MODEL: SA-503HD-4   4-wire network heat detector Main feature: 1.SMT manufacture technology 2.Low standby current 3.Anti-RFI&anti-EMI 4.9V~35VDC wide operating voltage range 5.LED visible in 360 degrees direction 6.Power supply non-polar input 7.Remote LED indicator output(2 wire) 8.Execute criterion:GB4716;EN54-5;UL521 Technical specification: 1.Operating voltage:DC9V~35V 2.Static current:50uA 3.Alarm current:22mA 12V;40mA 24V 4.Alarm output:Relay output;LED indicator 5.Operating temperature:57℃(135°F) 6.Alarm temperature:-10℃~+50℃ 7.Dimension:Φ100*55mm