Commissioning instructions
64
4188-856_issue 7_07/15_Generic Vigilon (C VA) Comms.
Loop
circuit
tests
Positive line break test
A positive line break test should be carried out at this
stage:
¨
Disconnect the
+ve loop
connection at one End
of a loop circuit.
The display should read:
Wiring changed - split at card x
number y on loop z
"
A ve line break should not
cause the loss of any part of the system.
¨
Reconnect positive (
+ve) line
to clear the fault.
¨
Repair the loop using the
[Repair]
function the
panel, see page 62.
Earth fault test
Earth fault tests should be carried at this stage:
0V-line earth fault test
¨
Connect the
0V line
to the earth of the control panel enclosure.
This may have to be sustained for up to 1 minute for the fault to be
detected. The display should read:
Earth Fault
¨
On removal of earth fault the display should read:
Earth Fault cleared
+ve line earth fault test
¨
Now connect the
+ve line
to earth via a
10K ohm
resistor. This
may have to be sustained for up to 1 minute for the fault to be
detected. The display shows an Earth fault message as above and
after restoration a cleared message is displayed.
"
If the resistance between Earth and Loop +ve is in the
order of a few ohms then this will be registered as a ‘short circuit’.
Type of earth fault
Interrogate the
[PSU]
readings using the [
Test/Eng]
menu
to establish the type of Earth fault.
Type of Earth fault
Earth (Ear) reading
No earth fault
around 60
+ve line and earth
greater than 75
-ve line and earth
less than 40
¨
At the end of the test operate the
[Repair]
function at the panel.
LOOP CABLE
BOARD
TERMINALS
BOARD
PANEL
enclosure
L1
0V
10K
resistor
L1
0V
0V (-ve)
LINE
EARTH
FAULT
TEST
L1 (+ve)
LINE
EARTH
FAULT
TEST
L1
0V
BOARD
TERMINALS
BOARD
PANEL
enclosure
L1 (+ve)
LINE
GROUND
BREAK
TEST
LOOP CABLE
