Interlock Function - Omron Sti F3SJ-E N25 Series User Manual



Interlock Function

Easy Type
Basic Type (basic system)
Basic Type (muting system)
The F3SJ-B turns the safety outputs OFF when its power is turned on or its beam is interrupted and
holds this state until reset input is applied. This state is called "interlock".
Two methods can be used to reset the interlock state: "auto reset" and "manual reset." "Auto reset"
automatically turns safety outputs ON when the interrupting object is removed. "Manual reset" keeps
safety outputs OFF until a reset signal is provided, if the interrupting object is removed.
 Auto reset
When the interrupting object is removed from the detection zone, the safety outputs automatically turn
ON. Auto reset is used on machines where a worker is not able to enter the area between the
detection zone and the hazardous part of the machine.
- Wiring for auto reset mode and external device monitoring function p.15
- Wiring for auto reset mode and deactivated external device monitoring function p.16
 Manual reset
When a reset input is given while no interrupting object exists in a detection zone, the safety outputs
turn ON. This allows the machine to be manually reset using a reset switch after ensuring safety,
preventing unexpected startup (EN 1037).
Unblocked
Unblocked
Blocked
/Blocked
Reset input
Safety output
Interlock state
There are two types of interlock as follows:
•The power is turned ON (start interlock).This is useful if you want to keep the machine stopped until
start inspection is completed after the power is turned ON.
•The F3SJ-B is blocked (restart interlock). After the F3SJ-B is blocked and the machine stops, manual
reset is effective when you want to restart the machine after an operator confirms a safe condition.
- Wiring when using manual reset mode and external device monitoring p.14
- Wiring for manual reset mode and deactivated external device monitoring function p.15
To reset:
1.
After applying a voltage of 0 V to 3 V for 300 ms or longer to the reset input line, set it to open or to 1/2
Vs to Vs.
Install the interlock reset switch in a location that provides a clear view of the entire
hazardous zone and where it cannot be activated from within the hazardous zone.

300 ms min.
ON
OFF
ON
OFF
Interlock
System Configuration and Functions
500 ms max.
Release
E
F3SJ-E/B
21
User's Manual