Selecting A Power Supply Unit - Omron CJ2 User Manual

GR
Ground to a resistance of 100 Ω or less to avoid electric shock.
RUN Output (CJ1W-PA205R Only)
The internal contact turns ON when the CJ2 CPU Unit is operating (RUN or MONITOR mode). The
Power Supply Unit must be in the CPU Rack to use this output.
Alarm Output (CJ1W-PA205C Only)
The alarm output is used to notify when Power Supply Unit replacement is required. The output is nor-
mally ON. The output turns OFF when the time until replacement is 6 months or less.
3-3-3

Selecting a Power Supply Unit

After determining what power supply voltage is required, whether power output terminals and a RUN
output are required, and whether replacement notification is required, calculate the current and power
requirements for each Rack.
Condition 1: Current Requirements
There are two voltage groups for internal power consumption: 5 VDC and 24 VDC.
For details on the current consumption of individual Units, refer to 2-1-4 Configuration Units.
Current Consumption at 5 VDC
The following table shows the current that can be supplied to Units (including the CJ2 CPU Unit) that
use 5-VDC power.
Model
CJ1W-PA205R/205C
CJ1W-PA202
CJ1W-PD025
CJ1W-PD022
Current Consumption at 24 VDC
The following table shows the current that can be supplied to Units that use 24-VDC power supply.
Model
CJ1W-PA205R/205C
CJ1W-PA202
CJ1W-PD025
CJ1W-PD022
CJ2 CPU Unit Hardware User's Manual
Maximum current at 5 VDC
5.0 A
2.8 A
5.0 A
2.0 A
Maximum current at 24 VDC
0.8 A
0.4 A
0.8 A
0.4 A
3 Nomenclature and Functions
3
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