Chapter 2: Installation and assembly
24 LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook
Item Name Description
(11) AUX N/O Aux contacts
(12) FAULT N/C Fault contacts
(13) SPARE Spare
(14) RS-485 2A RS-485 bus 2 data line A
(15) RS-485 2B RS-485 bus 2 data line B
(16) SCREEN 2 RS-485 bus 2 screen
(17) SCREEN 1 RS-485 bus 1 screen
(18) RS-485 1B RS-485 bus 1 data line B
(19) RS-485 1A RS-485 bus 1 data line A
(20) SPARE Spare
(21) FAULT N/C Fault contacts
(22) AUX N/O Aux contacts
(23) PRE N/O Pre-Alarm contacts
(24) FIRE 1 N/O Fire 1 contacts
(25) FIRE 2 N/O Fire 2 contacts
(26) SPARE Spare
(27) INPUT 3 Remote input 3. Short pair to activate [1]
(28) INPUT 2 Remote input 2. Short pair to activate [1]
(29) INPUT 1 Remote input 1. Short pair to activate [1]
N/O = Normally Open
N/C = Normally Closed
[1] These connections can be used as the input terminals for main 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, i.e., they are open for
normal operation. The factory default setting is for supply monitoring on “I/P 1.” If Input 1 is not
being used for power supply monitoring, make sure that the Battery check function in the Remote
Control software is not checked (off) for EN 54-20 compliance. The Battery check function is
located in the Function settings menu, Power monitoring tab.
[2] These connections are used to connect a detector to an addressable Fire Panel when a
suitable Addressable Protocol Interface card is mounted to the “Addressable Interface” connector
on the left-hand edge of the detector main PCB. (Refer to “Interfacing with fire alarm panels” on
page 30 for more information on APIC cards.)
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