MIC2000 RS485 and 4-20mA Gas Monitoring Controller for Fixed Detection Systems

Overview

The MIC2000 RS485 and 4-20mA Gas Monitoring Controller is designed as the central control unit for distributed fixed gas detection installations. It collects field data from connected detectors, displays real-time readings, processes alarm conditions and controls external equipment through relay outputs.

Both RS485 digital communication and 4-20mA analog inputs can operate within the same system. This gives system integrators greater flexibility when building gas monitoring networks using different detector types or other industrial transmitters.

The MIC2000 is especially suited to projects requiring centralized supervision of many detection points, historical event recording and connection to higher-level control or monitoring platforms.

System Capability

• 1 to 32 analog 4-20mA channels
• Up to 255 RS485 devices
• Multiple controllers communicating within one system
• Four standard relay control groups
• Additional control channels when required
• Optional analog output
• Optional Ethernet connectivity
• Optional computer monitoring

Monitoring Interface

The controller uses a 3.5-inch color LCD with configurable display layouts.

Operators can monitor several channels simultaneously or enlarge one monitoring point for easier viewing.

Available display content can include:

• Current concentration
• Gas or parameter name
• Maximum value
• Minimum value
• Alarm status
• Real-time concentration curve
• Historical trend curve

Automatic cycling is useful for installations containing many monitoring channels, while manual selection allows operators to focus on a specific detector.

Alarm Management

The MIC2000 uses three-stage alarm logic.

Each circuit can be assigned its own high and low limits, allowing different alarm settings for different gases or applications.

When alarm conditions occur, the controller can trigger local sound and light warnings while switching connected relay circuits.

Possible relay-controlled equipment includes:

• Exhaust fans
• Ventilation systems
• Solenoid valves
• Gas shutoff equipment
• Beacons
• Sirens
• Other safety interlocks

Data Logging

Measurement and alarm information can be stored internally for later review.

Users can define the data recording interval and choose between:

• Continuous concentration logging
• Alarm-event-only recording

Stored records can be displayed directly on the controller and selectively reviewed or deleted.

Communication Options

Standard Communication

• RS485
• MODBUS protocol

Optional Interfaces

• 4-20mA output
• Ethernet
• RS485/RS232 converter
• USB/RS232 cable
• PC software

These options allow the controller to communicate with industrial automation systems and remote monitoring platforms.

Technical Data

Enclosure Dimensions

Industrial Applications

The MIC2000 can be integrated into fixed detection projects for:

• Combustible gas monitoring
• Toxic gas monitoring
• Oxygen deficiency monitoring
• Environmental parameter monitoring
• Tank farms
• Chemical processing areas
• Gas cylinder storage
• Production workshops
• Utility areas
• Waste treatment plants
• Industrial ventilation control
• Central safety monitoring rooms

System Benefits

The MIC2000 provides a scalable platform for projects where numerous detectors must be monitored from one location.

Its combination of analog input, digital communication, local alarm processing and external equipment control makes it suitable for both small fixed installations and larger distributed gas monitoring networks.