Technical Specifications PLC: GE Series90‑30 Input Channel: Multi‑channel thermocouple input Supported Sensor Type: J, K, T, E type thermocouple Cold‑junction compensation: Built‑in automatic cold‑junction compensation Operating Temperature: 0℃ ~ +60℃
Functional Features Direct thermocouple signal acquisition. Automatic cold‑junction compensation. Open‑circuit sensor detection. Channel‑by‑channel sensor type configuration.
Application Scenarios Furnace temperature monitoring, heat‑treatment equipment, chemical plant temperature measurement, Series90‑30 temperature control system.
Performance Parameters Temperature conversion accuracy: Industrial grade temperature precision
Structural Characteristics Series90‑30 rack module, front‑end wiring terminals, LED status indicator, backplane gold‑plated connector.
Working Principle Thermocouple weak millivolt signal enters module, after cold‑junction compensation and amplification, ADC converts to digital temperature value, upload to PLC CPU.
Installation Requirements Install in PLC rack slot. Thermocouple shall use special compensation cable. Keep cabinet ambient temperature stable.
Usage Notes Select corresponding sensor type for each channel inside programming software. Prevent compensation cable mixing with ordinary copper wire.
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