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Wiring and Connections Section 3-4
2. To remove the power supply connector, grasp the power supply connector
(not the wires), press on the lock level to release the lock tab on the con-
nector, and remove the connector.
Note 1. The CPM2C-PA201 is the recommended Power Supply Unit. When using
other power supplies, be sure to use a DC power supply with sufficient ca-
pacity and low ripple.
2. Do not perform a voltage withstand test on the DC power supply terminals
on the CPU Unit. The test might damage the PC’s internal components.
3. When the equipment must conform to the EC Directives (Low-voltage Di-
rectives), use a power supply with double insulation or reinforced insula-
tion.
3-4-3 Using the AC Power Supply Unit
Wiring Terminal Blocks Use round crimp terminals for wiring AC power supply input to the AC Power
Supply Unit (CPM2C-PA201). Use crimp terminals or solid wires for wiring to
the ground terminal and the service power supply terminals. Do not connect
bare stranded wires directly to terminals.
• Use M3.5 terminal screws.
• Tighten the terminal screws securely to a torque of 0.74 to 0.9 N•m.
Use round terminals of the dimensions shown.
Recommended wire size: 0.3 to 1.65 mm
2
(AWG 22 to 16)
Terminals can also be wired with solid wires. The recommended wire size is
0.6 to 1.6 mm diameter (AWG 22 to 14).
Grounding To prevent electric shock resulting from malfunction due to factors such as
noise, connect to a ground of 100
Ω or less. When grounding, use a wire at
least 1.25 mm
2
thick.
!WARNING Connect the ground terminal of the Power Supply Unit to a ground of 100 Ω or
less when installing the Unit. Not connecting to a ground of 100
Ω or less may
result in electric shock.
Power Supply Wiring
• To prevent voltage drops caused by startup currents and inrush currents
from other devices, wire the power supply circuits of the CPM2C sepa-
rately from power line circuits.
Round Terminal
6.2 mm max.
Ground of 100 Ω or less
+
−
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