4
Installing
Electrical Installation
When installing, the entire wiring must meet currently valid national
regulations regarding the installation of electrical devices, and - if necessary
- the national regulations regarding the installation in potentially explosive
atmospheres. In case of doubt, the o
ffi
cial responsible authorities are to be
consulted prior to installation of the device.
CAUTION
Ensure that any power is switched off before connecting any
cabling to the flame detector. The connections are made in the
rear terminal compartmant through suitable certified glands.
!
To access the terminal connections release the terminal cover locking screw using
a 2 mm hexagon key and unscrew the terminal compartment cover.
The detector requires 24 Volts DC nominal supply voltage, also available are an
isolated 4-20mA output and 3 relays.
Each detector has a built in terminal block of 37 terminals providing for a number
of output connections:
• 4 terminals for 24v DC power
• 2 terminals for 4 – 20mA output
• 6 terminals for alarm relay
• 6 terminals for fault relay
• 6 terminals for spare relay
• 2 terminals for manual test activation
• 2 terminals for internal linking of cable screens (shields)
• 2 terminals for passive components
• 1 terminal for connection to the enclosure (housing)
A 0-20mA current loop is provided along with an alarm relay and fault relay. A 2
input manual test inputs are provided which take a 24V input (referenced to an
external 0V, hence two inputs). This input allows the user to manually activate an
optical test. There is also a pair of terminals (35 & 37) into which is connected
a user de
fi
ned passive component to allow for interfacing to a number of vendors
fi
re panels.
NOTICE
Where terminals 35 & 37 are not interfaced with vendor panels but
the alarm relay is required it is necessary to place a hard wired link
between terminals 35 & 37.
!
Each terminal is capable of accepting a suitably crimped/ferruled 2.5mm² core
wires. The detector also has an external earth (ground) connection capable of
accepting 4mm² wires.
NOTICE
Wiring must be in accordance with local regulations. No more than
one conductor should be used in each terminal. Duplicate terminals
are supplied to allow ‘daisy chaining’ of connections if required.
Duplicate terminals are not supplied for 4-20mA connections, which
cannot be ‘daisy-chained’.
!
Figure 2: Wiring for operation with isolated 4-20mA output
37
29
28
15
14
1
+24 VDC
0 VDC
+4-20mA
-4-20mA
8
10
12 13
