4-channel isolated barrier, 24 V DC supply (bus powered), Analog in or analog out signals, Sink and source mode outputs, SMART pass-through, Up to SIL 2 acc. to IEC/EN 61508, Housing width: 18 mm, Number of channels: 4-channel, HART communication, Safety Integrity Level (SIL): SIL 2, Rated voltage: 20.4 ... 30 V DC bus powered via Termination Board