CV500-SLK21 datasheet(74/182 Pages) OMRON

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3-5

Wiring I/O Units

Connect the I/O Devices to the I/O Units using AWG 22 lead wire (cross-section-

al area: 0.3 mm2) for 19-terminal terminal blocks and AWG 22 to 18 lead wire

(cross-sectional area: 0.3 to 0.75 mm2) for 10-terminal terminal blocks. The ter-

minals have screws with 3.5-mm diameter heads and self-raising pressure

plates. Connect the lead wires to the terminals as shown. Tighten the screws to a

torque of 0.8 N

S m.

M3.5 screw

Tightening torque: 0.8 N

S m

Terminal block

20-terminal

Terminal block

38-terminal

Terminal block

25 mm max.

16.5 mm max.

Use crimp terminals for wiring. Do not connect bare stranded wires directly to

terminal blocks. Use M3.5 screws for tightening crimp terminals.

7 mm max.

WARNING Always attach crimp terminals to the wires to ensure proper connection.

Connecting loose wires can cause fires.

Caution

Abide by the following precautions when wiring the I/O Units. Failure to abide by

these precautions my cause faulty operation or damage to the Unit.

• Be sure that no wire clippings or other foreign materials enter the Units when

wiring.

• Check and recheck all wiring before supplying power to the system.

• Check and recheck terminal block before mounting them to the Unit.

Note

1. Putting I/O lines and high-tension lines or power lines in the same duct or

conduit may cause the I/O lines to be affected by noise. This may cause a

malfunction in the Unit or may damage the Unit or I/O devices.

2. Use reinforced insulation or double insulation on the DC power supply con-

nected to DC I/O Units when complying with EC directives (low voltage).

3. Use separate power supplies for Relay Output Units and DC I/O Units when

complying with EC directives (low voltage).

Wiring I/O Units

Section 3-5

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