System Sensor M501M Intelligent Addressable Mini Monitor ModuleThe System Sensor M501M Intelligent Addressable Mini Monitor Module is intended for use in intelligent, two wire systems where the individual address of each module is selected using rotary decade switches. It provides a two wire initiating circuit for normally open contact fire alarm and security devices. The M501M monitor module can be installed in a single gang junction box directly behind the monitored unit. Its small size and light weight allow

Use to cover 1-1/2” (38 mm) deep surface mounted boxes

The WFD20EXP is a waterflow detector for installation on 2" steel pipe

and automatically adjusts its sensitivity to compensate

The R-20T is a single 2 FORM–C (DPDT) relay with a red activation LED

The Simplex 4098-9791 TrueAlarm Supervised Relay Base is a 4-wire TrueAlarm Sensor Base with connections for Supervised Remote Relay (2098-9737) and for remote LED alarm indicator

The EST3 Control Display modules provide the emergency user with the simplest of interfaces

— Powered from 24 VDC or from a compatible Notification Appliance Circuit (NAC)

thermistor based design to provide temperature sensing that quickly

— 2099-9804 Replacement break-rod

bright white color

or 100-watt single channel with 50-watt backup when paired with the EVS-100WBU

Additional Four Circuit NAC Module