Safety Stop Mode (S1/S2 Open)

What does SA mean?

This alarm indicates that both safety input signals (S1 and S2) are in an open state, which triggers the safety stop function and causes the inverter output to shut off. This typically occurs as an intended safety action or due to a wiring issue, not an internal safety circuit fault.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Ensure that S1 and S2 are properly shorted to SC when the safety stop mode is not required, usually through a connected safety relay module.

2. 4

   Verify the operational status and proper functioning of any external safety relay module connected to S1, S2, and SC.