Omron NX-IA3117, User Manual

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4 Installation and Wiring
4 - 32 NX-series Digital I/O Unit User’s Manual (W521)
This section describes wiring for the Digital I/O Units with connectors.
Depending on the connector, the following methods are used to connect the Digital I/O Units with con-
nectors to external I/O devices.
• Use an OMRON Connecting Cable (equipped with a special connector) to connect to a Terminal
Block or Relay Terminal.
• Use a special connector and make your own cable.
Precautions for Safe Use
• Do not apply voltages that exceed the rated value to any Input Unit.
• Do not apply voltages or connect loads to the Output Units or slaves in excess of the maxi-
mum ratings.
• Turn ON the power after checking the connector's wiring.
• Do not pull the cable. Doing so will damage the cable.
• Bending the cable too sharply can damage or break wiring in the cable.
OMRON Connecting Cable can be used to connect Digital I/O Units with connectors to OMRON Con-
nector-Terminal Block Conversion Units or to OMRON I/O Relay Terminals.
For details, refer to A-3 Connecting Connector-Terminal Block Conversion Units and I/O Relay Termi-
nals on page A-63.
 Connection Examples
Precautions for Safe Use
If the external power supply has polarity, connect it with the correct polarity. If the polarity is
reversed, current may flow in the reverse direction and damage the connected devices regard-
less of the operation of the Controller.
4-3-2 Wiring to Connectors
Connecting to Connector-Terminal Block Conversion Units or I/O
Relay Terminals
Connector-Terminal
Block Conversion Unit
20 or 40 terminals
Connecting Cable
NX Unit
Connector-Terminal Block Conversion Unit
I/O Relay Terminal
Connecting Cable
NX Unit
I/O Relay Terminals