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PAC2000S12-B1 PSU
Table 9-7 OPOK# signal characteristics
Signal Characteristics
Signal type: Detects whether the PSU
MV12 output is normal.
OPOK# = High
OPOK# = Low
Table 9-8 OPOK# output
OPOK# Output
Low level voltage
High level voltage
Source current, OPOK# = Low
Source current, OPOK# = High
Signal rise and fall time
NO TE
1. If the INSTALLED# signal is at high level, then the OPOK# signal is at low level.
2. In MV12 mode:
1. V
> 11.5 V, OPOK# is at high level
out
2. V
< 11.4 V, OPOK# is at low level
out
3. The time from when OPOK# drops to 1.43 V to when the PSU 12 V bus voltage drops to 9.5 V is greater
than 100 μs. (Input power failure, input overvoltage/undervoltage, fan fault, overtemperature, and
output undervoltage should meet the requirements. There is no requirement for output overcurrent,
output short circuit, and output overvoltage.)
3. In MV6 mode:
1. V
> 5.9 V, OPOK# is at high level
out
2. V
< 5.8 V, OPOK# is at low level
out
4. In case of input power failure, input overvoltage, input undervoltage, fan fault, overtemperature protection,
and output undervoltage, the PSU can report the OPOK# fault.
5. After the PSU input is powered off, OPOK# is at low level. Before the PSU input recovers, OPOK# cannot be
at high level.
Technical Manual
PSU side: OD gate; the signal is pulled up to 3.3 V
auxiliary power supply inside the PSU by a 1-kilohm
(reference value) resistor or the DSP outputs the signal
directly through a series resistor.
System side: This signal is pulled down to GND through a
100-kilohm (reference value) resistor. A 100-ohm
(reference value) series resistor is connected to the
system CPLD.
The MV12 output is normal.
The MV12 output is abnormal.
Min.
0 V
2.200 V
-
-
-
9 Control Functions
Max.
0.6 V
3.465 V
4 mA
4 mA
200 μs
37
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