257
Wiring Section 5-3
DC Power Supplies
CJ1W-PD025 Power Supply Unit
DC Power Source Supply 24 V DC.
Keep voltage fluctuations within the specified range.
Power Supply Capacity The maximum power consumption is 50 W (PD025)/35 W (PD022) per Rack,
but there will be a surge current of about five times that level when the power
is turned ON.
Precautions when Using CJ1W-PC022 Non-insulated Power Supply Units
!Caution When connecting a personal computers or other peripheral devices to a PLC
to which a non-insulated Power Supply Unit (CJ1W-PD022) is mounted, either
ground the 0 V side of the external power supply or do not ground the external
power supply at all ground. A short-circuit will occur in the external power sup-
ply if incorrect grounding methods are used. Never ground the 24 V side, as
shown below.
Crimp Terminals The terminals on the Power Supply Unit are M4, self-raising terminals with
screws. Use crimp terminals for wiring. Do not connect bare stranded wires
directly to terminals. Tighten the terminal block screws to the torque of
1.2 N·m. Use crimp terminals (M4) having the dimensions shown below.
POWER
PD025
DC24V+
INPUT
NC
NC
DC power source
Screw (M4 head with self-
raising pressure plate)
Model Allowable voltage fluctuation range
CJ1W-PD025 19.2 to 28.8 V DC (±20%)
CJ1W-PD022 21.6 to 26.4 V DC (±10%)
24 V
0 V
FG
CPU Unit
0 V
Wiring in Which the 24-V Power Supply Will Short
Non-insulated
DC power supply
Power Supply
Unit
Peripheral
cable
Peripheral device (e.g.,
personal computer)
7 mm max.7 mm max.
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