The MS-4 is compatible with the new I3 smoke detectors from System Sensor, and provide such advanced features as drift compensation, maintenance alert, and freeze warning. Automatic synchronization of audio/visual devices is provided, using manufacturer protocol for System Sensor, Wheelock and Gentex appliances. The NAC protocol includes the ability to silence audible devices while strobes continue to flash, using only a single pair of wires.
The MS-4 also is compatible with conventional input devices such as two- and four-wire smoke detectors, pull stations, waterflow devices, tamper switches and other normally-open contact devices.
- 120 VAC, 50/60 Hz, 2.3 A
- Four Style B (Class B) Initiating Device Circuits (IDCs)
- Two Style Y (Class B) NACs
- Optional module that converts all four IDCs and two NACs to Class A operation
- 24 VDC