Data Sheet
GE
CP2725AC54TE CPL High Efficiency Rectifier
100-120/200-277VAC input; Default Outputs: ±54VDC @ 2725W, 5VDC @ 4W
Status and alarm registers
Invalid data
PEC error
The content and partitioning of these registers is significantly
different than the standard register set in the PMBus™
specification. More information is provided by these registers
and they are accessed rapidly, at once, using the ‘multi
parameter’ read back scheme of this document. There are a
total of four registers. All errors, 0 – normal, 1 – alarm.
Vout_Command (21h) : 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.
Status-2
Bit
7
Title
PEC Error
Description
Software programming of output voltage overrides the set
point voltage configured during power_up. The program no
longer looks at the ‘margin pin’ and will not respond to any
hardware voltage setting. The default state cannot be
accessed any longer unless power is removed from the DSP.
Mismatch between computed and
transmitted PEC. The instruction has
not been executed. Clear_Flags
resets this register.
6
5
Will Restart
Invalid Instruction
Restart after a shutdown = 1
The instruction is not supported. An
ALERT# will be issued. Clear_Flags
resets this register.
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.
4
3
Power Capacity
Isolation test
failed
High line power capacity = 1
Information only to system controller
2
1
Restarted ok
Informs HOST that a successful
RESTART occurred clearing the status
and alarm registers
Flag appears until the data value is
within range. A clear_flags
command does not reset this register
until the data is within normal range.
State of the ENABLE pin, HI = 1 = OFF
Voltage margin range: 42VDC – 58 VDC
.
A voltage programming example: The task: set the output
voltage to 50.45VDC
Data out of range
Enable pin HI
The constants for voltage programming are: m = 400, b and R
= 0. Multiply the desired set point by the m constant, 50.45 x
400 = 20,180. Convert this binary number to its hex equivalent:
20,180b = 4ED4h. Transmit the data LSB first, followed by MSB,
0 x D44Eh.
0
Isolation test failed: The ‘system controller’ has to determine
that sufficient capacity exists in the system to take a power
supply ‘off line’ in order to test its isolation capability. Since the
power supply cannot determine whether sufficient redundancy
is available, the results of this test are provided, but the
‘internal fault’ flag is not set.
Vout_OV_fault_limit (40h) : This command sets the Output
Overvoltage Shutdown level.
Manufacturer-Specific PMBusTM Commands
Many of the manufacturer-specific commands read back more
than two bytes. If more than two bytes of data are returned,
the standard SMBusTM Block read is utilized. In this process, the
Master issues a Write command followed by the data transfer
from the power supply. The first byte of the Block Read data
field sends back in hex format the number of data bytes,
exclusive of the PEC number, that follows. Analog data is
always transmitted LSB followed by MSB. A No-ack following
the PEC byte signifies that the transmission is complete and is
being terminated by the ‘host’.
Status-1
Bit
7
Title
Description
spare
6
5
4
Isolation test OK
Internal fault
Shutdown
Isolation test completed successfully.
The power supply is faulty
3
2
1
0
Service LED ON
External fault
LEDs flashing
Output ON
ON = 1
the power supply is functioning OK
LEDs tested test ON = 1
ON = 1
Read_status (D0h) : This ‘manufacturer specific’ command is
the basic read back returning STATUS and ALARM register
data, output voltage, output current, and internal temperature
data in a single read.
Alarm-2
Bit
7
Title
Fan Fault
Description
1
S
8
1
A
8
1
A
Slave address Wr
Command Code
6
5
4
No primary
Primary OT
DC/DC OT
No primary detected
Primary section OT
DC/DC section OT
1
8
1
A
8
1
A
Sr Slave address Rd
Byte count = 9
3
Output voltage
lower than bus
Thermal sensor
failed
Internal regulation failure
8
1
A
8
1
A
8
1
A
2
Internal failure of a temperature
sensing circuit
Status-2
Status-1
Alarm-2
1
0
5V out_of_limits
Power delivery
Either OVP or OCP occurred
a power delivery fault occurred
8
1
A
8
1
A
8
1
A
Alarm-1
Voltage LSB
Voltage MSB
Power Delivery: The power supply compares its internal
sourced current to the current requested by the current share
pin. If the difference is > 10A, a fault is issued.
8
1
A
8
1
A
8
1
1
P
Current
Temperature
PEC NA
January 30, 2014
©2013 General Electric Company. All rights reserved.
Page 13
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
