Data Sheet GE CP2500DC54PE 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 1 2  RS485 and PMBus compliant dual I C serial bus communications  Designed to IEEE802.3af Compliance, 2250 output*** isolation to chassis/signals for POE applications. (see ordering info)  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  Power over Ethernet 2 redundant +5V Aux power, isolated signals and I C communications  Routers/Switches  Remote ON/OFF  VoIP/Soft Switches  Hot insertion/removal (hot plug)  LAN/WAN/MAN applications  Four front panel LED indicators  File servers †  UL* Recognized to UL60950-1, CAN/ CSA C22.2 No. 60950-1, and ‡  Indoor wireless VDE 0805-1 Licensed to IEC60950-1  Telecommunications equipment §  CE mark meets 2006/95/EC directive  Enterprise Networks  Internal variable-speed fan control  SAN/NAS/iSCSI applications  RoHS 6 compliant  Advanced workstations  POE compliant to IEEE802.3af Description The CP2500DC54PE 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 CP2500AC54TE rectifier, thus providing comprehensive solutions for systems connected either to commercial ac mains, 48/60Vdc power plants or telecom central offices. The standard 2 product is provided with many features including PoE isolation, RS485 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. § This product is 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. 1 Introduced in 2011 April 8, 2018 ©2013 General Electric Company. All rights reserved. Page 1  Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Electrical Specifications Input Parameter Min TypMaxUnits 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 From 75% to 100% of full load Efficiency % 88 For loads > 25% of full load Holdup Time 6 ms Minimum Vin = 48Vdc, output at ½ Full Load, output can droop down to -40Vdc Ride Through 6 ms 25 Input Capacitance F Main Output Parameter Min TypMaxUnits 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 % 1 % All conditions (temp, line, drift) Set Point Regulation -1 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 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 Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Electrical Specifications (continued) Output (continued) Parameter Min TypMaxUnits Notes Monotonic Turn_On after detection of valid DC input voltage. Turn-On Measured from 30% to 100% of Vnom. Delay 5 s 2 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 3 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 Shutdown 20 °C Temperature hysteresis of approximately 10°C provided between shutdown and restart. Auto-recoverable Auxiliary Output Parameter Min TypMaxUnits Notes ON when the input voltage is -26 -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. 2 Below -5C the rise time is approximately 5 minutes to protect bulk capacitors in the unit 3 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. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Mechanical, Environmental and EMC Specifications Dimensions (nominal) Length (in./mm) 13.85 / 351.8 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 MaxUnits 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 Operational Test IEC 68-2 Test Levels IEC 721-3-2 Drop and Tip Over IEC 68-2-31 Earthquake Rating 4 Zone Per Telcordia GR-63-CORE, all floors, when installed in CP Shelf. EMC, Performance Parameter Min Typ MaxUnits 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 Critical Power shelf. This shelf includes output common and differential mode capacitors that assist in meeting compliance. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Status and Control Module Present Signal: This signal has dual functionality. It can 2 The PEM provides two means for monitor/control: analog or I C. be used to alert the system when a module is inserted. A 500Ω resistor is present in series between this signal and Logic_GRD. An Details of analog controls are provided in this data sheet under external pull-up should not raise the voltage on the pin above Signal Definitions. GE Energy will provide separate application 0.25Vdc. Above 1Vdc, the write_protect feature of the EEPROM is 2 notes on the I C protocol for users to interface to the CPL PEMs. enabled. Contact your local GE Energy representative for details. Protocol Select: Establishes the communications mode of the 2 Hot Plug power supply, between analog/I C and RS485 modes. For RS485, When rapidly extracting and reinserting modules care should be connect 10kΩ pull-down resistor to 54_OUT(-DC). taken to allow for discharging the internal bias supply so that a 2 predictable restart could be achieved. The way to ensure that the Enable: On/Off control when I C communications are utilized as circuit sufficiently discharges is to observe the spinning of the fans configured by the Protocol pin. This pin must be pulled low to turn after an extraction. The unit should not be reinserted until the fans ON the power supply. The power supply will turn OFF if either the stop spinning. Enable or the ON/OFF pin is released. This signal is referenced to Logic_GRD. Without bleeding down internal bias the module may remember its last assigned address and may not configure itself properly if ON/OFF: This is a short pin utilized for hot-plug applications to reinserted into another slot. ensure that the power supply turns OFF before the power pins are disengaged. It also ensures that the power supply turns ON only Control Definitions after the power pins have been engaged. Must be connected to All signals are referenced to Logic_GRD unless otherwise noted. V_OUT (-DC). See the Signal Definitions Table at the end of this document for further description of all the signals. Status Signals Power_OK: This signal is HI when the main output is present and Control Signals goes LO when the main output is not present. Margining: Set point of the PEM can be changed via this input pin. I_limit: This signal is HI when the main output is not in current Programming can be either a voltage source or a resistance limit and goes LO when current limit has activated. divider. The margining pin is connected to 3.3Vdc via a 10kΩ resistor inside the PEM. See graphs below. 2 Alert #: I C interrupt signal. -58 3.3Vdc Fault: This signal goes LO for any failure that requires PEM replacement. Some of these faults may be due to: Fan failure -46 Over-temperature condition -44 Vcontrol Over-temperature shutdown Over-voltage shutdown Internal PEM Fault 0 0.1 An open circuit on this pin reverts the voltage level back to the original setting. Software commanded margining overrides the hardware set point indefinitely or until the default setting is reinstated for example if input power and bias power have been removed from the module. nt (Vdc) Output Setpoi Vprogram 10k Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Control can be taken over at any time by a specific ‘master’ Digital Feature Descriptions even during data transmission to the other ‘master’. The PMBus™ compliance: The power supply is fully compliant ‘master’ needs to be able to handle incomplete to the Power Management Bus (PMBus™) rev1.2 transmissions in the multi-master environment in case requirements with the following exceptions: switching should commence in the middle of data The power supply continuously updates its STATUS and transmission. ALARM registers to the latest state in order to capture the Master/Slave: The ‘host controller’ is always the MASTER. ‘present’ state of the power supply. There are a number of Power supplies are always SLAVES. SLAVES cannot initiate indicators, such as those indicating a communications fault communications or toggle the Clock. SLAVES also must (PEC error, data error) that do not get cleared until respond expeditiously at the command of the MASTER as specifically instructed by the host controller sending a required by the clock pulses generated by the MASTER. clear_faults command. A ‘bit’ indicator notifies the user if the Clock stretching: The ‘slave’ µController inside the power STATUS and ALARM registers changed since the last ‘read’ supply may initiate clock stretching if it is busy and it desires by the host controller. to delay the initiation of any further communications. During For example, if a voltage surge causes a momentary the clock stretch the ‘slave’ may keep the clock LO until it is shutdown for over voltage the power supply will ready to receive further instructions from the host controller. automatically restart if the ‘auto_restart’ feature is invoked. The maximum clock stretch interval is 25ms. During the momentary shutdown the power supply issues The host controller needs to recognize this clock stretching, an Alert# indicating to the system controller that a status and refrain from issuing the next clock signal, until the clock change has occurred. If the system controller reads back line is released, or it needs to delay the next clock pulse the STATUS and ALARM registers while the power supply is beyond the clock stretch interval of the power supply. shut down it will get the correct fault condition. However, inquiry of the state of the power supply after the restart Note that clock stretching can only be performed after event would indicate that the power supply is functioning th completion of transmission of the 9 ACK bit, the exception correctly. The STATUS and ALARM indicators did not freeze being the START command. at the original shutdown state and so the reason for the original Alert# is erased. The restart ‘bit’ would be set to indicate that an event has occurred. The power supply also clears the STATUS and ALARM registers after a successful read back of the information in these registers, with the exception of communications error alarms. This automated process improves communications efficiency since the host controller does not have to issue another clear_faults command to clear these registers. Clock 2 Dual, redundant buses: Two independent I C lines provide Stretch true communications bus redundancy and allow two Example waveforms showing clock stretching. independent controllers to sequentially control the power supply. For example, a short or an open connection in one of Communications speed: Both 100kHz and 400kHz clock 2 C lines does not affect communications capability on the I rates are supported. The power supplies default to the 2 the other I C line. Failure of a ‘master’ controller does not 100kHz clock rate. affect the power supplies and the second ‘master’ can take Packet Error Checking: The power supply will not respond over control at any time. to commands without the trailing PEC. The integrity of Using the PCA9541 multiplexer: Transition between the two communications is compromised if packet error correction 2 2 I C lines is provided by the PCA9541 I C/01 master selector is not employed. There are many functional features, multiplexer, which, upon start-up, connects channel 0. including turning OFF the main output, that require 2 Applications using only a single I C line can immediately validation to ensure that the correct command is executed. start talking across the bus without first requiring to PEC is a CRC-8 error-checking byte, based on the polynomial reconfigure the multiplexer. 8 2 C(x) = x + x + x + 1, in compliance with PMBus™ requirements. The calculation is based in all message bytes, including the originating write address and command bytes preceding read instructions. The PEC is appended to the message by the device that supplied the last byte. SMBusAlert#: The power supply can issue SMBAlert# driven from either its internal micro controller (µC) or from the 2 PCA9541 I C bus master selector. That is, the SMBAlert# signal of the internal µC funnels through the PCA9541 master selector that buffers the SMBAlert# signal and splits the signal to the two SMBAlert# signal pins exiting the power 2 Diagram showing the dual I C bus system. supply. In addition, the PCA9541 signals its own SMBAlert# Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Start Unit Address ACK request to either of the two SMBAlert# signals when required. 1 7 6 5 4 3 2 1 0 1 S 1 1 1 0 A2 A1 A0 0 A Non-supported commands: Non supported commands are flagged by setting the appropriate STATUS bit and issuing an SMBAlert# to the ‘host’ controller. Command Code ACK IE Register Stop Data out-of-range: The power supply validates data 8 1 8 settings and sets the data out-of-range bit and SMBAlert# if 0x00 A 0x0E P the data is not within acceptable range. SMBAlert# triggered by the µC: The µC driven SMBAlert# There are two independent interrupt enable (IE) registers, signal informs the ‘master/host’ controller that either a 2 2 one for each controller channel (I C-0 and I C-1). The STATE or ALARM change has occurred. Normally this signal interrupt register of each channel needs to be configured is HI. The signal will change to its LO level if the power 2 independently. That is, channel I C-0 cannot configure the IE supply has changed states and the signal will be latched LO 2 register of I C-1 or vise-versa. until the power supply receives a ‘clear’ instruction as This command has to be initiated to the PC9541 only once outlined below. If the alarm state is still present after the after application of power to the device. However, every ‘clear_faults’ command has been received, then the signal time a restart occurs the PCA9541 has to be reconfigured will revert back into its LO level again and will latch until a since its default state is to issue Alert# for changes to its subsequent ‘clear’ signal is received from the host controller. internal status. The signal will be triggered for any state change, including If the application did not configure the interrupt enable the following conditions; register the Alert# line can be cleared (de-activated), if it has been activated by the PCA9541, by reading back the data  VIN under or over voltage from the interrupt status registers (Istat).  Vout under or over voltage  IOUT over current Refer to the PCA9541 data sheet for further information on how to communicate to the PCA9541 multiplexer.  Over Temperature warning or fault  Fan Failure Please note that the PCA9541 does not support Packet Error  Communication error Checking (PEC).  PEC error 2 Re-initialization: The I C code is programmed to re-initialize  Invalid command if no activity is detected on the bus for 5 seconds. Re-  Internal faults 2 initialization is designed to guarantee that the I C µController does not hang up the bus. Although this rate is The power supply will clear the SMBusAlert# signal (release longer than the timing requirements specified in the SMBus the signal to its HI state) upon the following events: specification, it had to be extended in order to ensure that a  Completion of a ‘read_status’ instruction re-initialization would not occur under normal transmission  Receiving a CLEAR_FAULTS command rates. During the few µseconds required to accomplish re- 2  The main output recycled (turned OFF and then ON) via initialization the I C µController may not recognize a the ENABLE signal pin command sent to it. (i.e. a start condition).  The main output recycled (turned OFF and then ON) by Global broadcast: This is a powerful command because it can instruct all power supplies to respond simultaneously in the OPERATION command one command. But it does have a serious disadvantage. SMBAlert# triggered by the PCA9541: If clearing the Alert# Only a single power supply needs to pull down the ninth signal via the clear_faults or read back fails, then reading acknowledge bit. To be certain that each power supply back the Alert# status of the PCA9541 will be necessary responded to the global instruction, a READ instruction followed by clearing of the PCA9541 Alert#. should be executed to each power supply to verify that the The PCA9541 can issue an Alert# even when single bus command properly executed. The GLOBAL BROADCAST operation is selected where the bus master selector has not command should only be executed for write instructions to been used or addressed. This may occur because the slave devices. default state of the PCA9541/01 integrated circuit issues 2 Note: The PCA9541 i2c master selector does not respond to Alert# to both i C lines for all possible transitioning states of the GLOBAL BROADCAST command. the device. For example, a RESET caused by a glitch would cause the Alert# to be active. Read back delay: The power supply issues the SMBAlert # notification as soon as the first state change occurred. If the PCA9541 is not going to be used in a specific 2 During an event a number of different states can be application (such as when only a single I C line is utilized), transitioned to before the final event occurs. If a read back is it is imperative that interrupts from the PCA9541 are de- implemented rapidly by the host a successive SMBAlert# activated by the host controller. To de-activate the interrupt could be triggered by the transitioning state of the power registers the PCA9541 the ‘master’ needs to address the supply. In order to avoid successive SMBAlert# s and read PCA9541 in the ‘write’ mode, the interrupt enable (IE) back and also to avoid reading a transitioning state, it is register needs to be accessed and the interrupt masks have prudent to wait more than 2 seconds after the receipt of an to be set to HI ‘1’. (Note: do not mask bit 0 which transmits SMBAlert# before executing a read back. This delay will Alert# from the power supply). This command setting the ensure that only the final state of the power supply is interrupt enable register of the PCA9541 is shown below; captured. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W TM Successive read backs: Successive read backs to the power PMBus Command set: supply should not be attempted at intervals faster than Command Hex Data Function every one second. This time interval is sufficient for the Code Field internal processors to update their data base so that Operation 01 1 Output ON/OFF successive reads provide fresh data. Clear_Faults 03 0 Clear Status Device ID: Address bits A2, A1, A0 set the specific address of Vout_command 21 2 Set Vout the power supply. The least significant bit x (LSB) of the Vout_OV_fault_limit 40 2 Set OV fault limit address byte configures write [0] or read [1] events. In a Read_status D0 10 Read Status, V , I , T write command the system instructs the power supply. In a out out read command information is being accessed from the LEDs test ON D2 0 Test LEDs power supply. LEDs test OFF D3 0 Address Bit Service_LED_ON D4 0 Service LED 7 6 5 4 3 2 1 0 Service_LED_OFF D5 0 PCA9541 1 1 1 0 A2 A1 A0 R/W Micro controller 1 0 0 0 A2 A1 A0 R/W Enable_write D6 0 Enable EEPROM write External EEPROM 1 0 1 0 A2 A1 A0 R/W Disable_write D7 0 Disable EEPROM write Global Broadcast 0 0 0 0 0 0 0 0 Inhibit_restart D8 0 Latch upon failure MSB LSB Auto_restart D9 0 Hiccup Isolation_test DA 0 Perform isolation test The Global Broadcast instruction executes a simultaneous write instruction to all power supplies. A read instruction Read_input_string DC 3 Read Vin and Pin cannot be accessed globally. The three programmable Read_firmware_rev DD 3 Firmware revisions 2 address bits are the same for all I C accessible devices Read_run_timer DE 3 Accumulated ON state within the power supply. Fan_speed_set DF 2 Fan speed control TM PMBus Commands Fan_normal_speed E0 0 Stop fan control Read_fan_speed E1 4 Fan control & speed Standard instruction: Up to two bytes of data may follow Stretch_LO_25ms E2 0 Production test feature 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. Command Descriptions 1 8 1 8 1 Operation (01h) : By default the Power supply is turned ON S Slave address Wr A Command Code A at power up as long as ENABLE is active LO. The Operation command is used to turn the Power Supply ON or OFF via 8 1 8 1 8 1 1 the PMBus. The data byte below follows the OPERATION Low data byte A High data byte A PEC A P command. Master to Slave Slave to Master SMBUS annotations; S – Start , Wr – Write, Sr – re-Start, Rd – FUNCTION DATA BYTE Read, Unit ON 0x80 A – Acknowledge, NA – not-acknowledged, P – Stop Unit OFF 0x00 R Direct mode data format: The equation is y= [ mX+b ] x10 . In the equation, y is the data from the controller and x is the To RESET the power supply cycle the power supply OFF, wait ‘real’ value either being set or returned, except for V and IN at least 2 seconds, and then turn back ON. All alarms and Fan speed , x is the data from the controller and y is the shutdowns are cleared during a restart. ‘real’ value. Clear_faults (03h): This command clears information bits in For example, to set the output voltage to 50.45VDC, Multiply the STATUS registers, these include: the desired set point by the m constant, 50.45 x 400 =  Isolation OK 20,180. Convert this binary number to its hex equivalent:  Isolation test failed 20,180b = 0x4ED4. The result is sent LSB=0xD4 first, then  Restarted OK MSB=0x4E.  Invalid command FUNCTION Operation m b R  Invalid data Output voltage Write / read 400 0 0  PEC error Output voltage shutdown Vout_Command (21h) : This command is used to change Output Current read 5 0 0 Temperature read 1 0 0 the output voltage of the power supply. Changing the output Input Voltage read 25 3500 -2 voltage should be performed simultaneously to all power Fan Speed setting ( % ) read 1 0 0 supplies operating in parallel using the Global Address Fan speed in RPM read 100 0 0 (Broadcast) feature. If only a single power supply is instructed to change its output, it may attempt to source all the required power which can cause either a power limit or shutdown condition. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Software programming of output voltage overrides the set Status-2 point voltage configured during power_up. The program no Bit Title Description longer looks at the ‘margin pin’ and will not respond to any 7 PEC Error Mismatch between computed and hardware voltage setting. The default state cannot be transmitted PEC. The instruction has accessed any longer unless power is removed from the DSP. not been executed. Clear_Flags To properly hot-plug a power supply into a live backplane, resets this register. the system generated voltage should get re-configured into 6 Will Restart Restart after a shutdown = 1 either the factory adjusted firmware level or the voltage 5 Invalid Instruction The instruction is not supported. An level reconfigured by the margin pin. Otherwise, the voltage ALERT# will be issued. Clear_Flags resets this register. state of the plugged in power supply could be significantly 4 Power Capacity n/a different than the powered system. 3 Isolation test Information only to system controller Voltage margin range: 42V – 58 V . DC DC failed A voltage programming example: The task: set the output 2 Restarted ok Informs HOST that a successful RESTART occurred clearing the status voltage to 50.45VDC and alarm registers The constants for voltage programming are: m = 400, b and 1 Data out of range Flag appears until the data value is R = 0. Multiply the desired set point by the m constant, within range. A clear_flags 50.45 x 400 = 20,180. Convert this binary number to its hex command does not reset this register equivalent: 20,180b = 4ED4h. Transmit the data LSB first, until the data is within normal range. followed by MSB, 0 Enable pin HI State of the ENABLE pin, HI = 1 = OFF 0 x D44Eh. Vout_OV_fault_limit (40h) : This command sets the Output Isolation test failed: The ‘system controller’ has to Overvoltage Shutdown level. determine that sufficient capacity exists in the system to TM take a power supply ‘off line’ in order to test its isolation Manufacturer-Specific PMBus Commands capability. Since the power supply cannot determine Many of the manufacturer-specific commands read back whether sufficient redundancy is available, the results of this more than two bytes. If more than two bytes of data are test are provided, but the ‘internal fault’ flag is not set. TM returned, the standard SMBus Block read is utilized. In this process, the Master issues a Write command followed by Status-1 the data transfer from the power supply. The first byte of the Bit Title Description Block Read data field sends back in hex format the number 7 spare of data bytes, exclusive of the PEC number, that follows. 6 Isolation test OK Isolation test completed successfully. Analog data is always transmitted LSB followed by MSB. A 5 Internal fault The power supply is faulty No-ack following the PEC byte signifies that the transmission 4 Shutdown is complete and is being terminated by the ‘host’. 3 Service LED ON ON = 1 Read_status (D0h) : This ‘manufacturer specific’ command 2 External fault the power supply is functioning OK 1 LEDs flashing LEDs tested test ON = 1 is the basic read back returning STATUS and ALARM register 0 Output ON ON = 1 data, output voltage, output current, and internal temperature data in a single read. Alarm-2 1 8 1 8 1 Bit Title Description S Slave address Wr A Command Code A 7 Fan Fault 6 No primary No primary detected 1 8 1 8 1 5 Primary OT Primary section OT Sr Slave address Rd A Byte count = 9 A 4 DC/DC OT DC/DC section OT 3 Output voltage Internal regulation failure 8 1 8 1 8 1 lower than bus Status-2 A Status-1 A Alarm-2 A 2 Thermal sensor Internal failure of a temperature failed sensing circuit 8 1 8 1 8 1 1 5V out_of_limits Either OVP or OCP occurred Alarm-1 A Voltage LSB A Voltage MSB A 0 Power delivery a power delivery fault occurred 8 1 8 1 8 1 1 Power Delivery: The power supply compares its internal Current A Temperature A PEC NA P sourced current to the current requested by the current share pin. If the difference is > 10A, a fault is issued. Status and alarm registers The content and partitioning of these registers is significantly different than the standard register set in the PMBus™ specification. More information is provided by these registers and they are accessed rapidly, at once, using the ‘multi parameter’ read back scheme of this document. There are a total of four registers. All errors, 0 – normal, 1 – alarm. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Restart after a lachoff: To restart after a latch_off either of Alarm-1 four restart mechanisms are available. The hardware pin Bit Title Description Enable may be turned OFF and then ON. The unit may be 7 Unit in power limit An overload condition that results in commanded to restart via i2c through the Operation constant power command by first turning OFF then turning ON . The third 6 Primary fault Indicates either primary failure or way to restart is to remove and reinsert the unit. The fourth INPUT not present. Used in way is to turn OFF and then turn ON ac power to the unit. conjunction with bit-0 and Status_1 The fifth way is by changing firmware from latch off to bits 2 and 5 to assess the fault. restart. Each of these commands must keep the power 5 Over temp. One of the over_temperature supply in the OFF state for at least 2 seconds, with the shutdown sensors tripped the supply exception of changing to restart. 4 Over temp warning Temperature is too high, close to shutdown A successful restart shall clear all alarm registers, set the 3 In over current Shutdown is triggered by low restarted successful bit of the Status_2 register. output voltage < 39VDC. A power system that is comprised of a number of power 2 Over voltage supplies could have difficulty restarting after a shutdown shutdown 1 Vout out_of_limits Indication the output is not within event because of the non-synchronized behavior of the design limits. This condition may or individual power supplies. Implementing the latch-off may not cause an output shutdown. mechanism permits a synchronized restart that guarantees 0 Vin out_of_limits The input voltage is outside design the simultaneous restart of the entire system. limits A synchronous restart can be implemented by; 1. Issuing a GLOBAL OFF and then ON command to all LEDS test ON (D2h) : Will turn-ON simultaneously the four power supplies, front panel LEDs of the Power supply sequentially 7 seconds 2. Toggling Off and then ON the ENABLE signal ON and 2 seconds OFF until instructed to turn OFF. The 3. Removing and reapplying input commercial power to the intent of this function is to provide visual identification of the entire system. power supply being talked to and also to visually verify that The power supplies should be turned OFF for at least 20 – 30 the LEDs operate and driven properly by the micro seconds in order to discharge all internal bias supplies and controller. reset the soft start circuitry of the individual power supplies. LEDS test OFF (D3h) : Will turn-OFF simultaneously the four Auto_restart (D9h) : Auto-restart is the default front panel LEDs of the Power supply. configuration for overvoltage, overcurrent and Service LED ON (D4h) : Requests the power supply to flash- overtemperature shutdowns. ON the Service (ok-to-remove) LED. The flash sequence is However, overvoltage has a unique limitation. An approximately 0.5 seconds ON and 0.5 seconds OFF. overvoltage shutdown is followed by three attempted Service LED OFF (D5h) : Requests the power supply to turn restarts, each restart delayed 1 second, within a 1 minute OFF the Service (ok-to-remove) LED. window. If within the 1 minute window three attempted Enable write (D6h) : This command enables write restarts failed, the unit will latch OFF. If within the 1 minute permissions into the upper ¼ of memory locations for the less than 3 shutdowns occurred then the count for latch OFF external EEPROM. A write into these locations is normally resets and the 1 minute window starts all over again. 2 disabled until commanded through I C to permit writing into This command resets the power supply into the default the protected area. A delay of about 10ms is required from auto-restart configuration. the time the instruction is requested to the time that the Isolation test (DAh): This command verifies functioning of power supply actually completes the instruction. output OR’ing. At least two paralleled power supplies are See the FRU-ID section for further information of content required. The host should verify that N+1 redundancy is written into the EEPROM at the factory. established. If N+1 redundancy is not established the test Disable write (D7h) : This command disables write can fail. Only one power supply should be tested at a time. permissions into the upper ¼ of memory locations for the Verifying test completion should be delayed for external EEPROM. approximately 30 seconds to allow the power supply Unit in Power Limit or in Current Limit: When output sufficient time to properly execute the test. voltage is > 36VDC the Output LED will continue blinking. Failure of the isolation test is not considered a power supply When output voltage is < 36V , if the unit is in the RESTART DC FAULT because the N+1 redundancy requirement cannot be mode, it goes into a hiccup. When the unit is ON the output verified. The user must determine whether a true isolation LED is ON, when the unit is OFF the output LED is OFF. fault indeed exists. When the unit is in latched shutdown the output LED is OFF. Inhibit_restart (D8h) : The Inhibit-restart command directs the power supply to remain latched off for over_voltage, over_temperature and over_current. The command needs to be sent to the power supply only once. The power supply will remember the INHIBIT instruction as long as internal bias is active. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Read input string (DCh) : Reads back the input voltage and percentage, i.e. 100% = 0 x 64h. The command can only 6 input power consumed by the power supply. increase fan speed, it cannot instruct the power supply to reduce the fan speed below what the power supply requires for internal control. 1 7 1 1 8 Fan_normal_speed (E0h): This command returns fan 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 SSlave address Wr A Command 0xE1 A Read_firmware_rev [0 x DD]: Reads back the firmware 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. has been sent or invalid data has been received. Notification 2 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 Fault Management number 21 for the DSP indicates revision 2.1, and the number 14 for the i2c micro indicates revision 1.4. The power supply records faults in the STATUS and ALARM registers above and notifies the MASTER controller as Read_run_timer [0 x DE]: This command reads back the described in the Alarm Notification section of the non- recorded operational ON state of the power supply in hours. conforming event. The operational ON state is accumulated from the time the power supply is initially programmed at the factory. The The STATUS and ALARM registers are continuously updated power supply is in the operational ON state both when in with the latest event registered by the rectifier monitoring standby and when it delivers main output power. Recorded circuits. A host responding to an SMBusALERT# signal may capacity is approximately 10 years of operational state. receive a different state of the rectifier if the state has changed from the time the SMBusALERT# has been triggered by the rectifier. 1 7 1 1 8 1 S Slave address Wr A Command Code 0xDE A The power supply differentiates between internal faults that are within the power supply and external faults that 1 7 1 1 8 1 the power supply protects itself from, such as overload or Sr Slave Address Rd A Byte count = 4 A input voltage out of limits. The FAULT LED, FAULT PIN or i2c alarm is not asserted for EXTERNAL FAULTS. Every attempt is 8 1 8 1 8 1 made to annunciate External Faults. Some of these Time - LSB A Time A Time - MSB A annunciations can be observed by looking at the input LEDs. These fault categorizations are predictive in nature and 8 1 1 therefore there is a likelihood that a categorization may not PEC No-ack P have been made correctly. Input voltage out of range: The Input LED will continue Fan_speed_set (DFh) : This command instructs the power blinking as long as sufficient power is available to power the supply to increase the speed of the fan. The transmitted LED. If the input voltage is completely gone the Input LED is data byte represents the hex equivalent of the duty cycle in OFF. 6 Input power consumption is not supported by the PEM in order to improve efficiency. The returned value is 00. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W State Change Definition External EEPROM 2 A state_change is an indication that an event has occurred A 64k-bit EEPROM is provided across the I C bus. This that the MASTER should be aware of. The following events EEPROM is used for both storing FRU_ID information and for shall trigger a state_change; providing a scratchpad memory function for customer use. Functionally the EEPROM is equivalent to the ST M34D64  Initial power-up of the system when AC gets part that has its memory partitioned into a write protected turned ON . This is the indication from the rectifier upper ¼ of memory space and the lower ¾ section that that it has been turned ON. Note that the master cannot be protected. FRU_ID is written into the write needs to read the status of each power supply to reset the system_interrupt. If the power supply is protected portion of memory. back-biased through the 8V_INT or the 5VSTB it Write protect feature: Writing into the upper 1/4 of will not issue an SMBALERT# when AC power is memory can be accomplished either by hardware or turned back ON. software. The power supply pulls down the write_protect (Wp) pin to  Whenever the power supply gets hot-plugged into ground via a 500Ω resistor between the ‘module_present’ a working system. This is the indicator to the signal pin and Logic_GRD (see the Module Present Signal system (MASTER) that a new power supply is on section of Input Signals). Writing into the upper ¼ of line. memory can be accomplished by pulling HI the module_present pin.  Any changes in the bit patterns of the STATUS and An alternative, and the recommended approach, is to issue ALARM registers are a STATUS change which the Enable_write command via software. triggers the SMBALERT# flag. Note that a host- Page implementation: The external EEPROM is partitioned issued command such as CLEAR_FAULTS will not into 32 byte pages. For a write operation only the starting trigger an SMB address is required. The device automatically increments the memory address for each byte of additional data it Hot plug procedures receives. However, if the 32 byte limit is exceeded the device executes a wrap-around that will start rewriting from Careful system control is recommended when hot plugging the first address specified. Thus byte 33 will replace the first a power supply into a live system. It takes about 15 seconds byte written, byte 34 the second byte and so on. One needs for a power supply to configure its address on the bus based to be careful therefore not to exceed the 32 byte page on the analog voltage levels present on the backplane. If limitation of the device. 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 be told which power supply is to be removed. The controller turns the service LED ON, thus informing the installer that the identified power supply can be removed from the system. The system controller should then 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. The goal is to identify problems early before a protective shutdown would occur that would take the power supply out of service. Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Alarm Table Monitoring Signals Power Supply LED State (Referenced to Logic_GRD) IN OK DC OK Service Fault Power Module Condition Green Green Amber Red Fault OTW OK I_Limit Present OK 1 1 0 0 HI HI HI HI LO Thermal Alarm HI 1 1 1 0 HI LO HI LO (5C before shutdown) Thermal Shutdown 1 0 1 1 LO LO LO HI LO Defective Fan 1 0 0 1 LO HI LO HI LO Blown Input Fuse in Unit 1 0 0 1 LO HI LO HI LO 2 No Input > 8mS (single unit) 0 1 0 0 HI HI LO HI LO Input Present but not within limits 0 0 0 0 HI HI LO HI LO Input not present (with back bias) 0 0 0 0 HI HI LO HI LO Over Voltage Latched Shutdown 1 0 0 1 LO HI LO HI LO Over Current 1 Blinks 0 0 HI HI LO LO LO Over Current Shutdown 1 0 0 0 HI HI LO LO LO 1 Non-catastrophic Internal Failure 1 1 0 1 LO HI HI HI LO 1 Missing Module (external pull-up) HI Standby (remote) 1 0 0 0 HI HI LO HI LO 2 Service Request (i C mode) 1 1 Blinks 0 HI HI HI HI LO 1 Any detectable fault condition that does not result in the power supply shutting down. For example, ORing FET failure, boost section out of regulation, etc. 2 Signal transition from HI to LO is output load dependent Output Connector Mating Connector: AMP 1450572-1 A1 A6P7 P1 Signal Output Power Input Power 6 5 4 3 2 1 P7 P6 P5 P4 P3 P2 P1 A SCL_0 MOD_PRES Ilimit LOGIC_GRD RS 485+ UNIT_ADDR Alert#_ B SCL_1 OTW Alert#_1 RS 485- 8V_INT V_OUT V_OUT CO_RTN EARTH CO_LINE 0 (-DC) (+DC) Vin ( + ) (GND) Vin ( - ) C SDA_0 Margin Enable Reset Ishare N/C D SDA_1 Fault 5VA Power_OK ON/OFF SHELF_ADDR Connector is viewed from the rear positioned inside the power supply. Signal pins columns 1 and 2 are referenced to V_OUT (-DC). Signal pins columns 3 through 6 are referenced to Logic GRD. Last-to-make first-to-break pins. First-to-make last-to-break longest pin implemented in the mating connector. N/C – no connect pins must be left open. Do not connect these pins to either voltage sources or ground. April 8, 2018 ©2012 General Electric Company. All rights reserved. Page 13 Data Sheet GE CP2500DC54PE series 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 Critical Power representative for more details. Function Label Type Description 2 Output Enable Enable 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. ON/OFF ON/OFF 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. April 8, 2018 ©2012 General Electric Company. All rights reserved. Page 14 Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Front Panel LEDs 2 Analog Mode I C Mode ON: Input ok OFF: Input out of limits ON: Output ok Blinking: Overload ON: Over-temperature Warning Over-temperature Warning Blinking: Service ON: Fault ! Dimensions 13.85 in. (351.2 mm) Rear View 4.00 in. (101.6 mm) 1.63 in. (41.4 mm) Top View Front View April 8, 2018 ©2012 General Electric Company. All rights reserved. Page 15 Data Sheet GE CP2500DC54PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2500W; 5Vdc @ 4W Ordering Information Item Description Comcode CP2500DC54PEZ Factory tested to IEEE802.3af POE compliance, 5Vdcaux at 0.75A. CC109170528 CP2500DC54PEZ-B Same as above with a black faceplate 150037801 Accessories Item Description Comcode Power supply interface board 150037483 Isolated Interface Adapter Kit – interface between a USB port 150036482 2 and the I C connector on the power supply interface board Graphical User Interface download demonstrating the 2 redundant I C capabilities of the power supply. The site below downloads the GE Digital Power Insight™ software tools, including the cpgui_l. When the download is complete, icons for the various utilities will appear on the desktop. Click on cpgui_l.exe to start the program after the download is complete. http://apps.geindustrial.com/publibrary/checkout/Software%7 CCPSW-DPI%7Cgeneric Graphical User Interface Manual; The GUI download created a directory In that directory start the DPI_manual.pdf file. 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 http://www.geindustrial.com/products/critical-power 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. April 8, 2018 ©2014 General Electric Company. All International rights reserved. Page 16