This module is specially designed for collecting industrial thermocouple weak millivolt signals, supporting K, S, B, E, J, T, R and other mainstream thermocouple types. It integrates low-noise front-end amplification, cold junction temperature compensation, multi-stage galvanic isolation and optimized high-precision temperature conversion algorithms, converting tiny thermoelectric potential signals into stable digital temperature data and uploading to the DCS main controller. Compared with the G01 base version, G02 upgrades low-drift signal amplifiers, optimizes built-in cold junction compensation algorithm to reduce ambient temperature measurement deviation, strengthens weak millivolt signal anti-interference capability, and optimizes long cable noise suppression for on-site long-distance thermocouple wiring. Each channel adopts fully independent isolation circuit to eliminate cross-channel signal crosstalk.

The circuit board adopts multi-layer high-temperature resistant FR-4 industrial PCB with fully enclosed 360° electromagnetic shielding layout. Every signal channel provides 1000V AC/DC galvanic isolation between field wiring terminals and internal logic circuits, which effectively filters severe electromagnetic noise generated by inverters, high-voltage switchgears and large rotating machinery in thermal power, petrochemical, metallurgical heavy industrial sites. All finished boards pass comprehensive full-process factory reliability tests, including 72-hour high-low temperature cyclic aging test, full-channel thermocouple precision calibration, long-term full-load MRC Link bus communication burn-in and sensor open/short-circuit fault simulation test. It supports single-slot hot-swappable installation without shutting down the entire DCS system, and integrates multi-level hardware protection circuits: surge suppression, overvoltage protection, overcurrent protection, reverse polarity prevention and short-circuit protection. Independent LED diagnostic indicators display power supply status, bus link state and single-channel thermocouple open/short fault alarms for fast on-site fault location, greatly improving long-term measurement accuracy and continuous operation stability of high-temperature furnace, pipeline thermocouple temperature monitoring.

Medium and super-large thermal power plant Ovation WDPF distributed control systems, multi-unit integrated petrochemical high-temperature furnace temperature acquisition cabinets, metallurgical factory smelting furnace, heating pipeline thermocouple monitoring stations, multi-station automatic control systems of large municipal wastewater incineration plants, whole-plant high-temperature equipment signal acquisition racks for pulp & paper factories, multi-rack redundant central control rooms of traditional heavy industry, high-temperature parameter remote monitoring automation platforms for energy & chemical continuous production lines, centralized DCS monitoring control systems for large-scale distributed energy storage power stations