IDEC FS1A Controller - Manual (Page 81)

5-40
Logic 5: General purpose logic for devices for which sync time between
contacts cannot be specified
Overview (Logic 5)
The logic described is for safety protective measures applicable to production machinery, robots,
and other machinery. This logic enables the connection 6 dual channel dependent inputs.
Same as Logic 1, when SafetyOne is in the safe state, all of the safety inputs can receive safety
input signals (the contacts of all connected safety devices are ON), safety outputs are turned ON
upon input of the start input. While the safety outputs are ON, if the safety input signal to any input
of the safety inputs has been turned OFF (the contacts of any the safety devices are OFF), the
safety outputs are turned OFF after the preset OFF-delay time. The difference from Logic 1 is that
the input monitoring error detection time in Logic 5 is infinite, so safety functions can be performed
independent of the speed of opening the guard.