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Combustible gas alarm control unit HM930B
Overview

4 zones Bus Combustible gas alarm control unit



Microprocessor technology;

RS485 bus communication interface, can transmit 1200m without need for repeater;

Display time and alarm gas concentration in real time, user could adjust the time;

Disable function to gas detectors;

Detector sensitivity could be corrected remotely, zero point adjustment;

Four levels for concentration control: display, early warning, minor alarm, major alarm;

Can auto search for detectors;

LCD and digital tube display;

Auto protect from bus short circuit;

Store or enquire alarm records up to 999pcs, records no lose when power cut off;

Auto check malfunction;

Programmable outputs;


Specs
Product Model

HM-930B

Operating voltage AC220V±15%/50Hz
Standby power DC12/7.0Ah×2
Static current <45mA
Alarm current <300mA (without detectors)
Detection range 0%LEL~100%LEL
Precision <±3%LEL
Alarm Sound ≥85dB/1m
Capacity 4
Signal transmission RS485 bus communication
Signal transmission distance ≤1200m(2.5mm2×2)
Output

8 groups of programmable outputs; Contact rating:2A/DC24V or 4A/AC220V

Alarm mode Sound & flash alarm Relay output
Installation mode Wall mounted
Working environment -10℃~60℃(5%~95%RH)
Weight 7.6kg
Dimension 379mm*236.4mm*100mm
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