"Features
2-channel isolated barrier
24 V DC supply (Power Rail)
Dry contact or NAMUR inputs
Relay contact output
Line fault detection (LFD)
Reversible mode of operation
Up to SIL2 acc. to IEC 61508

This isolated barrier is used for intrinsic safety applications. It transfers digital
signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe
area.
The proximity sensor or switch controls a form C changeover relay contact for the
safe area load. The normal output state can be reversed using switches S1 and S2.
Switch S3 is used to enable or disable line fault detection of the field circuit.
During an error condition, the relays revert to their deenergized state and the LEDs
indicate the fault according to NAMUR NE44.
A unique collective error messaging feature is available when used with the Power
Rail system."