Error at Output 4

What does Diag 2 Flash 4 mean?

An error has occurred specifically at digital output 4. This can be caused by faulty test pulses (due to external supply or cross-circuit), high capacitive coupling from parallel cables, an actuator current outside the 20 mA to 500 mA range, or a short-circuit/voltage drop at the output. If left unresolved, output 4 may not function safely or correctly, potentially affecting the connected safety function.

Complete Troubleshooting Guide

1. 1

   Eliminate any cross-circuit or external supply detected at output 4.

2. 2

   If using parallel routed cables, isolate output 4 lines, lay them in separate non-metallic sheathed cables, and create distance to prevent capacitive coupling.

3. 3

   Ensure the connected actuator's current consumption for output 4 is within the specified range of 20 mA to 500 mA; select an appropriate actuator if necessary.

4. 4

   Check output 4 for short-circuits or excessive voltage drops in the supply lines; resolve any short-circuits and design the power supply to prevent drops.

5. 5

   Take suitable EMC measures if electromagnetic interference is suspected to be a contributing factor. If the issue persists, replace the terminal.