Edwards EST M500SF Supervise Control Module SIGA-IO and has optional relay and

and has optional relay and sounder bases

It provides either a two-wire or four-wire fault-tolerant Initiating Device Circuit (IDC) for normally-open-contact fire alarm and supervisory devices

The NCA-2 provides system control and display capabilities for all

and a QWERTY keypad

The microprocessor-controlled

Edwards EST M500SF Supervise Control Module SIGA-IO and has optional relay andMonitor and control modules can be used to supervise and activate sounders, strobes, door closers, pull stations, waterflow switches, conventional smoke detectors, and more. Each module is rigorously designed and tested for electromagnetic compatibility and environmental reliability, in many cases exceeding industry standards.