KERN FEJ-A07 Notice D'installation page 13

2.2 Relay contact
2.3 Connection methods
2.4 Connection optoelectronic coupler
2.5 Relay input (example)
FEJ-A07-IA-defsi-0610
NO
NC
COM
VF
Opto-coupler
VF=0.8∼1.4V
Technical data:
AC 125 V/0.5A
DC 30V/1A
100Ω
+
-
13