GE Industrial Solutions CAR2912TE series - Manual (Page 13)

GE
Preliminary Data Sheet
CAR2912TE series front-end
Input: 90Vac to 264Vac; Output: 12Vdc @ 2900W; 3.3 or 5Vdc @ 4A Standby
October 21, 2013 ©2013 General Electric Company. All rights reserved. Page 13
configuration looking at the Vprog signal for output voltage
control. In many applications, the Vprog pin is used for
setting initial conditions, if different that the factory setting.
Software programming then takes over once I 2 C
communications are established.
To properly hot-plug a power supply into a live backplane, the
system generated voltage should get re-configured into
either the factory adjusted firmware level or the voltage level
reconfigured by the Vprog pin. Otherwise, the voltage state
of the plugged in power supply could be significantly different
than the powered system.
Voltage margin range: 10.8Vdc – 13.2 Vdc.
Vin_ON (0x35): This is a ‘read only’ register that informs the
controller at what input voltage level the power supply turns
ON. The default value is tabulated in the data section. The
value is contingent on whether the power supply operates in
the low_line or high_line mode.
Vin_OFF (0x36): This is a ‘read only’ register that informs the
controller at what input voltage level the power supply turns
OFF. The default value is tabulated in the data section. The
value is contingent on whether the power supply operates in
the low_line or high_line mode.
Fan_config_1_2 (0x3A) : This command allows the controller
to define whether the fan speed command is in duty cycle or
RPM. Both fans must be commanded simultaneously, either
by duty cycle or RPM. Mixing controls will result in a ‘data
error’. The tachometer pulses per revolution is not used.
Fan_command_1 (0x3B): This command instructs the power
supply to increase the speed of the fan. The transmitted data
byte represents the hex equivalent of the duty cycle in
percentage, i.e. 100% = 0 x 64h. The command can only
increase fan speed, it cannot instruct the power supply to
reduce the fan speed below what the power supply requires
for internal control.
Sending 00h tells the power supply to revert back to its
internal control.
Fan_command_2 (0x3C): not used in this power supply.
Issuing this command will result in ‘invalid command’.
Vout_OV_fault_limit (0x40):
Sets the value at which the main
output voltage will shut down. The default OV_fault value is
set at 60Vdc. This level can be permanently changed and
stored in non-volatile memory.
Vout_OV_fault_response (0x41):
This is a ‘read only’ register.
The only allowable state is a latched state after three retry
attempts.
An overvoltage shutdown is followed by three attempted
restarts, each successive restart delayed 1 second. If within a
1 minute window three attempted restarts failed, the unit will
latch OFF. If less than 3 shutdowns occur within the 1 minute
window then the count for latch OFF resets and the 1 minute
window starts all over again. This performance cannot be
changed.
Restart after a latched state: Either of four restart
mechanisms is available;
•
The hardware pin Remote ON/OFF may be cycled 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.
A successful restart clears all STATUS and 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;
•
Issuing a GLOBAL OFF and then a GLOBAL ON command
to all power supplies
• Toggling Off and then ON the Remote ON/OFF signal, if
this signal is paralleled among the power supplies.
• Removing and reapplying input commercial power to the
entire system.
The power supplies should be 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.
Vout_OV_warn_limit (0x42):
Sets the value at which a
warning will be issued that the output voltage is too high. The
default OV_warn limit is set at 56Vdc. Exceeding the warning
value will set the Alert# signal. This level can be permanently
changed and stored in non-volatile memory.
Vout_UV_warn_limit (0x43):
Sets the value at which a
warning will be issued that the output voltage is too low. The
default UV_warning limit is set at 41Vdc. Reduction below the
warning value will set the Alert# signal. This level can be
permanently changed and stored in non-volatile memory.
Vout_UV_fault_limit (0x44): Sets the value at which the
power supply will shut down if the output gets below this
level. The default UV_fault limit is set at 39Vdc. This register is
masked if the UV is caused by interruption of the input
voltage to the power supply. This level can be permanently
changed and stored in non-volatile memory.
Vout_UV_fault_response (0x45): Sets the response if the
output voltage falls below the UV_fault_limit. The default
UV_fault_response is restart (0xC0). The only two allowable
states are latched (0x80) and restart (0xC0). The default
response state can be permanently changed and stored in
non-volatile memory.