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5 Installation
CJ2 CPU Unit Hardware User’s Manual
5-3 Wiring
5
5-3-3 Wiring Basic I/O Units with Connectors
This section describes wiring for CJ-series Basic I/O Units with connectors (32- and 64-point Units).
Depending on the connector, the following methods are used to connect these Units 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 user-provided cable.
Precautions for Safe Use
• Be sure not to apply a voltage that exceeds the input voltage for Input Units or the maximum
switching capacity for Output Units.
• When the power supply has positive and negative terminals, be sure to wire them correctly.
Loads connected to Output Units may malfunction if the polarity is reversed.
• Use reinforced insulation or double insulation on the DC power supply connected to DC I/O
Units when required by EC Directives (low voltage).
• When connecting the connector to the I/O Unit, tighten the connector screws to a torque of
0.2 N·m.
• 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.
Additional Information
CJ-series Basic I/O Units with Fujitsu connectors have the same connector pin allocations as the
C200H High-density I/O Units and CS-series I/O Units with connectors to make them compati-
ble.
For details on using OMRON Connecting Cables equipped with special connectors to connect Basic I/O
Units with connectors to OMRON Connector-Terminal Block Conversion Units or I/O Relay Terminals,
refer to A-1-4 Connecting Connector-Terminal Block Conversion Units and I/O Relay Terminals.
5-3-3 Wiring Basic I/O Units with Connectors
Connecting to a Connector-Terminal Block Conversion Unit or I/O
Relay Terminal
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