Omron NX-PA Series User Manual page 92

4 Installation and Wiring
Power Supply Unit
model
NX-PA9001
NX-PD7001
The setting ranges for the power OFF detection time are given in the following table.
Power supply
type
AC power supply
DC power supply
Operation at Power OFF Operation
Execution of the user program is ended if a power interruption exceeds the time shown in the table
below. The processing after power interruption confirmation (described below) is performed, and then
the system (i.e., CPU Unit) stops.
Power supply
type
AC power supply
DC power supply
Voltage drop
AC: 85 V max.
DC: 20.4 V max.
As shown in the following figure, the system (i.e. CPU Unit) will stop even if the voltage recovers after
the power interruption detection time.
Voltage drop
AC: 85 V max.
DC: 20.4 V max.
After stopping, the system will restart if the power supply remains recovery.
The table below defines the time that is used in the above two figures.
Item
Power OFF detection
time
4 - 4
Power supply input
100 to 200 VAC
24 VDC
Power OFF detection time
30.5 to 45.5 ms
5.0 to 20.5 ms
Time required for a power interruption
45.5 ms or longer
20.5 ms or longer
Power interruption confirmed.
Executing user program
Power OFF detection time
AC: 30.5 to 45.5 ms
DC: 5.0 to 20.5 ms
interruption
confirmed.
Executing user program
Power OFF detection time
AC: 30.5 to 45.5 ms
DC: 5.0 to 20.5 ms
The time from when the power supply voltage drops until the CPU Unit starts pro-
cessing after the power interruption is confirmed. The CPU Unit continues to
operate normally until the power interruption is confirmed.
Power interruption voltage
85 VAC max.
20.4 VDC max.
System stops.
(CPU Unit stops.)
Processing after power interruption is confirmed.
Power
Voltage System stops.
recovery
(CPU Unit stops.)
disabled
Processing after power interruption is confirmed.
Description
NX-series CPU Unit Hardware User's Manual (W535)
System reset
System reset