Cyc_Pwr; I_Mon - Huawei PAC3000S12-T1 PSU Technical Manual

PAC3000S12-T1 PSU

9.10 CYC_PWR

The CYC_PWR signal is sent to PSUs by the system to shut down or restore the 12 V main output of
the PSU.
● The signal is valid if the CYC_PWR signal is at low level for 100–150 ms. The PSU shuts down
after the delay time (configurable) and then starts after the restart time (configurable).
● The CYC_PWR signal is invalid if both the OPOK and CYC_PWR signals are low level.
● The signal is invalid if the CYC_PWR signal is at low level for less than 100 ms.
● The CYC_PWR signal is invalid when a PSU is during delay shutdown or restarting. The
CYC_PWR signal is valid after the OPOK signal becomes high level.
Table 9-14 CYC_PWR signal characteristics
Signal Characteristics
Signal type
CYC_PWR = High
CYC_PWR = Low
Table 9-15 CYC_PWR output
CYC_PWR Output
Low level voltage
High level voltage
Source current, CYC_PWR = Low
Source current, CYC_PWR = High
Signal rise and fall time

9.11 I_MON

This signal is an MV12 output current sharing signal. The system backplane directly connects the
I_MON signals of all PSUs together.
12 V current sharing signal:
V (I_MON) = 6.0 V ± 0.30 V, I
Technical Manual
PSU side: This signal is pulled up to the 3.3 V auxiliary power source inside
the PSU through a pull-up resistor (reference value: 2.49 kilohms).
System side: This signal is output by CPLD over the drive circuit and pulled
up to 3.3 V by a 4.7-kilohm resistor.
The PSU does not act.
The PSU enters power supply cycle power mode.
Minimum
0 V
2.0 V
-
-
-
= full load (250 A)
out
9 Control Functions
Maximum
0.8 V
3.465 V
4 mA
4 mA
200 μs
44