LEAK DETECTION SOLUTIONS
5
Unit 30, Lawson Hunt Industrial Park,
Broadbridge Heath, Horsham, West Sussex,
RH12 3JR
+44 (0) 1403 216100
info@aquilar.co.uk
www.aquilar.co.uk
H2. VOLT FREE RELAY CONNECTIONS
Figure 5 - Volt Free Relay
Connections
Note:
This output is volt free, no power is provided from these
terminals.
The AT-WFM is equipped with a single SPDT volt free relay for
control of accessories. This relay output operates when the unit
goes into alarm. It can switch a maximum resistive load of 3amps @
230Vac/24Vdc.
The relay allows for control of equipment requiring a normally open
or closed volt free contact, such as BMS. Or can be used to control
remote accessories such as AT-SD3 speech diallers or AT-BCN-A
beacons, third party valves etc.
H3. EXTERNAL TRIGGER INPUT
Figure 6 - External Volt Free
Connection
This input allows the controller to be put in and out of high and low
volume settings by external equipment such as a key switch or alarm
system. i.e intruder alarm for entry / exit setting.
A volt free normally open input is required. If enabled in software
closing this contact will place the AT-WFM unit into low volume
mode.
Volt Free Relay Output
Normally
Closed
Normally
Open
Common
External Volt Free
Trigger Input
H4. WATER METER CONNECTION
Connect the pulse output of the water meter to the AT-WFM as shown above. The connections are not polarity sensitive. If the cable on the
meter requires extending the connection should be made using a shielded 2 core cable.
Minimum cable size should be 1.0mm² for runs of up to 100m, for runs above this we recommend a minimum cable size of 1.5mm². For
cable runs above 50m or runs adjacent to mains cabling the shield of the pulse cable should be grounded at the controller end only using
one of the indicated ground terminals to prevent interference.
Figure 7 - Pulse
Input connections
CHANNEL 1
CHANNEL 2
SOL 1
SOL 2
METER 1 IN
METER 2 IN
PULSE 1 OUT
PULSE 2 OUT
+ -
+ - + -
+ - + -
+ -
Pulse Shield
Ground
Connection
Meter 1 (External)
Pulse Connection
White +ve
Brown -ve
Meter 2 (Internal)
Pulse Connection
White +ve
Brown -ve
Pulse Shield
Ground
Connection
Note:
Meters connected to
the AT-WFM should provide
dedicated volt free pulse for
volumes of 1/10/100 litre(s).
