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Line Resistance And Capacitance - Siemens FC700A System Planning Manual

Fire detection system.
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16.4

Line resistance and capacitance

E3M111
24VDC
Siemens Building Technologies
Fire & Security Products
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
CB320A
24VDC
Max. Resistance 150Ω (max. R)
Max. Capacitance 300nF (max. C) -> max. 600nF with max. 50Ω line resistance
Connection factors, line resistances and capacitances
max. C
max. R
DC1192
DC1192
DC1192
24VDC
24VDC
EB322A
ABI322A
AB322A
007836_a_en_--.doc
03.2004
39

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