Table of Contents
Advertisement
Commissioning instructions
How to connect the Audio Loop
The audio loop may be commissioned once the analogue
detection loop has been satisfactorily powered up with addresses
allocated to all the devices on loop circuits,
Earth to
metal box
L1
+
L2
+
0V
+
+
2 - way device
L1
+
L2
+
0V
+
+
2 - way device
P14
Master Control Board
PANEL
&
Before connecting the audio loop at the
panel ensure the panel is powered down.
It is recommended that each audio loop circuit is wired up and
tested independently.
Testing the Audio loops
The audio loop must also be tested for open circuit and short
circuit faults.
Open circuit fault on Audio loop
When the positive or negative line of the audio loop is
disconnected at any point on the loop, the panel will display a
fault message and will light the fault LED, plus the panel buzzer
will sound.
L1 01 L2 02
I/A
I/B
O/A O/B
P4
P12
ANALOGUE LOOP
AUDIO LOOP
micro Distributed Amplifier unit
Note: The 0V terminals
in the device terminal plate
are electrically
connected together.
L1 0V L2 0V L1 0V L2 0V
LOOP 2
LOOP 1
P7
Manual call point
ANALOGUE LOOP CIRCUIT 1
AUDIO LOOP CIRCUIT 1
O/A O/B I/A
I/B
O/A O/B I/A
P12
AUDIO LOOP 1
AUDIO LOOP 2
Audio Control Card
The message displayed will read:
ACC Loop n O/C
There will also be other information such as time and date of the
event.
Short circuit fault on Audio loop
When the positive and negative lines of the audio loop are short
circuited together at any point on the loop, it will cause a fault
event and the panel will display a fault message and will light the
fault LED, plus the panel buzzer will sound.
The message displayed will read:
ACC Loop n S/C (1,4)
There will also be other information such as time and date of the
event.
The numbers in the brackets will help identify the location of the
short circuit. In this case the location of the fault is between micro
DAU device address 1 and 4.
How to link out an
audio loop if it is
I/B
not being used
P13
O/A O/B I/A
I/B
AUDIO LOOP
Advertisement
Table of Contents
