CJChxx.OpenWire

Cold Junction Open Wire (5069-IY4, 5069-IY4K)

Allen-Bradley · Compact 5000 I/O Analog Modules

What does CJChxx.OpenWire mean?

This boolean tag indicates that the cold junction wire is disconnected from channel (xx) or the Removable Terminal Block (RTB) is removed from the module. A value of 1 signifies an open wire condition. This prevents accurate cold junction temperature readings.

Common Causes

  • Cold junction signal wire disconnected from channel (CJChxx) terminals
  • Removable Terminal Block (RTB) removed from the module

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Confirm that the cold junction signal wire is securely connected to the designated terminals of channel (CJChxx).

  2. 2

    Verify that one of the compatible RTBs (5069-RTB14CJC-SPRING or 5069-RTB14CJC-SCREW) is correctly installed on the module.

Browse all codes in this manual (33)
Verified technical data. Last updated: March 2026

Related Faults

Source: Allen-Bradley Compact 5000 I/O Analog Modules