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Henan Otywell Electronic Technology Co., Ltd.

GDB12 Gas Alarm Controller

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GDB12 Gas Alarm Controller

GDB12 Gas Alarm Controller

Coordinate 4–20 mA detector inputs with visible alarms, output control and event review.

  • Collect signals from the field

    The listed four-channel 4–20 mA interface brings detector signals to one controller for monitoring.

  • Turn a reading into a response

    Adjustable setpoints, built-in alarm indication and switch or pulse outputs support the planned site response.

  • Find the cause after an event

    Alarm and fault records, system diagnostics and RS-485 transmission support operator review and integration.

Confirm input count, detector signal, output wiring and power arrangement before specifying the controller.

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Overview

The GDB12 gas alarm controller monitors gas concentrations in ambient air, compatible with various gas types and enabling centralized control across multiple points. Featuring a microprocessor control unit, it displays real-time gas concentration on the screen. When detected concentrations reach or exceed preset alarm thresholds, the controller activates audible and visual alerts. Equipped with multiple passive contact sets and independent AC220V/DC24V pulse outputs, it drives ventilation systems or closes electromagnetic valves. The controller also includes backup battery support for enhanced reliability. The controller is widely used in industrial and commercial gas leakage detection and monitoring, can effectively prevent poisoning accidents, explosion and fire, so as to ensure the safety of life and property. The design, manufacture and verification of this product comply with the following national standards: GB 12358—2024 Workplace Environmental Gas Detection and Alarm Instruments General Technical Requirements

Key Features

Detector Inputs & Processing

  • 4-Channel 4-20mA Signal Input Interface, Compatible with 4-20mA Gas Detectors
  • It supports real-time sampling of detector signals and real-time data calculation
  • It can manage and process detectors with different gas types, ranges, and data units.

Alarm Logic & Response

  • Customizable Alarm Setpoints
  • System self-diagnosis, power management, alarm display, and peripheral driver functions
  • Manual Reset & Mute

Outputs & Remote Links

  • It has two sets of digital control outputs and two sets of pulse signal outputs, which is convenient for external linkage control devices.
  • The system features an upload interface that enables real-time data transmission via RS-485 signals, meeting the needs of most clients.
  • 2-Channel Switch Quantity Output
  • 2-Channel Active Output (220V Pulse & 24V Pulse)
  • OEM & ODM & OBM ；Optional 4G Cloud Upload

Event Records

  • History storage for easy retrieval
  • Alarm & Fault Record Storage

Operator Controls

  • Customizable Device Time
  • Built-in microprocessor with rich software features
  • Digital Display
  • Button Operation
  • Password Management

Power & Installation

  • The controller is easy to operate and the whole machine is light
  • The installation is simple. Just fix the bracket on the wall and hang the controller.
  • Manual screw cap design
  • Automatic Main/Backup Power Switching
  • Key Functions：

Technical Specifications

Installation method  wall-mounted
Use environment  indoor use
Working voltage  AC220V
Rated power  2W/channel
Working current  0.01A/channel
Full load working current  (connected to detector) 0.03A/channel
Backup power specification  24VDC, 1.3Ah (non-standard)
Display mode  four-channel digital direct display, sound and light alarm
Alarm segment  high and low limit alarm, fault alarm
Alarm mode  sound alarm, LED light indication
Communication method  standard RS485 output
Relay output  two passive switch quantities; – – one DC24V pulse control contact; one AC220V pulse control;
Relay output  contact capacity 3A, 250VAC
Working environment temperature  -10°C~ 55°C
Working environment humidity  10~95% RH (non-condensing)
Working environment pressure  86~106Kpa
Storage conditions  -20°C~70°C, 10~95 %RH (non-condensing)
 Cable requirements three-wire 3*1.5mm2
 Size  295*226*85(mm)
 Other accessories  Standard mounting plate and medium 8 anchor bolts

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Tell us the installation, detector and alarm requirements. Confirm input count, detector signal, output wiring and power arrangement before specifying the controller.

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