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Line resistance and capacitance, 4 line resistance and capacitance, Max. r max. c – Siemens FC700A User Manual

Page 39

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Connection factors, line resistances and capacitances

39

Siemens Building Technologies

007836_a_en_--.doc

Fire & Security Products

03.2004


16.4 Line resistance and capacitance

The max. line resistance of the entire detector loop respectively from the detec-
tor furthest away to each of the two control unit connections must not exceed
150Ω .

The entire line from the control unit to the equipment connected and back again
to the control unit as well as response indicator lines must be included when
working out capacitance.

DC1192

24VDC

E3M111

AB322A

EB322A

ABI322A

DC1192

DC1192

CB320A

24VDC

DC1192

24VDC

24VDC

max. R

max. C


Max. Resistance 150Ω (max. R)
Max. Capacitance 300nF (max. C) -> max. 600nF with max. 50Ω line resistance