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Stratos HSSD-2 • INSTALLER’S HANDBOOK • Iss. 12
5.3 Electrical
installation
5.3.1 Detector
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 car-
rying 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.
* 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, 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 software is not checked
(off) for EN54-20 compliance. The Battery check function is located in the Function settings menu, Power monitoring tab.
†
These connections are used to connect a detector to an addressable Fire Panel w
hen a suitable Universal Addressable
Interface card (see section 8.4) is fitted to the 'Addressable Interface connector on the left hand edge of the detector main PCB.
N/O = Normally open
N/C = Normally closed
Remote input 1
Short pair to activate*
Remote input 2
Short pair to activate*
Remote input 3
Short pair to activate*
Spare
N/O Fire 2 contacts
N/O Fire 1 contacts
N/O Pre-Alarm contacts
N/O Aux. contacts
N/C Fault contacts
Spare
RS485 bus 1 data line A
RS485 bus 1 data line B
RS485 bus 1 screen
Addressable bus 2 high o/p
†
Addressable bus 2 low o/p
†
Addressable bus 1 high o/p
†
Addressable bus 1 low o/p
†
Spare
Spare
Spare
N/O Fire 2 contacts
N/O Fire 1 contacts
N/O Pre-Alarm contacts
N/O Aux contacts
N/C Fault contacts
RS485 bus 2 data line A
RS485 bus 2 data line B
RS485 bus 2 screen
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