[PNP type] Configuration of Safety Circuit

Input signals to the safety circuit are important for safety. Be sure to configure their circuits with contacts as shown below, observing the notes given below.

For the overall configuration sample of a safety circuitry, refer to "Safety Circuit."

Precautions on Connecting the Safety I/O

1. Two External Emergency Stop input signals must be controlled with separate contacts. Two circuits connected in parallel using a single contact or an always-shorted circuit will be interpreted as an external circuit failure so that the emergency stop state cannot be reset.
2. Two Protective Stop input signals and two Enable Auto input signals each must be controlled with separate contacts. Two circuits connected in parallel using a single contact or an always-shorted circuit will be interpreted as an external circuit failure so that the circuitry will not operate.
3. If an inconsistency between the External Emergency Stop signal and the Enable Auto input signals, or between the Protective Stop signal and the Enable Auto input signals continues over a certain period of time(about 0.5sec), an error occurs.

Input Circuits to the Safety Circuits