The 1771-OAN is a 32-channel AC output module for PLC-5 systems. It switches AC loads such as motors, solenoids, and indicators. Proper wiring is essential to ensure safe operation and reliable output control.

Step 1: Safety First

Always power down the chassis and field circuits before wiring. AC outputs can be lethal, and working live may damage the module or cause injury.

Step 2: Identify Terminals

The 1771-OAN module has 32 output terminals arranged in two rows. Each output has:

• Line (L) terminal – connect to AC supply phase

• Load terminal – connect to the device being switched

• Common (COM) – typically shared for groups of outputs

Consult the module label for exact numbering.

Step 3: Wiring Procedure

1. Strip each wire to 6–8 mm.

2. Connect the AC phase to each output line terminal.

3. Connect the device (motor, lamp, etc.) to the corresponding output terminal.

4. Ensure common connections are properly wired according to the module group.

5. Tighten screws securely but avoid over-torquing to prevent terminal damage.

Field tip: Label each wire according to output channel number for easier troubleshooting and future maintenance.

Step 4: Verification

• Double-check all connections for correct polarity and secure contacts.

• Power up the PLC and observe the module LEDs; they indicate output status.

• Test each output with a small load to verify correct switching.

References:

• Rockwell Automation. 1771-OAN AC Output Module User Manual, 2019.

• Rockwell Automation. PLC-5 Wiring Guidelines, 2018.