Edwards LaserSense HSSD-2

Chapter 2: Installation and assembly
LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook 25
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 shielded (screened)
and of sufficient current-carrying capacity. Signal cable should be 120 volt
screened twisted pair such as Belden 9841 24AWG. Power and signal cables
should enter the detector via metal cable glands.
Figure 15 below shows the terminal block connections for the command module.
Figure 15 : Command module terminal block connections
Item Name Description
(1) BUS H2 Addressable bus 2 high o/p [2]
(2) BUS L2 Addressable bus 2 low o/p [2]
(3) BUS H1 Addressable bus 1 high o/p [2]
(4) BUS L1 Addressable bus 1 low o/p [2]
(5) SCRN RS-485 bus 1 screen
(6) RS-485 2A RS-485 bus 2 data line A