MIC2000 Multi-Channel Gas Alarm Controller for RS485 and 4-20mA Detectors

Overview

The MIC2000 Multi-Channel Gas Alarm Controller is designed for centralized monitoring, alarm management and control of fixed gas detection systems. It accepts both 4-20mA analog signals and RS485 digital signals, allowing multiple gas detectors and industrial transmitters to be connected to one central monitoring unit.

The controller can be configured with 1 to 32 channels of 4-20mA input while simultaneously communicating with up to 255 RS485 devices, depending on system configuration. In addition to gas detectors, compatible 4-20mA transmitters such as temperature, humidity, pressure, wind speed and dust sensors can also be integrated.

A 3.5-inch HD color screen displays real-time readings, alarm information and historical records. Multiple display modes, relay outputs, data storage and optional remote communication make the MIC2000 suitable for industrial plants requiring centralized safety supervision and automatic equipment control.

Key Features

• Supports simultaneous 4-20mA and RS485 signal input

• 1–32 configurable 4-20mA input channels

• Supports up to 255 RS485-connected devices

• Standard MODBUS communication

• 3.5-inch HD color display

• Chinese and English interface

• Compatible with gas, temperature, humidity, pressure, wind speed and dust transmitters

• Multiple selectable engineering units

• Large-capacity historical data recording

• User-defined data logging interval

• Local record viewing and deletion

• Three display modes for different monitoring requirements

• Real-time trend curve and historical graph display

• Three-stage audible and visual alarm

• Independent high and low alarm settings for each channel

• Standard relay control outputs

• Automatic open-circuit and short-circuit detection

• Optional Ethernet communication

• Optional PC monitoring software

• Optional remote wired or wireless transmission

• Optional backup DC24V power supply

Display and Data Management

The MIC2000 provides several screen layouts to make multi-channel monitoring easier.

Available display modes include:

• Six-channel simultaneous concentration display

• Single-channel large-font cyclic display

• Real-time trend curve

Channels can be switched automatically or manually. Maximum values, minimum values, gas names and historical trend information can also be displayed according to configuration.

The internal data logging function can store measurement values, alarm events and time information. Users can choose to record continuous concentration data or alarm events only.

Alarm and Relay Control

The controller provides multi-stage gas alarm management for connected detectors.

Each monitoring channel can be assigned independent alarm thresholds. When the measured concentration reaches a preset alarm level, the MIC2000 can activate:

• Audible alarm

• Visual alarm

• Relay output

• Ventilation fan

• Solenoid valve

• External warning device

• Other connected control equipment

Standard relay contacts support normally open and normally closed operation.

Communication and Remote Monitoring

The MIC2000 can communicate with external monitoring systems using standard industrial interfaces.

Supported or optional interfaces include:

• RS485

• MODBUS protocol

• 4-20mA output

• Ethernet

• RS232 conversion

• PC monitoring software

Remote transmission can be used to send real-time field data to a control room, monitoring computer or other centralized platform.

Depending on configuration, communication can be established through wired data transmission, LAN, Internet or wireless networks.

Technical Specifications

Supported Measurement Units

The controller supports multiple units for different detector and transmitter applications, including:

ppm, %LEL, %Vol, mg/m³, μg/L, pphm, °C, %RH, Pa, kg, PSI and m/s

Typical Applications

The MIC2000 is suitable for centralized monitoring systems in:

• Oil and gas facilities

• Petrochemical plants

• Chemical production

• Warehouses

• Gas storage areas

• Industrial workshops

• Power plants

• Wastewater treatment facilities

• Pharmaceutical production

• Laboratories

• Environmental monitoring projects

• Utility facilities

• Confined-space safety systems

Product Advantages

The MIC2000 combines multi-channel signal acquisition, centralized alarms, relay control, historical data storage and remote communication in one wall-mounted controller.

Its ability to accept both RS485 and 4-20mA signals makes it especially useful for mixed detector networks where different types of sensors and transmitters need to be managed through one central monitoring platform.