Omron NX Series Hardware User Manual page 24

Precautions for Safe Use
• The End Cover has a metal portion and is heavier than it looks. Be careful not to drop it when han-
dling.
Installation
• Always connect to a ground of 100 Ω or less when installing the Units.
Wiring
• Follow the instructions in this manual to correctly perform wiring.
Double-check all wiring and switch settings before turning ON the power supply.
• Use the methods that are specified in this manual for wiring the terminal blocks.
• Use crimp terminals for wiring the M3 screw terminal blocks. Do not connect bare stranded wires
directly to the M3 screw terminal blocks.
• Use the correct wiring parts and tools when you wire the system. Otherwise, cables may be discon-
nected to cause short-circuit or wire breakage.
• Do not pull on the cables or bend the cables beyond their natural limit.
Do not place heavy objects on top of the cables or other wiring lines.
Doing so may break the cables.
• Mount terminal blocks, connectors, and other parts only after checking the mounting location care-
fully.
• Be sure that the terminal blocks and communications cables with tightening screws or locking devi-
ces are properly tightened to or locked into place.
• If the external power supply to an Output Unit or slave has polarity, connect it with the correct polari-
ty. If the polarity is reversed, current may flow in the reverse direction and damage the connected
devices regardless of the operation of the Controller.
• Do not press a flat-blade screwdriver straight into the release hole on a screwless clamping terminal
block. Doing so may break the terminal block.
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Restricted region
(shaded portion)
NX-series NX102 CPU Unit Hardware User's Manual (W593)