Omron F3SG-R Series, User Manual

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21
F3SG-4RA-25-02TS
User’s Manual
Chapter
2
External D
evice Monitoring
(ED
M)
System Operation and Functions
E
2-7. External Device Monitoring (EDM)
2-7-1. Overview
This function monitors if external relays (or contactors) operate normally to detect malfunctions, such as
welding, in the external relays. When the N.C. contact of the external relays is open before the safety
outputs switch from OFF to ON, the safety outputs remain in the OFF state. When the N.C. contact is not
open within the allowable delay time after the safety outputs switch from OFF to ON, the F3SG-R enters
the Lockout state.
Perform wiring so that the specified voltage (Vs-3 V to Vs) is applied to the EDM line via the N.C.
contact of the extenal relays.
The external relays or contactors must have the direct opening mechanism or be force-guided ones.
When the EDM is not used, apply the auxiliary output signal to the EDM line.
 Basic wiring diagram
 Timing chart
KM1, KM2: External device
KM1
F39-JD A-D
KM2
Receiver
Power supply
0 VDC : Blue EDM : Red +24 VDC : Brown
0 VDC
+24 VDC
ON
OFF
ON
OFF
T1
Lockout
T1 max.
T1: Allowable delay time
Unblocked
Blocked
Beam state
OSSD
EDM input