Code ACK IE Register Stop the data is not within acceptable range. 8 1 8 0x00 A 0x0E P SMBAlert# triggered by the µC: The µC driven SMBAlert# signal informs the ‘master/host’ controller that either a There are two independent interrupt enable (IE) registers, 2 2 STATE or ALARM change has occurred. Normally this signal one for each controller channel (I C-0 and I C-1). The is HI. The signal will change to its LO level if the power interrupt register of each channel needs to be configured 2 supply has changed states and the signal will be latched LO independently. That is, channel I C-0 cannot configure the IE 2 until the power supply receives a ‘clear’ instruction as register of I C-1 or vise-versa. outlined below. If the alarm state is still present after the This command has to be initiated to the PC9541 only once ‘clear_faults’ command has been received, then the signal after application of power to the device. However, every will revert back into its LO level again and will latch until a time a restart occurs the PCA9541 has to be reconfigured subsequent ‘clear’ signal is received from the host controller. since its default state is to issue Alert# for changes to its internal status. The signal will be triggered for any state change, including the following conditions; If the application did not configure the interrupt enable register the Alert# line can be cleared (de-activated), if it has  VIN under or over voltage been activated by the PCA9541, by reading back the data  Vout under or over voltage from the interrupt status registers (Istat).  IOUT over current Refer to the PCA9541 data sheet for further information on  Over Temperature warning or fault how to communicate to the PCA9541 multiplexer.  Fan Failure  Communication error Please note that the PCA9541 does not support Packet Error Checking (PEC).  PEC error  Invalid command 2 Re-initialization: The I C code is programmed to re-initialize  Internal faults if no activity is detected on the bus for 5 seconds. Re- The power supply will clear the SMBusAlert# signal (release 2 initialization is designed to guarantee that the I C the signal to its HI state) upon the following events: µController does not hang up the bus. Although this rate is  Completion of a ‘read_status’ instruction longer than the timing requirements specified in the SMBus  Receiving a CLEAR_FAULTS command specification, it had to be extended in order to ensure that a re-initialization would not occur under normal transmission  The main output recycled (turned OFF and then ON) via rates. During the few µseconds required to accomplish re- the REMOTE ON signal pin 2 initialization the I C µController may not recognize a  The main output recycled (turned OFF and then ON) by command sent to it. (i.e. a start condition). the OPERATION command Global broadcast: This is a powerful command because it SMBAlert# triggered by the PCA9541: If clearing the Alert# can instruct all power supplies to respond simultaneously in signal via the clear_faults or read back fails, then reading one command. But it does have a serious disadvantage. back the Alert# status of the PCA9541 will be necessary Only a single power supply needs to pull down the ninth followed by clearing of the PCA9541 Alert#. acknowledge bit. To be certain that each power supply The PCA9541 can issue an Alert# even when single bus responded to the global instruction, a READ instruction operation is selected where the bus master selector has not should be executed to each power supply to verify that the June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 7 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W command properly executed. The GLOBAL BROADCAST Direct mode data format: The Direct Mode data format is R command should only be executed for write instructions to supported, where y = [ mX + b ] x 10 . Y is the data value slave devices. from the controller and x is the ‘real’ value either being set Note: The PCA9541 i2c master selector does not respond to or returned, except for VIN and Fan speed x is the data value the GLOBAL BROADCAST command. from the controller and y is the ‘real’ value. For example, to set the output voltage to 50.45VDC, Multiply Read back delay: The power supply issues the SMBAlert # the desired set point by the m constant, 50.45 x 400 = notification as soon as the first state change occurred. 20,180. Convert this binary number to its hex equivalent: During an event a number of different states can be 20,180b = 0x4ED4. The result is sent LSB=0xD4 first, then transitioned to before the final event occurs. If a read back is MSB=0x4E. implemented rapidly by the host a successive SMBAlert# The constants are could be triggered by the transitioning state of the power FUNCTION Operation m b R supply. In order to avoid successive SMBAlert# s and read Output voltage Write / read 400 0 0 back and also to avoid reading a transitioning state, it is Output voltage shutdown prudent to wait more than 2 seconds after the receipt of an Output Current read 5 0 0 SMBAlert# before executing a read back. This delay will Temperature read 1 0 0 ensure that only the final state of the power supply is Input Voltage read 25 3500 -2 captured. Fan Speed setting ( % ) read 1 0 0 Fan speed in RPM read 100 0 0 Successive read backs: Successive read backs to the power supply should not be attempted at intervals faster than every one second. This time interval is sufficient for the TM PMBus Command set: internal processors to update their data base so that Command Hex Data Function successive reads provide fresh data. Code Field Operation 01 1 Output ON/OFF Device ID: Address bits A2, A1, A0 set the specific address of Clear_Faults 03 0 Clear Status the power supply. The least significant bit x (LSB) of the Vout_command 21 2 Set Vout address byte configures write [0] or read [1] events. In a write command the system instructs the power supply. In a Vout_OV_fault_limit 40 2 Set OV fault limit read command information is being accessed from the Read_status D0 10 Read Status, V , I , T out out power supply. LEDs test ON D2 0 Test LEDs Address Bit LEDs test OFF D3 0 7 6 5 4 3 2 1 0 PCA9541 1 1 1 0 A2 A1 A0 R/W Enable_write D6 0 Enable EEPROM write Micro controller 1 0 0 0 A2 A1 A0 R/W Disable_write D7 0 Disable EEPROM write External EEPROM 1 0 1 0 A2 A1 A0 R/W Inhibit_restart D8 0 Latch upon failure Global Broadcast 0 0 0 0 0 0 0 0 MSB LSB Auto_restart D9 0 Hiccup Isolation_test DA 0 Perform isolation test The Global Broadcast instruction executes a simultaneous Read_input_string DC 2 Read Vin and Pin write instruction to all power supplies. A read instruction Read_firmware_rev DD 3 Firmware revisions cannot be accessed globally. The three programmable Read_run_timer DE 3 Accumulated ON state 2 address bits are the same for all I C accessible devices Fan_speed_set DF 3 Fan speed control within the power supply. Fan_normal_speed E0 0 Stop fan control TM PMBus Commands Read_fan_speed E1 4 Fan control & speed Stretch_LO_25ms E2 0 Production test feature Standard instruction: Up to two bytes of data may follow an instruction depending on the required data content. Analog data is always transmitted as LSB followed by MSB. PEC is mandatory and includes the address and data fields. 1 8 1 8 1 Command Descriptions S Slave address Wr A Command Code A Operation (01h) : By default the Power supply is turned ON 8 1 8 1 8 1 1 at power up as long as REMOTE ON is active LO. The Low data byte A High data byte A PEC A P Operation command is used to turn the Power Supply ON or Master to Slave Slave to Master OFF via the PMBus. The data byte below follows the SMBUS annotations; S – Start , Wr – Write, Sr – re-Start, Rd – OPERATION command. Read, A – Acknowledge, NA – not-acknowledged, P – Stop FUNCTION DATA BYTE Unit ON 0x80 Unit OFF 0x00 June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 8 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W 1 8 1 8 1 To RESET the power supply cycle the power supply OFF, wait S Slave address Wr A Command Code A at least 2 seconds, and then turn back ON. All alarms and shutdowns are cleared during a restart. 1 8 1 8 1 Sr Slave address Rd A Byte count = 9 A Clear_faults (03h): This command clears information bits in the STATUS registers, these include: 8 1 8 1 8 1  Isolation OK Status-2 A Status-1 A Alarm-2 A  Isolation test failed  Restarted OK 8 1 8 1 8 1 Alarm-1 A Voltage LSB A Voltage MSB A  Invalid command  Invalid data 8 1 8 1 8 1 1  PEC error Current A Temperature A PEC NA P Vout_Command (21h) : This command is used to change the output voltage of the power supply. Changing the output Status and alarm registers voltage should be performed simultaneously to all power The content and partitioning of these registers is supplies operating in parallel using the Global Address significantly different than the standard register set in the (Broadcast) feature. If only a single power supply is PMBus™ specification. More information is provided by instructed to change its output, it may attempt to source all these registers and they are accessed rapidly, at once, using the required power which can cause either a power limit or the ‘multi parameter’ read back scheme of this document. shutdown condition. There are a total of four registers. All errors, 0 – normal, 1 – Software programming of output voltage overrides the set alarm. point voltage configured during power_up. The program no longer looks at the ‘margin pin’ and will not respond to any Status-2 hardware voltage setting. The default state cannot be Bit Title Description accessed any longer unless power is removed from the DSP. 7 PEC Error Mismatch between computed and To properly hot-plug a power supply into a live backplane, transmitted PEC. The instruction has the system generated voltage should get re-configured into not been executed. Clear_Flags either the factory adjusted firmware level or the voltage resets this register. level reconfigured by the margin pin. Otherwise, the voltage 6 Will Restart Restart after a shutdown = 1 state of the plugged in power supply could be significantly 5 Invalid Instruction The instruction is not supported. An different than the powered system. ALERT# will be issued. Clear_Flags resets this register. Voltage margin range: 42VDC – 58 VDC. 4 Power Capacity n/a A voltage programming example: The task: set the output 3 Isolation test Information only to system controller voltage to 50.45VDC failed 2 Restarted ok Informs HOST that a successful The constants for voltage programming are: m = 400, b and RESTART occurred clearing the status R = 0. Multiply the desired set point by the m constant, and alarm registers 50.45 x 400 = 20,180. Convert this binary number to its hex 1 Data out of range Flag appears until the data value is equivalent: 20,180b = 4ED4h. Transmit the data LSB first, within range. A clear_flags followed by MSB, command does not reset this register 0 x D44Eh. until the data is within normal range. 0 Remote ON pin HI State of the REMOTE ON pin, HI = 1 = Vout_OV_fault_limit (40h) : This command sets the Output OFF Overvoltage Shutdown level. TM Manufacturer-Specific PMBus Commands Isolation test failed: Since the power supply cannot Many of the manufacturer-specific commands read back determine whether sufficient redundancy is available, the more than two bytes. If more than two bytes of data are results of this test are provided, but the ‘internal fault’ flag is TM returned, the standard SMBus Block read is utilized. In this not set. process, the Master issues a Write command followed by Status-1 the data transfer from the power supply. The first byte of the Block Read data field sends back in hex format the number Bit Title Description of data bytes, exclusive of the PEC number, that follows. 7 spare Analog data is always transmitted LSB followed by MSB. A 6 Isolation test OK Isolation test completed successfully. No-ack following the PEC byte signifies that the transmission 5 Internal fault The power supply is faulty is complete and is being terminated by the ‘host’. 4 Shutdown 3 n/a Read_status (D0h) : This ‘manufacturer specific’ command 2 External fault the power supply is functioning OK is the basic read back returning STATUS and ALARM register 1 LEDs flashing LEDs tested test ON = 1 0 Output ON ON = 1 data, output voltage, output current, and internal temperature data in a single read. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 9 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Alarm-2 Unit in Power Limit or in Current Limit: When output voltage is > 36VDC the Output LED will continue blinking. Bit Title Description When output voltage is < 36VDC, if the unit is in the RESTART 7 Fan Fault mode, it goes into a hiccup. When the unit is ON the output 6 No primary No primary detected LED is ON, when the unit is OFF the output LED is OFF. 5 Primary OT Primary section OT When the unit is in latched shutdown the output LED is OFF. 4 DC/DC OT DC/DC section OT 3 Output voltage Internal regulation failure Inhibit_restart (D8h) : The Inhibit-restart command directs lower than bus 2 Thermal sensor Internal failure of a temperature the power supply to remain latched off for over_voltage, failed sensing circuit over_temperature and over_current. The command needs 1 5V out_of_limits Either OVP or OCP occurred to be sent to the power supply only once. The power supply 0 Power delivery a power delivery fault occurred will remember the INHIBIT instruction as long as internal bias is active. Power Delivery: The power supply compares its internal sourced current to the current requested by the current Restart after a lachoff: To restart after a latch_off either of share pin. If the difference is > 10A, a fault is issued. four restart mechanisms are available. The hardware pin Alarm-1 Remote ON may be turned OFF and then ON. The unit may be commanded to restart via i2c through the Operation Bit Title Description command by first turning OFF then turning ON . The third 7 Unit in power limit An overload condition that results in way to restart is to remove and reinsert the unit. The fourth constant power way is to turn OFF and then turn ON ac power to the unit. 6 Primary fault Indicates either primary failure or The fifth way is by changing firmware from latch off to INPUT not present. Used in conjunction with bit-0 and Status_1 restart. Each of these commands must keep the power bits 2 and 5 to assess the fault. supply in the OFF state for at least 2 seconds, with the 5 Over temp. One of the over_temperature exception of changing to restart. shutdown sensors tripped the supply A successful restart shall clear all alarm registers, set the 4 Over temp warning Temperature is too high, close to restarted successful bit of the Status_2 register. shutdown A power system that is comprised of a number of power 3 In over current Shutdown is triggered by low output voltage < 39VDC. supplies could have difficulty restarting after a shutdown 2 Over voltage event because of the non-synchronized behavior of the shutdown individual power supplies. Implementing the latch-off 1 Vout out_of_limits Indication the output is not within mechanism permits a synchronized restart that guarantees design limits. This condition may or the simultaneous restart of the entire system. may not cause an output shutdown. A synchronous restart can be implemented by; 0 Vin out_of_limits The input voltage is outside design limits 1. Issuing a GLOBAL OFF and then ON command to all power supplies, 2. Toggling Off and then ON the REMOTE ON signal LEDS test ON (D2h) : Will turn-ON simultaneously the two 3. Removing and reapplying input commercial power to the front panel LEDs of the Power supply sequentially 7 seconds entire system. ON and 2 seconds OFF until instructed to turn OFF. The intent of this function is to provide visual identification of the The power supplies should be turned OFF for at least 20 – 30 power supply being talked to and also to visually verify that seconds in order to discharge all internal bias supplies and the LEDs operate and driven properly by the micro reset the soft start circuitry of the individual power supplies. controller. Auto_restart (D9h) : Auto-restart is the default LEDS test OFF (D3h) : Will turn-OFF simultaneously the two configuration for overvoltage, overcurrent and front panel LEDs of the Power supply. overtemperature shutdowns. However, overvoltage has a unique limitation. An Enable write (D6h) : This command enables write overvoltage shutdown is followed by three attempted restarts, each restart delayed 1 second, within a 1 minute permissions into the upper ¼ of memory locations for the window. If within the 1 minute window three attempted external EEPROM. A write into these locations is normally 2 restarts failed, the unit will latch OFF. If within the 1 minute disabled until commanded through I C to permit writing into less than 3 shutdowns occurred then the count for latch OFF the protected area. A delay of about 10ms is required from resets and the 1 minute window starts all over again. the time the instruction is requested to the time that the power supply actually completes the instruction. This command resets the power supply into the default See the FRU-ID section for further information of content auto-restart configuration. written into the EEPROM at the factory. Isolation test (DAh): This command verifies functioning of Disable write (D7h) : This command disables write output OR’ing. At least two paralleled power supplies are permissions into the upper ¼ of memory locations for the required. The host should verify that N+1 redundancy is external EEPROM. established. If N+1 redundancy is not established the test can fail. Only one power supply should be tested at a time. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 10 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W 8 1 1 Verifying test completion should be delayed for PEC No-ack P approximately 30 seconds to allow the power supply sufficient time to properly execute the test. Fan_speed_set (DFh) : This command instructs the power Failure of the isolation test is not considered a power supply supply to increase the speed of the fan. The transmitted FAULT because the N+1 redundancy requirement cannot be data byte represents the hex equivalent of the duty cycle in verified. The user must determine whether a true isolation percentage, i.e. 100% = 0 x 64h. The command can only fault indeed exists. increase fan speed, it cannot instruct the power supply to reduce the fan speed below what the power supply requires Read input string (DCh) : Reads back the input voltage and 6 for internal control. input power consumed by the power supply. Fan_normal_speed (E0h): This command returns fan 1 7 1 1 8 S Slave address Wr A Command Code 0xDC control to the power supply. It does not require a trailing data byte. 1 1 7 1 1 A Sr Slave Address Rd A Read_Fan_speed (E1h) : Returns the commanded fan speed in percent and the measured fan speed in RPM from the 8 1 8 1 individual fans. Up to 3 fans are supported. If a fan does not Byte Count = 4 A Voltage A exist (units may contain from 1 to 3 fans), or if the command 8 1 8 1 8 1 1 is not supported the unit return 0x00. Power - LSB A Power - MSB A PEC No-ack P 1 8 1 8 1 Read_firmware_rev [0 x DD]: Reads back the firmware S Slave address Wr A Command 0xE1 A revision of all three µC in the power supply. 1 8 1 8 1 Sr Slave address Rd A Byte count = 5 A 1 7 1 1 8 1 S Slave address Wr A Command Code 0xDD A 8 1 8 1 8 1 8 1 Adjustment % A Fan-1 A Fan-2 A Fan-3 A 1 1 7 1 1 8 1 A Sr Slave Address Rd A Byte Count = 4 A 8 1 1 PEC NA P 8 1 8 1 Primary micro revision A DSP revision A Stretch_LO_25ms (E2h) : Command used for production test of the clock stretch feature. 8 1 8 1 1 I2c Micro revision A PEC No-ack P None supported commands or invalid data: The power supply notifies the MASTER if a non-supported command For example; the read returns one byte for each device (i.e. 2 has been sent or invalid data has been received. Notification 0 x 002114h ). The sequence is primary micro, DSP, and I C is implemented by setting the appropriate STATUS and micro. 0x00 in the first byte indicates that revision ALARM registers and setting the SMBAlert# flag. information for the primary micro is not supported. The number 21 for the DSP indicates revision 2.1, and the Fault Management number 14 for the i2c micro indicates revision 1.4. The power supply records faults in the STATUS and ALARM Read_run_timer [0 x DE]: This command reads back the registers above and notifies the MASTER controller as recorded operational ON state of the power supply in hours. described in the Alarm Notification section of the non- The power supply is in the operational ON state when in conforming event. standby and when it delivers output power. Recorded The STATUS and ALARM registers are continuously updated capacity is approximately 10 years of operational state. with the latest event registered by the rectifier monitoring circuits. A host responding to an SMBusALERT# signal may 1 7 1 1 8 1 receive a different state of the rectifier if the state has S Slave address Wr A Command Code 0xDE A changed from the time the SMBusALERT# has been triggered by the rectifier. 1 7 1 1 8 1 The power supply differentiates between internal faults Sr Slave Address Rd A Byte count = 4 A that are within the power supply and external faults that the power supply protects itself from, such as overload or 8 1 8 1 8 1 input voltage out of limits. The FAULT LED, FAULT PIN or i2c Time - LSB A Time A Time - MSB A alarm is not asserted for EXTERNAL FAULTS. Every attempt is made to annunciate External Faults. Some of these annunciations can be observed by looking at the input LEDs. 6 Input power consumption is not supported by the PEM in order to These fault categorizations are predictive in nature and improve efficiency. The returned value is 00. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 11 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W therefore there is a likelihood that a categorization may not The goal is to identify problems early before a protective have been made correctly. shutdown would occur that would take the power supply out of service. Input voltage out of range: The Input LED will continue blinking as long as sufficient power is available to power the External EEPROM LED. If the input voltage is completely gone the Input LED is 2 A 64k-bit EEPROM is provided across the I C bus. This OFF. EEPROM is used for both storing FRU_ID information and for State Change Definition providing a scratchpad memory function for customer use. A state_change is an indication that an event has occurred Functionally the EEPROM is equivalent to the ST M34D64 that the MASTER should be aware of. The following events part that has its memory partitioned into a write protected shall trigger a state_change; upper ¼ of memory space and the lower ¾ section that cannot be protected. FRU_ID is written into the write  Initial power-up of the system when AC gets protected portion of memory. turned ON . This is the indication from the rectifier that it has been turned ON. Note that the master Write protect feature: Writing into the upper 1/4 of needs to read the status of each power supply to memory can be accomplished either by hardware or reset the system_interrupt. If the power supply is software. back-biased through the 8V_INT or the 5VSTB it The power supply pulls down the write_protect (Wp) pin to will not issue an SMBALERT# when AC power is ground via a 500Ω resistor between the ‘module_present’ turned back ON. signal pin and Logic_GRD (see the Module Present Signal section of Input Signals). Writing into the upper ¼ of  Whenever the power supply gets hot-plugged into memory can be accomplished by pulling HI the a working system. This is the indicator to the module_present pin. system (MASTER) that a new power supply is on An alternative, and the recommended approach, is to issue line. the Enable_write command via software.  Any changes in the bit patterns of the STATUS and Page implementation: The external EEPROM is partitioned ALARM registers are a STATUS change which into 32 byte pages. For a write operation only the starting triggers the SMBALERT# flag. Note that a host- address is required. The device automatically increments issued command such as CLEAR_FAULTS will not the memory address for each byte of additional data it trigger an SMB receives. However, if the 32 byte limit is exceeded the device executes a wrap-around that will start rewriting from Hot plug procedures the first address specified. Thus byte 33 will replace the first Careful system control is recommended when hot plugging byte written, byte 34 the second byte and so on. One needs a power supply into a live system. It takes about 15 seconds to be careful therefore not to exceed the 32 byte page for a power supply to configure its address on the bus based limitation of the device. on the analog voltage levels present on the backplane. If communications are not stopped during this interval, multiple power supplies may respond to specific instructions because the address of the hot plugged power supply always defaults to xxxx000 (depending on which device is being addressed within the power supply) until the power supply configures its address. The recommended procedure for hot plug is the following: The system controller should poll the module_present signal to verify when the power supply is re-inserted. It should time out for 15 seconds after this signal is verified. At the end of the time out all communications can resume. Predictive Failures Alarm warnings that do not cause a shutdown are indicators of potential future failures of the power supply. For example, if a thermal sensor failed, a warning is issued but an immediate shutdown of the power supply is not warranted. Another example of potential predictive failure mechanisms can be derived from information such as fan speed when multiple fans are used in the same power supply. If the speed of the fans varies by more than 20% from each other, this is an indication of an impending fan wear out. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 12 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Table 1: FRU_ID The upper quarter of memory starting from address 6144 shall be reserved for factory ID and factory data. Memory Memory Static Location Location Length Value Decimal (HEX) (bytes) Format Type Description Notes/Example 6144d 0x1800 12 ASCII Fixed GE-energy - Product ID CP2500DC54PE 6156d 0x180C 10 ASCII Fixed GE-energy – Part Number 123456789x or C123456789 6166d 0x1816 6 ASCII Variable GE-energy - Hardware revision x:xxxx controlled by PDI series # 6172d 0x181C 6 ASCII Variable spare 6178d 0x1822 14 ASCII Variable GE-energy - Serial_No 01KZ51018193xx 01 …. Year of manufacture - 2001 KZ … factory, in this case Matamoros 51 .. week of manufacture ______018193xx serial # mfg choice 6192d 0x1830 40 ASCII Variable GE- Manufacturing location “Matamoros, Tamps, Mexico” 6232d 0x1858 8 ASCII Fixed spare 6240d 0x1860 2 HEX Fixed spare 6242d 0x1862 158 ASCII Fixed Customer Information See table below 6400d 0x1900 5 HEX Fixed M, B, & R for voltage read M & B are 2 bytes each sent as MSB and then 6405d 0x1905 5 HEX Fixed M, B, & R for current read LSB. R is one byte. These are stored as two’s complement. 6410d 0x190A 5 HEX Fixed M, B, & R temp read 6415d 0x190F 5 HEX Fixed spare See the section on Direct Mode Constants 6420d 0x1914 5 HEX Fixed M, B, & R for voltage set Stored in the EEPROM for the constants stored 6425d 0x1919 5 HEX Fixed M, B, & R for input voltage read in these fields 6430d 0x191E 1 HEX Variable Validation CHKSUM 6431d 9x191F 5 HEX Fixed M, B, & R for input power read 6436d 0x1924 5 HEX Fixed M, B, & R for fan percent adjust 6441d 0x1929 5 HEX Fixed M, B, & R for fan RPM read 6446d 0 x 192E 5 HEX Fixed M, B, & R for converter input voltage read Notes: CHkSUM is a CRC-8 calculation from location 0x1800 to location 0x19FF without including serial number and checksum locations. chksum_value = 0xFF - (mask of SUM with 0x0000ff) write chksum_value byte to location 0x191E. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 13 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Alarm Table 7 LED Indicator Monitoring Signals LED1 Dual-Color LED2 Test Condition INPUT OK DC OK / Fault FAULT DC OK I_limit OTW 1 Normal Operation Green Green High High High High 2 Out of range INPUT Blinking OFF High Low High High 8 3 No Input OFF OFF High Low High High 4 OVP Green Red Low Low High High 9 5 Over Current Green Blinking High ? Low High 6 Over current shutdown Green OFF High Low Low High 7 Over Temp Warning Green Green High High High Low 8 Over Temp Fault Green Red Low Low High Low 9 Remote ON Green Green High High High High 10 Remote OFF Green OFF High Low High High Note: Test condition #2 has 2 modules working in parallel. One module is running and the other has no INPUT. Blinking: 0.5 sec ON and 0.5 sec OFF. Input Connector: FCI Berg 51939-311 or TYCO 6450129-3 10 Input mate: FCI Berg 10080594-1ED0101LF Pin Function Pin Function P1 - DC input P3 + DC input P2 - DC input P4 + DC input Output Connector: FCI Berg P/N: 51732-077LF (replaces 51722-10402400ABLF) Mating connector: FCI Berg P/N 51762-10402400ABLF SIGNAL OUTPUT POWER 65 4 3 2 1 P4 P3 P2 P1 Power_OK LOGIC_GRD UNIT_ADDR A SCL_0 SDA_0 N/C B MOD_PRE OTW Alert#_0 Alert#_1 N/C 8V_INT V_OUT V_OUT V_OUT V_OUT C SCL_1 Margin Reset Remote ON Ishare N/C ( - ) ( - ) ( + ) ( + ) Fault 5VA Ilimit D SDA_1 Interlock SHELF_ADDR Notes: 1. Connector is viewed from the rear of the front end 2. Signal pins columns 1 and 2 are referenced to Vout( - ), the rest are referenced to Logic_GRD 3. Last to make-first to break short pin 7 Blinking and pulsing: normally 1 second intervals, 0.5 seconds ON and 0.5 seconds OFF 8 Test condition #3 had 2 modules plug in. One module is running and the other one is with no input. 9 Whether the DC-OK signal changes state depends on the extent of overload and the resulting output voltage level 10 This is a cable harness with 10 foot of #10ga stranded wire (2 – black and 2 – red) not-terminated on user end June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 14 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Signal Definitions All hardware alarm signals (Fault, Power_OK, I_Limit, OTW) are open drain FETs. These signals should be pulled HI to either 3.3V or 5V. Maximum sink current 5mA. An active LO signal (< 0.4Vdc) state is referenced to Logic GRD unless otherwise stated. Contact your GE representative for more details. Function Label Type Description 2 Main Output Control Remote ON Input If shorted to LOGIC_GRD, the PEM output is enabled when using I C mode of operation. May also be toggled to reset a latched OFF PEM. Output Good Power_OK Output An open drain FET; normally HI, indicating output power is present. Changes to LO when the main output is OFF, Current Limit I_Limit Output An open drain FET; normally HI, indicating normal operation. Changes to LO when in current limit, 2 2 I C Interrupt Alert#_0 Output Interrupt signal via I C lines indicating that service is requested from the host Alert#_1 controller. This signal pin is pulled up to 3.3V via a 10kΩ resistor and switches to active LO when an interrupt occurs. PEM Fault Fault Output Indicates that an internal fault exists. An open drain FET; normally HI, changes to LO. Module Present MOD_PRES Output Used to Indicate presence of PEM. Main Output Control INTERLOCK Input Short pin, connects last and breaks first; used to activate and deactivate output during hot-insertion and extraction, respectively. Ref: V_OUT (-DC) Margining Margin Input Allows changing of output voltage through an analog voltage input or via resistor divider. Over-Temperature Warning OTW Output An open drain FET; normally HI, changes to LO approximately 5°C prior to thermal shutdown. PEM address Unit_addr Input Voltage level addressing of PEMs within a single shelf. Ref: V_OUT (-DC). Shelf Address Shelf_addr Input Voltage level addressing of PEMs within multiple shelves. Ref: V_OUT (-DC). Back bias 8V_INT _ Diode OR’ed 8Vdc drain; used to back bias microprocessors and DSP of failed PEM from operating PEMs. Ref: V_OUT (-DC). 2 2 Mux Reset Reset Input Resets the I C lines to I C line 0. Standby power 5VA Output 5V at 0.75A provided for external use by either adjacent power supplies or the using system. Current Share Ishare - A single wire interface between each of the power unit forces them to share the load current. Ref: V_OUT (-DC). 2 2 I C Line 0 SCL_0, SDA_0 Input I C line 0. 2 2 I C Line 1 SCL_1, SDA_1 Input I C line 1. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 15 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Dimensions Top view Front View – with input cable retention Bottom view Rear view Side view All dimensions ± 0.020 June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 16 Data Sheet GE CP2500DC54PE-F dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Ordering Information Item Description Comcode Designed and factory tested to IEEE802.3af POE compliance, 150036993 CP2500DC54PE-F Auxiliary Output: 5Vdc at 0.75A. Contact Us For more information, call us at USA/Canada: +1 877 546 3243, or +1 972 244 9288 Asia-Pacific: +86.021.54279977*808 Europe, Middle-East and Africa: +49.89.878067-280 www.gecriticalpower.com GE Critical Power reserves the right to make changes to the product(s) or information contained herein without notice, and no liability is assumed as a result of their use or application. No rights under any patent accompany the sale of any such product(s) or information. June 16, 2015 ©2013 General Electric Company. All rights reserved. Page 17