Digital outputs provided at CON16 are usual normally open relay contacts. As soon as sat-nms IO-FEP2 is powered off, relay contacts are open. The external voltage that might be switched by this relays must not exceed 48V. Maximum possible continuous current to be switched is 1A. COM11-13 is switched by three relays to 11, 12 and 13. An additional COM allows easy cabling of e.g. relays, control lamps or something like that. 14, 15 and 16 are single contacts without a common potential.
For each output there is one green LED available showing actual state. In contrast to photomos outputs, corresponding green LED is ON, when contact is CLOSED. If LED is OFF, corresponding output is OPEN.