Isolating switching amplifier, 4-channel, Operating voltage 10…30 VDC, 4-channel, 4 relay outputs, Separate relay output for collective fault signals (NO), Configuration via rotary and DIP switches, 4-channel operation or signal multiplexing (switchable), Adjustable output mode (NO/NC), Input circuits monitored for wire break/short circuit (can be switched ON/OFF), Complete galvanic isolation, Input reverse-polarity protected, Removable spring-type terminals, Power-Bridge (connector incl. in delivery), ATEX, IECEx, Use in Zone 2, SIL 2