The HSM2108 is an 8 zone expander for the DSC NEO. This module adds 8 hardwired zone terminals to your DSC NEO. You do not need this for wireless zones.

DSC PowerSeries NEO HSM2108 8-Hardwired Zone Expander Module

1 - HSM2108 Zone Expander
3 - Plastic standoffs
16 - 5.6K resistors

The HSM2108 is an 8-Hardwired zone expander that you can add to your DSC NEO security system if you need more hardwired zones than the initial zones that are on your main control panel. You can install the HSM2108 in the main cabinet or if you don't have room there then you can use one of DSC's expansion cabinets. This expander will connect to your DSC NEO's BUS terminals (Keypad connections) and it is compatible with the HS2016, HS2032, HS2064, and the HS2128.

Specifications:

Temperature range: -10 C to 55 C (0 C to 49 C for UL/ULC listed systems)
Relative Humidity: 93% non condensing
Input rating: 10.8 to 12.5 VDC/130 mA (provided by the alarm controller or separate power supply)
Board current draw: 40 mA
Board dimensions: 45mm x 92mm
VAUX output ratings: 10.8 to 12.5 VDC
Resettable fuse (PTD) used on circuit board instead of replaceable fuses
Maximum wire length from alarm panel: 1000'/305m (22AWG)