Omron F3SG-PG Series, User Manual, Page: 100 / 473

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Chapter
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F3SG-SR/PG
User’s Manual
System Operation and Functions
2-11. External Device Monitoring (EDM)
2-11-1. Overview
This function monitors if external relays (or contactors) operate normally to detect malfunctions, such as
welding, in the external relays. When the NC 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 NC contact is not
open within the allowable delay time after the safety outputs switch from OFF to ON, the F3SG-SR/PG
enters the LOCKOUT state.

Basic wiring diagram
Perform wiring so that the specified voltage is applied to the RESET input of F3SG-SR and F3SG-
PGA-A/-L receiver or F3SG-PGA-C emitter/receiver via the NC contact of the external device. Refer to
the table below for the specified voltage.
The external relays or contactors must have the direct opening mechanism or be force-guided ones.
• In Auto Reset mode
• In Manual Reset mode
F3SG-SRA

F3SG-PGA-A

F3SG-PGA-C

F3SG-SRB

F3SG-PGA-L

PNP/NPN Voltage
PNP Vs-3 V to Vs
NPN 0 V to 3 V
+24 V DC
0 V
P N P
KM1, KM2: External de v ice
KM1
KM2
0 V
+24 V DC
N P N
KM1
KM2
24 V /0 V (Bro w n)
RESET/EDM (Yello w ) *
0 V /24 V (Bl u e)
24 V /0 V (Bro w n)
RESET/EDM (Yello w ) *
0 V /24 V (Bl u e)
* W hen u sing a locko u t reset s w itch, connect an N C contact s w itch to this line in the position
sho w n b y the b roken line.
F3SG-SR/
F3SG-PGA-A/-L
recei v er,
F3SG-PGA-C
emitter/recei v er
F3SG-SR/
F3SG-PGA-A/-L
recei v er,
F3SG-PGA-C
emitter/recei v er
+24 V DC
0 V
P N P
S1
KM1, KM2: External de v ice
KM1
KM2
0 V
+24 V DC
N P N
S1
KM1
KM2
24 V /0 V (Bro w n)
RESET/EDM (Yello w )
0 V /24 V (Bl u e)
S1: Locko u t or interlock reset s w itch
24 V /0 V (Bro w n)
RESET/EDM (Yello w )
0 V /24 V (Bl u e)
F3SG-SR/
F3SG-PGA-A/-L
recei v er,
F3SG-PGA-C
emitter/recei v er
F3SG-SR/
F3SG-PGA-A/-L
recei v er,
F3SG-PGA-C
emitter/recei v er