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CP2000DC54PEZ Datasheet(PDF) 5 Page - Lineage Power Corporation |
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CP2000DC54PEZ Datasheet(HTML) 5 Page - Lineage Power Corporation |
5 / 15 page GE Data Sheet CP2000DC54-PE series dc-dc converter Input: -40Vdc to -72Vdc; Outputs: ±54Vdc @ 2000W; 5Vdc @ 4W August 20, 2013 ©2013 General Electric Company. All rights reserved. Page 5 Status and Control The PEM provides two means for monitor/control: analog or I2C. Details of analog controls are provided in this data sheet under Signal Definitions. GE Energy will provide separate application notes on the I2C protocol for users to interface to the CPL PEMs. Contact your local GE Energy representative for details. Hot Plug When rapidly extracting and reinserting modules care should be taken to allow for discharging the internal bias supply so that a predictable restart could be achieved. The way to ensure that the circuit sufficiently discharges is to observe the spinning of the fans after an extraction. The unit should not be reinserted until the fans stop spinning. Without bleeding down internal bias the module may remember its last assigned address and may not configure itself properly if reinserted into another slot. Control Definitions All signals are referenced to Logic_GRD unless otherwise noted. See the Signal Definitions Table at the end of this document for further description of all the signals. Control Signals Margining: Set point of the PEM can be changed via this input pin. Programming can be either a voltage source or a resistance divider. The margining pin is connected to 3.3Vdc via a 10kΩ resistor inside the PEM. See graphs below. -58 -46 0.1 3.3Vdc Vcontrol -44 0 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. Module Present Signal: This signal has dual functionality. It can 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 external pull-up should not raise the voltage on the pin above 0.25Vdc. Above 1Vdc, the write_protect feature of the EEPROM is enabled. Protocol Select: Establishes the communications mode of the power supply, between analog/I2C and RS485 modes. For RS485, connect 10kΩ pull-down resistor to 54_OUT(-DC). Enable: On/Off control when I2C communications are utilized as configured by the Protocol pin. This pin must be pulled low to turn ON the power supply. The power supply will turn OFF if either the Enable or the ON/OFF pin is released. This signal is referenced to Logic_GRD. ON/OFF: This is a short pin utilized for hot-plug applications to ensure that the power supply turns OFF before the power pins are disengaged. It also ensures that the power supply turns ON only after the power pins have been engaged. Must be connected to V_OUT (-DC). Status Signals Power_OK: This signal is HI when the main output is present and goes LO when the main output is not present. I_limit: This signal is HI when the main output is not in current limit and goes LO when current limit has activated. Alert #: I2C interrupt signal. Fault: This signal goes LO for any failure that requires PEM replacement. Some of these faults may be due to: Fan failure Over-temperature condition Over-temperature shutdown Over-voltage shutdown Internal PEM Fault |
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