A guard locking device can be connected to the output INTERLOCK_OUT of an eSM safety module.
If the velocity is zero, the level at the output INTERLOCK_OUT of the safety module eSM is 1. Multiple safety modules eSM can be interconnected by chaining the signal of output INTERLOCK_OUT and the input INTERLOCK_IN of the next safety module eSM.
Guard locking device and signal chaining: