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Automatic detectors
Manual call points
Input-/output modules
Sounder modules
Remote panel
Fire brigade panel
Fire brigade remote panel
Transmission device
Fire brigade key deposit box
Key deposit box release device
Additional power supply
Sounder
Flashlight
Telephone server
SCU800
Checking the wiring system
Before checking the wiring system you should disconnect all cables from the fire control panel by
removing the pluggable terminals.
Measure end of line resistors of conventional zones (without voltage)
6k8 (±10%) end of line resistor measurable on each conventional zone?
Fault
check wiring and end of line resistor.
ok
plug terminals in fire control panel
Measure cable resistance of loop wiring (without voltage)
If isolators are installed on the loop you only can measure the resistance of the minus wire.
You have to measure the cable resistance of each loop. The minimum operating voltage for each
loop device will be calculated from the cable resistance and the loop current, which has to be
measured later.
The resistance of the shielding also has to be written down in the following table. Additionally this
measurement guarantees that the shielding isn‟t interrupted in any loop device. As long as the
shielding hasn‟t been connected to earth in the FCP there must not be any other connection to
earth potential (e.g. in a detector base).You can check this by measuring the resistance between
the shielding and earth potential.
Loop card
1
1
2
2
3
3
4
NSC Sicherheitstechnik GmbH
Eckendorfer Str. 125 c
33609 Bielefeld
Loop
1
(ML-1-/ML-2-)
2
(ML-5-/ML-6-)
3
(ML-1-/ML-2-)
4
(ML-5-/ML-6-)
5
(ML-1-/ML-2-)
6
(ML-5-/ML-6-)
7
(ML-1-/ML-2-)
ML-Wire
Shielding
[Ω}
[Ω]
60/71
Wiring without
earth fault
yes
no
yes
no
yes
no
yes
no
yes
no
yes
no
yes
no
10.10.2012
Manual Solution F1- Español
Version S040A06.03
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