Planning - Siemens FDCL221 Technical Manual

Line separator

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Unique detector line topology recognition is ensured if at least one device with a

separating function is present between two sub-stub lines. In this case a line

separator.

If several sub-stub lines are to be activated on one FDnet/C-NET loop, failure of

large numbers of devices must be prevented in the event of a line short-circuit. In

this regard the national regulations must be observed. From a FDnet/C-NET

communication point of view, the line separator is a normal line participant which

occupies one bus address and is visible in the line topology.

The following figures show the common variants of a modernized detector line on

which the FDnet/C-NET devices (T) are installed with integrated line separation

function. The outgoing stub lines A to D are connected to the FDCL221 line

separators via terminal blocks or micro terminals (X).

Housing FDCL221 line separator in intermediate distributors

1 Intermediate distributor

2 FDnet/C-NET loop

3 FDCL221 line separator

A Sub-stub A

B Sub-stub B

C Sub-stub C

D Sub-stub D

T FDnet/C-NET device

X Terminal blocks or micro terminals

Planning

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09.06.2009

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