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> Pepperl & fuchs, KFD2-SOT2-EX2 - amplifier, isolation
Pepperl & fuchs, KFD2-SOT2-EX2 - amplifier, isolation
***PEPPERL & FUCHS PART NO.: 181005*** This device is a dual-channel, galvanically isolated intrinsic safety barrier with a built-in amplifier that transfers discrete signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe area. Each proximity sensor or switch controls a passive transistor output. The barrier output changes state when the input signal changes state. The normal output state can be reversed through the mode of operation switches S1 and S2. For a mechanical contact, LB monitoring can be selected by placing a 10 kΩ resistor across the mechanical contact in the field and moving switch S3 to position I on the barrier. SC monitoring is added by placing a 400Ω-2 kΩ resistor in series with the mechanical contact. NAMUR proximity sensors, however, are designed with the LB and SC functions, making external resistors unnecessary. In case of a LB/SC fault, the signal output relay reverts to the deenergized state. LB/SC monitoring can be disabled with S3 in position II. If used in conjunction with P+F's Power Rail system, the unique collective error messaging feature can be utilized - - - - - - - - - - 2 -channel, 24 VDC supply/Power Rail, compatible, 1 signal output with 1 passive transistor, per channel, Suitable for Division 2/Zone 2 mounting, Optional lead breakage (LB) and short circuit (SC) monitoring, LB/SC collective error messaging via Power Rail, SIL 2 according to IEC 61508; SIL 3 in a redundant structure. ALSO SEE: Moeller Electric
