This module is dedicated to collecting weak millivolt thermoelectric potential signals from industrial thermocouples, compatible with K, S, B, E, J, T, R and all mainstream thermocouple models. It integrates military-grade ultra-low-noise signal amplification, high-precision intelligent cold junction compensation, three-stage cascaded reinforced galvanic isolation and optimized full-range temperature conversion algorithm, converting tiny thermocouple voltage signals into stable, high-repeatability digital temperature data and uploading to the DCS main controller.Compared with G01 and G02 predecessors, G03 upgrades low-drift instrumentation amplifiers to further suppress signal drift under wide ambient temperature fluctuation; adopts multi-point distributed cold junction compensation algorithm to eliminate measurement errors caused by uneven cabinet temperature; adds multi-level composite EMI suppression circuits, greatly improving anti-interference performance for ultra-long-distance thermocouple wiring in strong electromagnetic industrial environments. Each channel is equipped with fully independent isolation loops to completely avoid cross-channel signal crosstalk.

The circuit board adopts multi-layer high-temperature resistant FR-4 industrial PCB with 360° fully enclosed electromagnetic shielding layout. Every signal channel achieves 1000V AC/DC reinforced galvanic isolation between field wiring terminals and internal logic circuits, effectively isolating surge interference, common-mode noise and electromagnetic radiation generated by inverters, high-voltage switchgears and large rotating equipment in thermal power, petrochemical and metallurgical heavy industrial sites.All finished boards pass full-lifecycle strict factory reliability verification, including 72-hour high-low temperature cyclic aging test, full-channel thermocouple full-range precision calibration, long-duration full-load MRC Link bus continuous burn-in test, and comprehensive sensor open-circuit/short-circuit wiring fault simulation test.It supports single-slot hot-swappable online replacement without shutting down the entire DCS system, and integrates multi-layer comprehensive hardware protection: 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 alarms, enabling rapid on-site fault location and troubleshooting, significantly boosting long-term measurement accuracy and continuous stable operation 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