GE Industrial Solutions CP2725AC54TE - Manual (Page 14)

GE
Data Sheet
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277V
AC
input; Default Outputs: ±54V
DC
@ 2725W, 5V
DC
@ 4W
January 30, 2014 ©2013 General Electric Company. All rights reserved. Page 14
Alarm-1
Bit Title Description
7 Unit in power limit An overload condition that results in
constant power
6 Primary fault Indicates either primary failure or
INPUT not present. Used in
conjunction with bit-0 and Status_1
bits 2 and 5 to assess the fault.
5 Over temp.
shutdown
One of the over_temperature
sensors tripped the supply
4 Over temp warning Temperature is too high, close to
shutdown
3 In over current Shutdown is triggered by low
output voltage < 39V
DC
.
2 Over voltage
shutdown
1 Vout out_of_limits Indication the output is not within
design limits. This condition may or
may not cause an output shutdown.
0 Vin out_of_limits The input voltage is outside design
limits
LEDS test ON (D2h) :
Will turn-ON simultaneously the four
front panel LEDs of the Power supply sequentially 7 seconds
ON and 2 seconds OFF until instructed to turn OFF. The intent
of this function is to provide visual identification of the power
supply being talked to and also to visually verify that the LEDs
operate and driven properly by the micro controller
.
LEDS test OFF (D3h) : Will turn-OFF simultaneously the four
front panel LEDs of the Power supply.
Service LED ON (D4h) : Requests the power supply to flash-ON
the Service (ok-to-remove) LED. The flash sequence is
approximately 0.5 seconds ON and 0.5 seconds OFF.
Service LED OFF (D5h) : Requests the power supply to turn OFF
the Service (ok-to-remove) LED.
Enable write (D6h) : This command enables write permissions
into the upper ¼ of memory locations for the external
EEPROM. A write into these locations is normally disabled until
commanded through I
2 C to permit writing into the protected
area. A delay of about 10ms is required from the time the
instruction is requested to the time that the power supply
actually completes the instruction.
See the FRU-ID section for further information of content
written into the EEPROM at the factory.
Disable write (D7h) : This command disables write permissions
into the upper ¼ of memory locations for the external
EEPROM.
Unit in Power Limit or in Current Limit: When output voltage
is > 36V
DC
the Output LED will continue blinking.
When output voltage is < 36V
DC
, if the unit is in the RESTART
mode, it goes into a hiccup. When the unit is ON the output
LED is ON, when the unit is OFF the output LED is OFF.
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.
Restart after a lachoff: To restart after a latch_off either of
four restart mechanisms are available. The hardware pin
Enable 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, set the
restarted successful bit of the Status_2 register.
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 ENABLE signal
3. Removing and reapplying input commercial power to the
entire system.
The power supplies should be turned OFF for at least 20 – 30
seconds in order to discharge all internal bias supplies and
reset the soft start circuitry of the individual power supplies.
Auto_restart (D9h) : Auto-restart is the default configuration
for overvoltage, overcurrent and overtemperature shutdowns.
However, overvoltage has a unique limitation. An overvoltage
shutdown is followed by three attempted restarts, each restart
delayed 1 second, within a 1 minute window. If within the 1
minute window three attempted restarts failed, the unit will
latch OFF. If within the 1 minute less than 3 shutdowns
occurred then the count for latch OFF resets and the 1 minute
window starts all over again.
This command resets the power supply into the default auto-
restart configuration.
Isolation test (DAh): This command verifies functioning of
output OR’ing. At least two paralleled power supplies are
required. The host should verify that N+1 redundancy is
established. If N+1 redundancy is not established the test can
fail. Only one power supply should be tested at a time.
Verifying test completion should be delayed for approximately
30 seconds to allow the power supply sufficient time to
properly execute the test.
Failure of the isolation test is not considered a power supply
FAULT because the N+1 redundancy requirement cannot be
verified. The user must determine whether a true isolation fault
indeed exists.