Function - Siemens FDCL221 Technical Manual

3.3

Function

Building Technologies
Fire Safety & Security Products
The FDCL221 line separator is an electronic switch which is inserted in the
FDnet/C-NET.
The function of the line separator in the FDnet/C-NET loop is to connect sub-stub
lines to the FDnet/C-NET and selectively disconnect them in the event of a short-
circuit. In the event of a short-circuit in the FDnet/C-NET, the line separator
disconnects the negative conductor such that the side not affected by the short-
circuit can continue to be operated.
The FDCL221 line separator has 2 x 2 screw terminals for the FDnet/C-NET.
The status of the line separator is indicated by a yellow LED. The LED flashes if
the line separator is open or in localization mode.
The line separator is installed in the intermediate distributor or directly in the fire
control panel.
Structure and function
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09.06.2009