The SILENT-KNIGHT-SD500-ARM is an addressable relay module that lets IntelliKnight fire alarm control panels switch discrete contacts by code command.Outfitted with two sets of Form "C" contacts, the SD500-ARM gives you control of elevator recall, door closing, fan operation, auxiliary notification, and many other normally open and normally closed applications. Flexible relay programming allows for zone condition mapping. Also known as -Silent Knight (Honeywell) - SD500-ARM - Addressable Relay Module
