PEPPERL+FUCHS HOT SELL Switch Amplifier KFA4-SR2-Ex1.W.LB Intrinsic Safety Barriers Isolated Barriers K-System
PEPPERL+FUCHS Switch Amplifier KFA4-SR2-Ex1.W.LB Intrinsic Safety Barriers Isolated Barriers K-System
Switch Amplifier KFA4-SR2-Ex1.W.LB
· Control circuit EEx ia IIC
· Reversible mode of operation
· Output I: relay contact output (change-over contact)
· Output II: optionally signal output/fault signal
· EMC acc. to NAMUR NE 21
· LB/SC monitoring
· Up to SIL 2 acc. to IEC 61508/IEC 61511
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 switch S1. Switch S2 allows output II to be switched between a signal output or an error message output.
Switch S3 is used to enable or disable line fault detection of the field circuit. During an error condition,
relays revert to their de-energized state and LEDs indicate the fault according to NAMUR NE44.