Hochiki FIRElink-NANO - Manual (Page 10)

Page 10 of 21 FIRElink-NANO Air Sampling Detector – Installation and User Manual
© 2010 Hochiki Europe (UK) Ltd 9-5-0-425/ISS1/JUL10
6 Installation: Electrical
Power Supply Connections
Connect “+24V” to PSU “+” terminal
Connect “EARTH” to PSU mains earth terminal
Connect “0V” to PSU “-” terminal
Volt-free Relay Contacts
NB: All relay contact positions are shown with the detector in
the unpowered state.
The FIRE and PRE ALARM relay contacts will change over
when the unit enters the appropriate Alarm state.
The FAULT relay will pull in when the detector is operating
normally. The relay contacts will drop out during a Fault
condition.
Remote control input
DIL Switch 7 OFF: Connect to PSU Fault output contacts for
PSU monitoring; N/C OK, N/O PSU Fault
* .
DIL Switch 7 ON: ClassiFire
®
Override will reduce detector
sensitivity by 50% while the input terminals are shorted
together, e.g. by a key switch.
External communications terminals, optional
communications card fitted (RS-485 serial
communications mode):
Connect Command Module or detector RS-485
(SenseNET™) serial bus to A and B.
Use screened twisted pair cable. Connect screen to either of
the SCREEN terminal(s). Earth the screen at one end ONLY
(if one or more detectors connected to a Command Module,
earth the cable screen at the Command Module only).
Optional APIC card fitted (addressable communications
mode):
Connect + and - IN and + and -OUT terminals to fire panel
using an APIC compatible with the panel’s communications
protocol.
When one or more detectors are connected to a Command
Module, it may be easier to fit each detector with a
communications card and use a single APIC in the Command
Module, set to cover the range of chosen detector addresses.