KFD2-SRA-EX4, Switch Amplifier
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Switch Amplifier, KFD2-SRA-EX4
- 4-channel isolated barrier
- 24 V DC supply (Power Rail)
- Dry contact or NAMUR inputs
- 50 % less wiring, 2:1 technology
- Relay contact output
- Line fault detection (LFD)
- Reversible mode of operation
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.
Each sensor or switch controls one form A normally open relay contact for the safe area load. A special 2:1 wiresaving technology is available on this isolator, reducing field wiring by 50 %.
Switch S1 is used to enable or disable line fault detection of the field circuit. The 2:1 mode is selected with switch S2 while the remaining switches, S3 ... S6, are used for reversing the normal output state of the relays.
A unique collective error messaging feature is available when used with the Power Rail system.
