GE Industrial Solutions CAR0812DC Series - Manual (Page 14)

GE Data Sheet
CAR0812DC Series DC-DC Converter
Input: -36V
DC
to -75V
DC
; Output: +12 V
DC
@ 850W; 3.3V
DC
or 5 V
DC
@ 1A
April 23, 2013 ©2013 General Electric Company. All rights reserved. Page 14
Status_word (79): returns two bytes of information. The upper
byte bit functionality is tabulated in the Status_word section.
The lower byte bit functionality is identical to Status_byte.
Fan_speed (D7): This register can be used to ‘read’ the fan
speed in adjustment percent (0 – 100%) or set the fan speed in
adjustment percent (0 – 100%). The speed of the fan cannot
be reduced below what the power supply requires for its
operation. The register value is the percent number, it is not in
linear format.
Invalid commands or data: The power supply notifies the
MASTER if a non-supported command has been sent or invalid
data has been received. Notification is implemented by setting
the appropriate STATUS and ALARM registers and setting the
SMBAlert# flag.
Control and Read accuracy:
The estimates below are believed to be reasonable under most
operating conditions. However, these are typical numbers and
not hard bound values that cannot be exceeded. In most
nominal operating conditions the returned values are
significantly better than these estimates.
FUNCTION ACCURACY
Vout_command ± 2%
Vout_OV_fault_limit ± 3%
Iout_OC_warn_limit ± 4% of FL
OT_warn_limit ± 5C
Vin_UV_warn_limit ± 3%
Vin_UV_fault_limit ± 3%
Read_Vin ± 3%
Read_Vout ± 2%
Read_Iout ± 4% of FL
Read_temperature ± 5C
EEPROM
The microcontroller has 96 bytes of EEPROM memory available
for the system host.
A separate EEPROM IC, with write protect features, provides
another 128 bytes of memory. Minimum information to be
included in this separate EEPROM: model number, revision,
date code, serial number etc.
LEDs
Two LEDs are located on the front faceplate. The INPUT OK LED
provides visual indication of the INPUT signal function. When
the LED is ON GREEN the power supply input is within normal
design limits.
The second LED DC/FLT provides visual indication of three
different states of the power supply. When the LED is GREEN
then there are no faults and the DC output is present. When
the LED is AMBER then a fault condition exists but the power
supply still provides output power. When the LED is RED then a
fault condition exists and the power supply does not provide
output power.
Alarm/LED indicator Table
Test Condition
LED Indicator Monitoring Signals
LED1
INPUT OK
Tri-Color LED2
DC OK FAULT DC OK INPUT OK TEMP OK
1 Normal Operation Green Green High High High High
2 Low or NO INPUT Off Red Low Low Low High
3 OVP Green Red Low Low High High
4 Over Current Green Red Low Low High High
5 Temp Alarm Warning Green Orange High High High Low
6 Fault Over Temp Green Red Low Low High Low
7 Remote ON/OFF Green Red Low Low High High
Note: Test condition #2 had 2 modules plug in. One module is running and the other one is with no Input.