FIRElink-25 – Installation Manual
Page 25 of 40
©
2010 Hochiki Europe (UK) Ltd
9-5-0-344/ISS4/OCT10
Piped Exhaust Docking Station
4.1.1 Mechanical
Installation
The docking station is connected to the installed sampling pipe-work and fixed to the wall or mounting
surface using 3 off screws of a type appropriate to the mounting surface. Ensure that the sampling and/or
exhaust pipes are securely seated in the pipe ports before fixing. If using a piped exhaust docking station
be sure that the sampling and exhaust pipes are fitted into the relevant ports as shown in section 4.1.
4.1.2 Electrical
Installation
The FIRElink-25 detector is supplied with removable terminal blocks (See illustrations in Section 0).
These are simply removed from their sockets by lifting them up at right angles to the circuit board. Take
note of the orientation of each terminal block and its function before removing it. It may also be beneficial
to mark the connection wires with suitable identification labels or coloured rings to aid in the connection
process.
NOTE: All connections should be made with the power turned off.
4.1.3
Power Supply Connections
The power supply cable should be of screened type and should be led through the metal cable gland
provided, leaving about 35mm of the cable extending from the bottom of the cable gland. Depending on
the type of cable used, it may be necessary to increase the diameter of the cable with sleeving or
insulating tape to ensure that the cable is firmly held when the cable gland is fully tightened.
Remove the detector cover by unfastening the four screws at the front of the unit and detach the power
supply terminal block. This is at the top left with the detector held with the serial port at the bottom of the
unit.
NOTE: Be aware of the orientation of the terminal block.
Connect 0V and +24VDC to the “0V” and “24V” screw terminals respectively. Connect the screen wire to
the earth stud on the docking station and connect a second wire from the “Earth” terminal to the docking
station earth stud. The picture in Section 4.1 shows the location of the earth stud. Fix the earth wires in
place with the nuts provided.
4.1.4 Signal
Connections
To connect the signal wire, lead a suitable wire type (RS485
cable 9841, 120 ohm screened twisted pair or equivalent)
through the second cable gland and tighten it into position with
about 35mm of cable from the bottom of the cable gland.
Remove either the three-way terminal block next to the power
supply socket if connecting the detector to a SenseNET
system, or the four-way “Bus” terminal block if connecting the
detector to an alarm panel in conjunction with the FIRElink-
APIC addressable programmable interface card (see section
5.3).
For example, in a SenseNET system using screened cable
connect the screen wire(s) to the “SCN” terminal, Bus A wire(s)
to the “A” terminal and Bus B wire(s) to the “B” terminal. If the
detector is in the middle of a SenseNET chain, with input and
output connections, it may be more convenient to link the
common Bus A, Bus B and screen wires to single A, B and
screen wires for linking to the terminal block.
FIRElink-APIC
Address
Terminals
RS485/SenseNET
Terminals
