2-channel isolated barrier, 24 V DC supply (bus powered), Dry contact or NAMUR inputs, Application-specific outputs, 2 passive transistor outputs (resistive), Line fault detection (LFD), Line fault transparency (LFT), Reversible mode of operation, Up to SIL 2 (SC 3) acc. to IEC/EN 61508, Housing width: 12.5 mm, Number of channels: 2-channel, Line fault transparency, Safety Integrity Level (SIL): SIL 2, Systematic capability (SC): SC 3, Rated voltage: 19 ... 30 V DC bus powered via Termination Board