The Notifier FMM-101 is a miniature intelligent addressable monitor module designed to supervise a Style B (Class B) circuit of normally open dry-contact initiating devices. Its compact design allows installation inside a single-gang junction box or directly behind the monitored device. The module communicates through the two-wire SLC loop, uses rotary switches for address selection, and requires no additional power. It is suitable for monitoring manual fire alarm pull stations, waterflow devices, conventional detectors, supervisory devices, and other compatible dry-contact inputs in Notifier fire alarm systems.