SD-604-4L (DC 9V ~ 35V) Wired Smoke Detector With Relay & Reed Switch

The SD-604-4L Wired Smoke Detector with Relay & Reed Switch is an advanced smoke detection device designed to meet the EN54-7:2008 standard and certified with CE approval. It operates within a voltage range of DC 9V to 35V, with the capability to support higher voltages up to DC 40-60V, making it suitable for various applications. This detector boasts a low standby current, drawing less than 50 µA in both 2-wire and 4-wire configurations. In alarm mode, it consumes 20-25 mA at 12V and 40-50 mA at 24V for 2-wire setups. For 4-wire systems, it allows for up to 25-30 mA for normally open (NO) relay contacts and 20 mA for normally closed (NC) contacts. An integrated red LED provides visual indication during alarm conditions, while the unit can be reset either by power cycling or automatically. The alarm output includes a remote LED for 2-wire configurations and a relay output for 4-wire systems, with a contact rating of 0.5A at DC 28V for 4-wire setups. With a sensitivity range of 0.08-0.16 dB/m (±0.1 dB/m), the SD-604-4L ensures effective smoke detection. Its compact design, measuring Ø99 mm x 43.5 mm, features a reed switch for testing, which enhances usability and maintenance efficiency.