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PAC2000S12-B1 PSU
Table 9-13 CYC_PWR# signal characteristics
Signal Characteristics
Signal type: Shuts down or restores
MV12 output.
CYC_PWR# = High
CYC_PWR# = Low
Table 9-14 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
9.10 I_MON#
This signal is an MV12 output current share signal. The system backplane directly connects the I-
MON signals of all PSUs together.
9.11 IP PRESENT#
IP PRESENT# is an active-low signal that controls the SV12 switch of the PSU. After IP PRESENT is
valid, the PSU enters the SV12 output state. The designed overcurrent protection threshold is greater
than or equal to 50 A in this case. When the IP PRESENT# signal is at high level, the PSU maintains
the MV12 output mode.
PSU side: This signal is pulled up to the 3.3 V auxiliary power supply inside the PSU. The reference
value for the pull-up resistor is 4.75 kilohms.
System side: CPLD is output over the drive circuit and pulled up to 3.3 V. The reference value for the
pull-up resistor is 4.7 kilohms.
Technical Manual
PSU side: This signal is pulled up to 3.3 V auxiliary power
supply inside the PSU by a 2.49-kilohm resistor.
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 has no action.
The PSU enters power supply cycle power mode.
Min.
0 V
2.000 V
-
-
-
9 Control Functions
Max.
0.8 V
3.465 V
4 mA
4 mA
200 μs
40
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