Section 2: Installation
2.5 Installing modules
Remove all power from the system while connecting modules to the alarm controller.
Zone expanders
The main alarm controller has connection terminals for zones 1 to 8. Additional HSM2108 and HSM3408 zone expanders may be
added to increase the number of zones on the system. Each zone expander consists of one group of 8 zones. At enrollment, the zone
expander is automatically assigned to the next available 8-zone expander slot/Corbus expander slot. Connect the RED, BLK, YEL
and GRN terminals to the Corbus terminals on the alarm panel. Board current draw: 30 mA.
Figure 2-22: HSM2108 zone expander
SERIAL NUMBER
LED
SWITCH
Figure 2-23: HSM3408 8-zone expansion
SERIAL NUMBER
CORBUS
RED BLK YEL GRN
TAM
+ -
I/O
1 COM 2
I/O
3 COM 4
I/O
5 COM 6
I/O
7 COM 8
U
A7
1
9
STATUS
AUX
+ +
Refer to the HSM2108 and HSM3408 installation sheets for more information.
2-way audio module
The HSM2955 2-way audio module provides Talk/Listen-in capability for the audio verification of alarms. The main alarm controller
has a 3-pin analog audio link interface to connect the module.
Figure 2-24: HSM2955 2-way audio module
UA620
AOUT GND AIN
RED BLK YEL GRN
AUX COM TAM M1 M2 M3 M4 1 SPK 2
RNG TIP R-1 T-1 EGND
AOUT GND AIN
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