Honeywell Home 4232CBM Connected Building Module is designed to support VISTA security panels with a variety of Honeywell Home and third-party hardware and software products. This module is intended for applications such as home or building automation. It enables communication between products by providing high-speed RS232 and RS422 serial interfaces for connection to external systems and a standard four-wire ECP interface for connection to the security control panel. Access Control Module Main Features Package includes: 4232CBM, ECP cable, double-sided mounting tape and RS422 termination resistors (not required for all applications) Mounts directly in control panel cabinet using double-sided tape (included) Three-wire RS232 or four-wire RS422 interface to external equipment Four status LEDs for system troubleshooting Driver software is required to use this module; this software is provided separately. To obtain drivers, consult the third party vendor with whom you need to work. Dimensions: 3.75" W x 2.5" L x 0.875" D Current Drain: 50mA nominal, 75mA maximum Input Voltage: 8-12V (supplied from control panel’s ECP bus)