Omron CJ - 09-2009 Operation Manual page 305

Wiring
DC Power Supplies
CJ1W-PD025 Power Supply Unit
DC power source
DC Power Source
Power Supply Capacity
Precautions when Using CJ1W-PC022 Non-insulated Power Supply Units
!Caution When connecting a personal computers or other peripheral devices to a PLC
Crimp Terminals
PD025
Supply 24 V DC. Keep voltage fluctuations within the specified range.
Model
CJ1W-PD025 19.2 to 28.8 V DC (±20%)
CJ1W-PD022 21.6 to 26.4 V DC (±10%)
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.
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.
Wiring in Which the 24-V Power Supply Will Short
Non-insulated
DC power supply
24 V
0 V
Power Supply
FG
Unit
Terminal screws
Recommended wire size
Recommended tightening
torque
POWER
DC24V+
INPUT
NC
NC
Allowable voltage fluctuation range
Peripheral
cable
Peripheral device (e.g.,
CPU Unit
personal computer)
M4 self-rising screws
AWG 20 to 14 (0.517 to 2.08 mm
1.2 N·m
Section 5-3
Screw (M4 head with self-
raising pressure plate)
0 V
2
)
257