Atmospheric Oil Mist Detection System
MULTIPLEX
AM8/JANUARY 2015
EMAIL qmi@oilmist.com WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL +44 (0)20 7328 3121
Installation Part2-11
WIRING DESCRIPTION
The wires are terminated into Harting plugs. These plug into the connectors on the
MULTIPLEX power supply board (PSB).
WIRING FOR POWER SUPPLY 110/240 VAC
The Mains connector is a 4-pin with Live, Neutral, and Earth. On the Power Supply
Board this is marked L, N + See drawing of connector QMI-05-1106, Part 2-20.
Cable is 3 core of 1.5mm
2
and can be sourced from Helkama, part number is LKM - HF
3 x 1.5.
WIRING FOR SENSORS
The Sensors are wired using 3 twisted - pair cable. Each connector is wired left to right
and numbered 1 to 6. The cable specification is 3 twisted pair of 0.5mm
2
or 3
twisted pair of 0.75mm
2
where distance is over 100 meters.
This cable can be sourced from Helkama: part number is RFE - HF 4 x 2 x 0.5mm
2
or
4 x 2 x 0.75mm
2
.
Terminal 1 = Sensor supply +
Terminal 2 = Sensor signal
Terminal 3 = Sensor supply common
Terminal 4 = Sensor signal common
Terminal 5 = Drain wire/screen
Terminal 6 = Fan 12V DC supply
See drawings for wiring connectors Part 2-19 and QMI-05-1105 on Part 2-23. Also
wiring of socket QMI-05-1104 Part 2-22.
There are three warning alarms: Early warning, Shutdown, and Main. There is also a
Fault Alarm.
The cable to use for wiring of alarms can be the same as used for wiring of air sensors.
If you intend to use all four alarms you will need a 4 twisted pair cable.
Wiring for Monitor to Junction Box QMI-05-1101 Part 2-15.
Wiring for functional relay see drawing QMI-05-1105 Part 2-23.
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