Chapter 2: Installation and assembly
26 LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook
Item Name Description
(7) RS-485 2B RS-485 bus 2 data line B
(8) SCRN RS-485 bus 2 screen
(9) RS-485 1A RS-485 bus 1 data line A
(10) RS-485 1B RS-485 bus 1 data line B
(11) FIRE2 N/O Fire 2 contacts
(12) FIRE1 N/O Fire 1 contacts
(13) PRE N/O Pre-Alarm contacts
(14) AUX N/O Aux contacts
(15) FAULT N/C Fault contacts
(16) FAULT N/C Fault contacts
(17) AUX N/O Aux contacts
(18) PRE N/O Pre-Alarm contacts
(19) FIRE 1 N/O Fire 1 contacts
(20) FIRE 2 N/O Fire 2 contacts
(21) I/P1 Remote input 1, Short pair to activate [1]
(22) I/P1 Remote input 1, Short pair to activate [1]
(23) I/P2 Remote input 2, Short pair to activate [1]
(24) I/P2 Remote input 2, Short pair to activate [1]
(25) SPARE Spare connection
(26) RS-232 Tx RS-232-2 transmit line
(27) RS-232 Rx RS-232-2 receive line
(28) GND RS-232-2 earth
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.”
[2] These connections are used to connect a command module 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 command module main PCB. (Refer to “Interfacing with
fire alarm panels” on page 30 for more information on APIC cards.)
Connecting power cables
The following precautions should be taken only for those applications where the
system is required to meet EMC compliance requirements:
• 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 a ground stud on the detector chassis.
To Next Page
Loading...
