DSC HS2128 Reference Manual page 18

3.1.1 Zone Expander
The main alarm controller has connection terminals for zones 1 to 8. Additional HSM2108 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 zone slot. Connect the RED, BLK, YEL and GRN terminals to the
Corbus terminals on the alarm panel. Board current draw: 30mA.
Figure 3-1 HSM2108 Zone Expander
Refer to the HSM2108 installation sheet for more information.
3.1.2 Output Expander
The HSM2208 module is used to add up to 8 low-current programmable outputs to the alarm system.
The 4-wire Corbus connection is used by the panel to communicate with the module. Connect the RED, BLK, YEL and GRN
terminals to the Corbus terminals on the alarm panel. Board current draw: 40mA.
Figure 3-2 HSM2208 Output Expander
3.1.3 Wireless Transceiver Module
The HSM2HOSTx 2-way wireless integration module provides communication between wireless devices and the alarm con-
troller.
Connect the HSM2HOSTx to the 4-wire Corbus of the alarm controller according to the following diagram.
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