HD-503-4 (DC 9V ~ 35V) Wired Heat Detector with Relay

The HD-503-4 Wired Heat Detector with Relay is an advanced fire detection device designed to sense heat and trigger an alarm in environments prone to rising temperatures. It operates on a voltage range of DC 9V to 35V (with an option for DC 40V to 60V orders), ensuring broad compatibility. The device features a standby current of ≤50 µA for a 2-wire system and ≤50 µA (normally open) or ≤16 mA (normally closed) for a 4-wire system. In the event of a temperature rise to 57°C, the alarm triggers and is visually indicated by a red LED. The alarm current for a 2-wire configuration ranges from 20-25 mA at 12V and 40-50 mA at 24V. In a 4-wire system, the alarm current is ≤40 mA (normally open) and ≤20 mA (normally closed). It can be reset either by powering off or automatically. The detector offers remote LED output for a 2-wire setup and relay output for a 4-wire system, with a contact rating of 0.5A @ DC28V for the 4-wire configuration. Certified according to EN54-5:2008 standards and CE compliant, this heat detector guarantees reliability in fire safety systems. Its compact dimensions of Ø100.7 mm in diameter and 50.7 mm in height make it ideal for use in a wide range of installations.