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Product function

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 de-energized state and the LEDs indicate the fault according to NAMUR NE44.

Product features

2-channel isolated barrier

230 V AC supply

Dry contact or NAMUR inputs

Relay contact output

Line fault detection (LFD)

Reversible mode of operation

Up to SIL 2 acc. to IEC 61508/IEC 61511

Housing width: 20 mm

Safety Integrity Level (SIL): SIL 2

Rated voltage: 207~253 V AC, 45~65 Hz

Field device: NAMUR sensor

Type: 2 x relay (change-over contact)

Reversible mode of operation

Application area

Industrial automation


Ex2.W connection.png

KFA6-SR2-Ex2.W Manual.pdf