Process Voltage Too Low

What does 16139 mean?

This error indicates that the measured process voltage supplied to the safety I/O module or its channels has dropped below the minimum permissible operating limits. Insufficient voltage can lead to unreliable operation or complete failure of the module and connected components, compromising safety functions.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check for any loose connections, voltage drops across cables, or excessive load on the power supply unit.