AS-901-MM is an intelligent analogue single supervised input module and part of Series-900 Intelligent Analog Addressable Fire Detection and Alarm System. The Series 900 system utilizes the intelligent digital communication protocol through which reliable and fast operation is achieved for an impressive 240 device loop capacity. The AS-901-MM is mounted on a standard faceplate and can be used with a surface back box or flush mounted. It provides the capability to remotely monitor a single circuit for fault and alarm condition