System Sensor R-10E Relay

The System Sensor R-10E is a panel-mount SPDT control relay that provides auxiliary switching and control functions in commercial fire alarm and building-management systems. Designed as a fire alarm interface module, it is commonly installed in fire alarm panels, smoke-detection systems, HVAC controls, and other commercial buildings to enable reliable interlocks and signaling between life-safety devices and building controls. The relay features a coil-operated design with screw-terminal connections housed in a flame-retardant enclosure and uses a SPDT contact configuration with a rating suitable for alarm and control circuits. It operates from 0 °C to +49 °C and is compatible with commercial fire alarm systems. The R-10E is intended for repair, retrofit, expansion, and replacement projects, and is commonly used in fire alarm control networks, ventilation shutdown circuits, and building management systems where dependable relay operation is required. It supports integration of fire protection with ventilation shutdown circuits and other building-management scenarios in commercial facilities. Common replacements include System Sensor R-10, R-2, and A77-716B.