The AEXIN from Elk Products is a 16 zone input expander for the E27 Alarm Engine. Up to 7 of the AEXIN can be used to increase zones on the E27 to 128. Operates from a 4 wire data bus and has DC power and battery connections. 
Features
- 16 EOL Resistor Supervised Hardwire Zones
 
- DIP switch selectable EOL resistance values (1.0K, 2.2K, or 3.3K)
 
- 1 Form "C" Relay Output
 
- DC power & battery connections
 
- Operates on the 4-Wire Data Bus
 
- Plug-In Terminal Strips
 
- Status and Diagnostic LED
 
- On-Board EOL Bus Termination Jumper
 
- Vertical Mounting using ELK-SWG Glides(included)