Photo-Thermal Smoke Detector HM/PSE/S2


The photoelectric smoke sensor delivers high responsiveness, reduced sensitivity to dust and false alarms resulting from ingress of insect and other debris. The plug-in unit uses sophisticated processing circuitry that incorporates smoothing filters to help eliminate transient environmental noise conditions that can be the cause of unwanted alarms. The devices are managed by embedded software running complex algorithms that further improve resilience to false alarms and improve detection speed. The HM/PSE/S2 optical smoke detector has two integral red LEDs that provide 360° local visual indication of the device status.


Mechanical specification

Model Description
Height 52 mm installed in B501AP base
Diameter 102 mm installed in B501AP base
Weight 97 g (inch.base)
Max Wire Gauge for Terminals 2.5 mm2
Color ivory

Electrical Specifications - Non-Isolated Product

Model Description
Operating Voltage Range 15 ... 32 V DC
Maximum Standby Current 200 µA @ 24 V DC (no communications) 300 µA @ 24 V DC (LED blink enabled, once every 5s)
LED Current 3.5 mA @ 24 V DC
Remote Output Voltage 22.5 V DC @ 24 V DC
Remote Output Current 10.8 mA @ 24 V DC
Additional loop resistance using the B501A typ 20 mohm (max 30 mohm)

Environmental Specifications

Model Description
Temperature Range -30°C ... +70°C

Approvals :

EN54-17 :2005.

EN54-7 : 2000+A1:2002+A2:2006.