2-channel signal conditioner, 24 V DC supply, PNP/push-pull, dry contacts or NAMUR inputs, Selectable frequency trip values, 2 relay contact outputs, Start-up override, Selectable mode of operation, Without line fault detection, Up to SIL 2 acc. to IEC/EN 61508, Housing width: 20 mm, Number of channels: 2-channel, Trip relay, Start-up override, Rotation direction monitoring, Rotation speed monitoring, Safety Integrity Level (SIL): SIL 2, Rated voltage: 20 ... 30 V DC, Field device: NAMUR sensor