SR-503 Heat detector – Fire security factory more than 15 year

2 wire & 4 wire optional;

Category: Heat detector

General Details

Heat detector:

Heat detector SR-503 Series

SR-503-2 2-Wire network heat detector

SR-503-4 4-Wire network heat detector

Main Features:

Combination rate-of-rise and fixed temperature alarm

MCU processing, eliminate false alarm

Low standby current

Anti-RFI &Anti-EMI

9-35VDC wide operating voltage range

LED flashing visible in 360 degrees direction

Power supply non-polar input

Remote LED indicator output (2 wire)

Rustproof, mothproof, anti-light interference design

Execute criterion: GB4716, EN54-5

Technological details

Model No.	SR-503-2	SR-503-4
Operating voltage	DC 9V-35V
Static current	≤50uA	12mA(NC);2 mA (NO)
Alarm current	35mA(12V); 83 mA (24V)	5mA(NC); 15 mA (NO)
Alarm output	Remote LED indicator	Relay output
Alarm temperature	Rate-of-rise alarm: temperature rising rate>8℃	Fixed temperature alarms: 57℃(135℉)
Installation	Ceiling mounted
Working environment	-10℃～+50℃, Humidity ≤95%RH	-10℃～+70℃
Dimension	Ф100*48mm