KFD2-SR2-EX2.W Switch Amplifier
Pepperl+Fuchs is a worldwide company manufacturing products for fabrication and process automation, specialising in sensor manufacturing.
The KFD2-SR2-EX2.W Switch Amplifier is 24VDC supply voltage with a reversible mode of operation. They are rated at IP20, have screw terminal connections and dimensions of 20 x 119 x 115mm.
The device is a dual channel, galvanically isolated intrinsic safety barrier with a built in amplifier. It transfers discrete digital signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe area.
The proximity sensor or switch controls 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.
The transformer isolated barrier transfers digital signals from the hazardous area, and sensors and mechanical contacts can be used as alarms. Control circuits are monitored for lead breakage and short circuiting.
The external faults are indicated by a red flashing LED. During an error condition, the relays revert to their de-energised state and the LEDs indicate the fault according to the NAMUR NE33. A unique collective error messaging feature is available when used with the power rail system.
For type KFD2-SR2-EX2.W a lead breakage and short circuit combined error signal is in addition transferred through the Power Rail to the power feed module. The intrinsically safe inputs are safely isolated from the output and the power supply. Relay outputs are separate from the mains power.
If you are interested in applying a KFD2-SR2-EX2.W Switch Amplifier into your control system to improve safety measures, or are interested in any other Pepperl+Fuchs products; please get in touch today on 01244 288138 or info@dbicontrol.co.uk.
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