This module is specially developed for capturing weak millivolt thermoelectric potential signals of industrial thermocouples, compatible with K, S, B, E, J, T, R and all mainstream standard thermocouple types. It adopts military-grade ultra-low-noise instrumentation amplifier, multi-point distributed intelligent cold junction compensation, three-stage cascaded reinforced galvanic isolation and self-learning full-range temperature conversion algorithm, converting tiny thermocouple voltage signals into ultra-stable, high-repeatability digital temperature data and transmitting to the DCS main controller.Compared with G01~G04 previous revisions, G05 equips ultra-wide temperature low-drift amplifier chips to minimize zero drift and gain drift under extreme temperature fluctuations; optimizes multi-point cabinet cold junction self-calibration algorithm to eliminate measurement deviation caused by uneven cabinet internal temperature; adds multi-level composite EMI/EMC suppression circuit, drastically enhances anti-interference performance for ultra-long-distance thermocouple wiring in heavy industrial environments with strong electromagnetic radiation such as inverters, high-voltage switchgears and large rotating equipment. Each signal channel adopts fully independent isolation loop to completely eliminate cross-channel signal crosstalk and mutual interference.

The circuit board adopts multi-layer high-temperature resistant FR-4 industrial PCB with 360° fully enclosed electromagnetic shielding structure. Every signal channel realizes 1000V AC/DC reinforced galvanic isolation between field wiring terminals and internal logic circuits, effectively blocking surge, common-mode noise and high-frequency electromagnetic interference in thermal power, petrochemical, metallurgy and other heavy industrial sites.All finished boards pass full-lifecycle strict factory reliability verification, including 72-hour high-low temperature cyclic aging test, full-channel full-range thermocouple precision calibration, long-duration full-load MRC Link bus continuous burn-in test, and comprehensive sensor open-circuit, short-circuit and wiring fault simulation test.It supports single-slot hot-swappable online replacement without powering down the entire DCS system, and integrates multi-layer comprehensive hardware protection functions: surge suppression, overvoltage protection, overcurrent protection, reverse polarity prevention and short-circuit protection. Independent LED diagnostic indicators separately display power supply status, bus communication link status and single-channel thermocouple fault alarm information, realizing fast on-site fault location and troubleshooting, greatly improving long-term measurement accuracy and continuous stable operation performance of high-temperature furnace, kiln and pipeline temperature monitoring links.

Medium and super-large thermal power plant Ovation WDPF distributed control systems, multi-unit integrated petrochemical high-temperature reactor & furnace temperature acquisition cabinets, metallurgical smelting furnace, heating pipeline thermocouple monitoring stations, large municipal waste incineration plant automatic control systems, pulp & paper factory high-temperature drying equipment signal acquisition racks, 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