Operating Instructions

Product description and method of operation
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2.4.3 Start/reset input
Designation: START
Local start/reset circuit The safety switch provides two possible startup behaviors:
– Autostart
The sensor is switched on automatically as soon as a valid actuator is detected in the
response area.
– Manual, monitored start
The sensor is switched on under the following conditions:
– If there is a valid actuator in the response area
And:
– After a local reset button has been pressed and released again
Implement the desired startup behavior of the safety switch via the corresponding wiring of
the START input.
Autostart For the automatic startup behavior, the sensor expects a clock signal from safety output
FO1A at the START input.
• For this, bridge the START input with the FO1A safety output.
Manual, monitored start If the sensor does not detect a clock signal from the FO1A/FO1B safety outputs at the
START input, the sensor is in manual, monitored, start behavior.
The sensor expects a signal change at the START input as the start command.
• Connect a reset button with 24 V DC to the START input.
Start pulse Manual, monitored start takes place with a falling edge of a 24 V signal (release of the reset
button). The start signal is subject to time monitoring: The 24 V signal must be applied at the
START input for at least 100 ms and 2 s, maximum.
Central reset for switch
chain
Also observe the information and assistance notes in the following sections:
– Section “Safety when starting applications” on page 11
– Section “Application examples” on page 46
The safety function can be centrally reset in the event that several switches are connected
in series. For this, execute the reset function at the evaluating switching device, and oper-
ate the individual switches with automatic startup behavior.