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Wiring Section 5-3
5-3 Wiring
5-3-1 Power Supply Wiring
CJ1W-PA205R Power Supply Unit (AC)
Note The RUN output function is enabled only when mounted to a CPU Rack.
AC Power Source
• Supply 100 to 240 V AC.
• Keep voltage fluctuations within the specified range:
• If one power supply phase of the equipment is grounded, connect the
grounded phase side to the L2/N terminal.
Isolation Transformer The PLC’s internal noise isolation circuits are sufficient to control typical noise
in power supply lines, but noise between the PLC and ground can be signifi-
cantly reduced by connecting a 1-to-1 isolation transformer. Do not ground the
secondary coil of the transformer.
Power Supply Capacity The power consumption will be 100 VA max. per Rack for the CJ1W-PA205R
and 50 VA for the CJ1W-PA202, but there will be a surge current of at least 5
times the max. current when power is turned ON.
RUN Output This output is ON whenever the CPU Unit is operating in RUN or MONITOR
mode; it is OFF when the CPU Unit is in PROGRAM mode or a fatal error has
occurred.
The RUN output can be used to control external systems, such as in an emer-
gency stop circuit that turns off the power supply to external systems when
the PLC is not operating. (See
5-1 Fail-safe Circuits for more details on the
emergency stop circuit.)
POWER
PA205R
DC24V
AC240V
OUTPUT
RUN
INPUT
AC100-240V
L2/N
L1
Isolation
transformer
1:1
AC power supply
100 to 240 V
AC power supply
M4 self-raising screw terminals
Power
supply
RUN output
ON when CPU Unit is in RUN or MONITOR mode.
OFF when CPU Unit is in PROGRAM mode or stopped for a fatal error.
Supply voltage Allowable voltage fluctuations
100 to 240 V AC 85 to 264 V AC
Item CJ1W-PA205R
Contact form SPST-NO
Maximum switching capacity 240 V AC: 2 A for resistive loads
120 V AC 0.5 A for inductive loads
24 V DC: 2 A for resistive loads
24 V AC 2 A for inductive loads
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