This standard defines the SIA protocol for addressable multiplex, sensor, control and annunciation modules for Security and Life Safety systems. This protocol utilizes two way digital transmission scheme, which can be implemented at low cost over a two wire trunk. The trunk also supplies power to the remote devices.
The protocol command set and response data allows highly reliable, error resistant transport of both analog and digital messages with fast response mode for any sensor or device in the alarm condition.
Devices may be interfaced to the trunk in any order in a single ended or loop configurations.
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