Aritech 2000 Series - Loop Resistance

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 (V
min
) Under Worst Case Conditions:
TOTAL CURRENT : I (sum of quiescent and alarm current)
TOTAL RESISTANCE : R
LOOP VOLTAGE : V ( e.g. FP2000 : 29 V )
V
min
= V — (I x R)
V
min
> = 17 volt — no Zone Monitoring Units
V
min
> = 20 volt — with Zone Monitoring Units