Wiring Power Supply And Ground Lines - Omron CP1H CPU Operation Manual

Wiring CP1H CPU Units
3-4-1

Wiring Power Supply and Ground Lines

CPU Units with AC Power Supply
Wiring the AC Power Supply and Ground Lines
LG: Functional ground terminal
!Caution Tighten the terminal block screws for the AC power supply to the torque of
100 to 240 VAC at 50/60 Hz
R
S
MCCB
Upper terminal block
L1 L2/N COM 01
00 02
GR: Protective ground terminal
Ground (100 Ω or less)
• Wire a separate circuit for the power supply circuit so that there is no volt-
age drop from the inrush current that flows when other equipment is
turned ON.
• When several CP1H PLCs are being used, it is recommended to wire the
PLCs on separate circuits to prevent a voltage drop from the inrush cur-
rent or incorrect operation of the circuit breaker.
• Use twisted-pair power supply cables to prevent noise from the power
supply lines. Adding a 1:1 isolating transformer reduces electrical noise
even further.
• Consider the possibility of voltage drops and the allowable current, and
always use thick power lines.
• Use round crimp terminals for AC power supply wiring.
6.2 mm max.
• AC Power Supply
Provide a power supply of 100 to 240 VAC.
• Use a power supply within the following voltage fluctuation range.
Power supply voltage
100 to 240 VAC
Note (1) Before connecting the power supply, make sure that the CPU Unit re-
quires an AC power supply and not a DC power supply. The CPU Unit's
internal circuitry will be damaged if AC power is mistakenly supplied to a
CPU Unit that requires a DC power supply.
(2) The power supply input terminals are at the top of the CPU Unit; the ter-
minals at the bottom of the CPU Unit output 24-VDC power for external
devices. The CPU Unit's internal circuitry will be damaged if AC power is
mistakenly supplied to a CPU Unit's power supply output terminals.
0.5 N·m. Loose screws may result in fire or malfunction.
• Always ground the ground terminal to 100 Ω or less to protect against
electric shock and incorrect operation from electrical noise.
03 05 07 09 11
04 06 08 10
Allowable voltage fluctuation range
85 to 264 VAC
Section 3-4
01 03 05 07
00 02 04 06 08
09 11
10
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