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2000 SERIES SENSORS INSTALLATION GUIDE Revision 3.1 June 1997
3.2.3 Loop Resistance
LOOP 1
RESISTANCE
Part
Code
Resistance
Number of
Devices
Total Resistance
(ohm)
PANEL SOURCE
FP2000
10
1
10
ISOLATORS
IU2016
1
CABLE
2L1.0 MICC
0.017
(Ohm/m/CORE)
2L1.5 MICC
0.011
2L2.5 MICC
0.1168
FP200 1.0
0.0181
FP200 1.5
0.0121
FP200 2.5
0.0074
WS104
0.05
WC104
0.020635
Table 4 : Resistance
Calculation for Minimum Device Voltage (Vmin) Under Worst Case Conditions:
TOTAL CURRENT
:
I
(sum of quiescent and alarm current)
TOTAL RESISTANCE
:
R
LOOP VOLTAGE
:
V
( e.g. FP2000 : 29 V )
Vmin
=
V — (I x R)
Vmin > =
17 volt — no Zone Monitoring Units
Vmin > =
20 volt — with Zone Monitoring Units