The MIC2000 series from Beijing Zetron Technology provides centralized gas detection monitoring and alarm control for industrial safety applications. Supporting up to 32 channels of 4-20mA and RS485 input simultaneously, the controller integrates toxic, combustible, and oxygen detectors with temperature, humidity, and pressure transmitters into a single monitoring station with a 3.5-inch color LCD.

How many channels can the MIC2000 monitor, and what input types does it accept?

The controller accepts 1 to 32 channels of 4-20mA analog input alongside RS485 digital input — up to 255 RS485 probes can be connected on a single bus. This dual-protocol architecture allows mixing conventional 4-20mA gas detectors with addressable RS485 sensors, pressure transmitters, or wall-mount NDIR detectors on the same controller. Channel expansion is modular — controllers can be interconnected for larger installations.

How does the three-level alarm system work?

Each input channel supports independent high-limit and low-limit alarm thresholds with three severity levels. When a threshold is breached, the controller triggers audible and visual alarms on its front panel while activating the corresponding relay output. Four standard relay groups (NO/NC, 3A at 32VDC or 3A at 220VAC) provide per-channel control, with a dedicated public alarm relay rated at 12A for master shutdown or external annunciation. Relay outputs are expandable to 16 channels for complex multi-zone installations.

What communication and data logging options are available?

Standard MODBUS RTU output enables integration with PLC, DCS, and SCADA systems. An optional Ethernet module adds TCP/IP connectivity for remote monitoring via PC software, which supports 24-hour continuous data collection, historical trend curves, alarm analysis, and report export. Onboard data logging stores over 100,000 records with configurable intervals, supporting SD card and USB storage for offline retrieval. Wireless transmission options (2 km, 5 km, or unlimited) are available for remote or inaccessible sites.