Hochiki FIRElink-400CM - Manual (Page 34)

Page 34 of 58 FIRElink-400 Air Sampling System – Installation Manual
© 2010 Hochiki Europe (UK) Ltd 9-5-0-346/ISS4/OCT10
1.1.1 Command Module Terminal Block Connections
All electrical (power and signal) connections should be made to the green terminal block inside the
detector. Power cables should be screened and of sufficient current carrying capacity. Signal cable
should be 120Ω screened twisted pair such as Belden 9841 24AWG. Power and signal cables should
enter the detector via metal cable glands.
Terminal block connections are as described below.
N/O = Normally Open, N/C = Normally Closed
* 1 These connections can be used as the input terminals for mains supply and battery fault sensing.
When this is the case, the contacts will signal a fault when the contacts are open rather than
closed, as fault relays operate in the opposite sense to other relays, in other words they are open
for normal operation. The factory default setting is for supply monitoring on ‘I/P 1’.
* 2 These connections are used to connect a detector to an addressable Fire Panel when a suitable
Universal Addressable Interface card is fitted to the ‘Addressable Interface’ connector on the left
hand edge of the detector main PCB (see section 9.4 “Connecting a Single FIRElink-400 to an
Addressable Fire Panel” on page 49).
6.4 Connecting Power Cables
For the system to meet full EMC compliance requirements, the following precautions should be taken:
Screened power cable should be used.
The earth wire of power cables should be connected to the detector EARTH terminal, and this in
turn connected to an earth stud on the detector chassis.