GE Industrial Solutions CAR2548FP series - Manual (Page 12)

GE Data Sheet
CAR2548FP series rectifier
Input: 90Vac to 264Vac; Output: 48Vdc @ 2500W; 3.3Vdc or 5 Vdc @ 1A
March 28, 2013 ©2013 General Electric Company. All rights reserved. Page 12
for latch OFF resets and the 1 minute window starts all over
again.
Vin_UV_warn_limit (58): This is another warning flag
indicating that the input voltage is decreasing dangerously
close to the low input voltage shutdown level.
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.
If a non-supported read is requested the power supply will
return all 0x00h.
Restart after a lachoff: To restart after a latch_off either of
four restart mechanisms are available. The hardware pin
Remote ON/OFF may be turned OFF and then ON. The unit
may be commanded to restart via i2c through the Operation
command by first turning OFF then turning ON . The third way
to restart is to remove and reinsert the unit. The fourth way is
to turn OFF and then turn ON ac power to the unit. The fifth
way is by changing firmware from latch off to restart. Each
of these commands must keep the power supply in the OFF
state for at least 2 seconds, with the exception of changing to
restart.
A successful restart shall clear all alarm registers.
A power system that is comprised of a number of power
supplies could have difficulty restarting after a shutdown
event because of the non-synchronized behavior of the
individual power supplies. Implementing the latch-off
mechanism permits a synchronized restart that guarantees
the simultaneous restart of the entire system.
A synchronous restart can be implemented by;
1. Issuing a GLOBAL OFF and then ON command to all power
supplies,
2. Toggling Off and then ON the Remote ON/OFF signal
3. Removing and reapplying input commercial power to the
entire system.
It is good practice to turn OFF the power supplies for about
20 – 30 seconds in order to discharge all internal bias supplies
and reset the soft start circuitry of the individual power
supplies.
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_Vout ± 2%
Read_Iout ± 4% of FL
Read_temperature ± 5C
Read_Pout ±5%
EEPROM
The microcontroller has 96 bytes of EEPROM memory
available for the system host.
Another separate EEPROM IC will provide another 128 bytes
of memory with write protect feature. Minimum information
to be included in this separate EEPROM: model number,
revision, date code, serial number etc.
LEDs
Three LEDs are located on the front faceplate. The
AC_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.
When the DC_OK LED is GREEN the DC output is
present.
When the FAULT_LED is RED then a fault condition exists
and the power supply may not provide output power. The
table below further defines these states: