Detnov CAD-250, Руководство по установке

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35
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3.9.3. Cancelling sounder outputs
If you are going to use addressable sounders connected to the loop
and you are not going to use the sounder outputs on the MAIN BOARD,
carry out the following steps:
1. On the main board, locate the SND1 and SND2 connections (see
section 3.4).
2. Connect the end-of-line monitoring resistor between the + and -
terminals for the outputs of each sounder on the main board that you
are not going to use.
3.9.4. Checking the sounder line
To check the resistance of the sounder wiring line:
1. With the multimeter connected in reverse polarity, the reading
should be 4k7.
2.
With the multimeter connected in normal polarity, it must indicate
a low value. This is due to the polarised diodes in series with the
sounders.
3. Check the cable resistance to ensure activation of the sounders.
The sounder circuit can provide a maximum current of 0.5 A. A
resistance of more than 15 ohms could compromise the activation
of the sounders.
3. Check that no voltage is diverted from the main low voltage line
4. Connect the sounder line to the corresponding SND1 or SND2
output.
The voltage output values for sounders being monitored and that
are activated correspond to the following values:
Vsnd monitoring = of
-6 V to -7 V
Vsnd activated = of
26 to 28 V
JP32
JP7
OFF BUZZER
FAULT SYSTEM
⏚
ON OFF
INTERNAL
BUS
NET
RS485
LOOP CARD
POSITION 1/2
LOOP CARD
POSITION 3/4
LOOP CARD
POSITION 5/6
LOOP CARD
POSITION 7/8
R.Alarm R.Fault
NO NC C NO NC C
24V Aux SND1 SND2
+ - + - + -
NET RS485
IN OUT
A B
⏚
A B
⏚
Vin
+ - ⏚
10A
BAT
+ -
24V
A
UX
0.5A
SND2 0.5A SND1 0.5A
BAT
10A
4K7 resistor 4K7 resistor
step 4
step 1
4K7 resistor
step 3
Ω
step 2
4K7 resistor
JP32
JP7
OFF BUZZER
FAULT SYSTEM
⏚
ON OFF
INTERNAL
BUS
NET
RS485
LOOP CARD
POSITION 1/2
LOOP CARD
POSITION 3/4
LOOP CARD
POSITION 5/6
LOOP CARD
POSITION 7/8
R.Alarm R.Fault
NO NC C NO NC C
24V Aux SND1 SND2
+ - + - + -
NET RS485
IN OUT
A B ⏚ A B ⏚
Vin
+ -
⏚
10A
BAT
+ -
24V
A
UX
0.5A
SND2 0.5A SND1 0.5A
BAT
10A
Ω