Preliminary Data Sheet
GE
CAR2512TE Front-End
Input: 90VAC to 264VAC; Output: 12 VDC @ 2500W; 3.3/5VDC standby @ 15W
Operation command is used to turn the Power Supply ON or
OFF via the PMBus. The data byte below follows the
OPERATION command.
Register
Code Bit
Function
7
6
5
4
OV Fault/Warning detected
OC Fault/Warning detected
Input Fault/Warning detected
Mfr_specific register change
detected
FUNCTION
Unit ON
DATA BYTE
80
00
Unit OFF
Status_word
(includes Status_byte)
79
3
nPower_Good
2
Fan Fault or Warning
detected
Other fault
Unknown
Vout OV Fault
Vout OV Warning
Vout UV Warning
Vout UV Fault
N/A
N/A
N/A
N/A
IOUT OC Fault
To RESET the power supply cycle the power supply OFF, wait at
least 2 seconds, and then turn back ON. All alarms and
shutdowns are cleared during a restart.
1
0
7
6
5
Clear_faults (03): This command clears all STATUS and FAULT
registers and resets the SMBAlert# line.
If a fault still persists after the issuance of the clear_faults
command the specific registers indicating the fault are reset
and the SMBAlert# line is activated again.
4
3
Status_Vout
Status_Iout
7A
2
1
0
7
6
5
WRITE_PROTECT register (10): Used to control writing to the
PMBus device. The intent of this command is to provide
protection against accidental changes. All supported
command parameters may have their parameters read,
regardless of the write_protect settings. The contents of this
register can be stored to non-volatile memory using the
Store_default_code command. The default setting of this
register is disable_all_writes except write_protect 0x80h.
N/A
IOUT OC Warning
N/A
N/A
N/A
N/A
N/A
Vin OV Fault
Vin OV Warning
Vin UV Warning
Vin UV Fault
N/A
4
3
7B
2
1
0
7
6
5
FUNCTION
DATA BYTE
Enable all writes
00
80
40
Disable all writes except write_protect
Disable all writes except write_protect and
OPERATION
4
3
Status_input
7C
Vout_Command (21) : This command is used to change the
output voltage of the power supply. Changing the output
voltage should be performed simultaneously to all power
supplies operating in parallel using the Global Address
(Broadcast) feature. If only a single power supply is instructed
to change its output, it may attempt to source all the required
power which can cause either a power limit or shutdown
condition.
2
1
0
7
6
5
N/A
N/A
N/A
OT Fault
OT Warning
N/A
N/A
N/A
N/A
N/A
N /A
Fan 1 Fault
Fan 2 Fault
N/A
4
3
Status_temperature
7D
2
1
0
7
6
5
Software programming of output voltage permanently
overrides the set point voltage configured by the Vprog signal
pin. The program no longer looks at the ‘Vprog pin’ and will not
respond to any hardware voltage settings. If power is removed
from the µController it will reset itself into its default
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 I2C communications are
established.
4
3
N/A
Status_fan_1_2
81
Fan 1 Speed Overridden
Fan 2 Speed Overridden
N/A
N/A
3.3V_fault
2
1
0
7
6
5
4
3
2
1
0
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 margin pin. Otherwise, the voltage state
of the plugged in power supply could be significantly different
than the powered system.
OVSD
Interrupt
Fault detected
PS_remote_OFF
DC Fault
Input Fault
0 – AC high line,
1 – AC low line
Status_mfr_specific
80
Vout_OV_warn_limit (42): OV_warning is extremely useful
because it gives the system controller a heads up that the
output voltage is drifting out of regulation and the power
supply is close to shutting down. Pre-amative action may be
taken before the power supply would shut down and
potentially disable the system.
Command Descriptions
Operation (01) : By default the Power supply is turned ON at
power up as long as Power ON/OFF signal pin is active HI. The
February 7, 2014
©2013 General Electric Company. All rights reserved.
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