Simplex 4098-9780 2-Wire Sensor Supervised Relay Base with connections for LED Indicator or Unsupervised Relay

The Simplex 4098-9780 is a 2-wire supervised relay base designed to work seamlessly with compatible Simplex addressable sensors in fire alarm and life safety systems. This relay base adds flexibility by allowing external devices to be controlled directly from the sensor, such as door holders, HVAC shutdowns, or notification appliances. It supports connections for an LED indicator or an unsupervised relay, giving installers clear visual status or added control options based on system needs. Built for reliable performance, the supervised relay ensures proper monitoring of connected circuits, helping maintain system integrity and code compliance. Its practical design makes installation straightforward while providing dependable operation in commercial and institutional environments where safety and accuracy matter most.