FAQ Access control in hazardous areas
The interface card KCI-Ex of the associated communication controller system KCS, which also includes the communication processor KCP that controls the data communication between all card readers and the higher-level access control software, performs the intrinsically safe supply of the card reader.
Depending on whether the card reader should be used in zone 1 with gas group IIB, in zone 1 with gas group IIC or in a non-hazardous area, the corresponding KCI, KCI-Ex (IIB) or KCI-Ex (IIC) interface card must be used.
Hereto three or four card readers can be connected in series via a 4-wire supply and data cable. Further interface cards are required for additional card readers, which are lined up in the 19” subrack using expansion motherboards.
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