AS-901-IOM is an intelligent analogue addressable input-output 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-IOM 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 and and control a single ancillary circuit using a set of volt-free changeover relay contacts.