Edwards 3-RS485B Network Communications Card SF 01/12 The S1209 smoke alarms are

The S1209 smoke alarms are ANSI/UL 217 and are warranted for one year from date of purchase

Thunderbird Storm 2011-2017

as well as fast flaming fires

They mount onto the hinges of option cards and can be installed in any of the three option card spaces on the control panel electronics chassis

Edwards 3-RS485B Network Communications Card SF 01/12 The S1209 smoke alarms areThe Network Communications card mounts to the back of the Central Processor Unit. The 3 RS485A card provides a Class A (Style 7) or Class B (Style 4) circuit for network communications signals. And two additional Class A (Style 7) circuits for the digitized audio signals. The 3 RS485B card provides a Class B (Style 4) or Class A (Style 7) circuit for network communications signals. And a second Class B (Style 4) circuit for the digitized audio