Technical Specifications Module Type: Thermocouple / mV Analog Input Fieldbus Module Channel Quantity: 8 input channels Input Signal: Multi‑type thermocouple signal, millivolt DC signal Communication Interface: I/A series redundant fieldbus Operating Power: 24 VDC Operating Temperature: 0 °C to +60 °C Storage Temperature: ‑40 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mounting: I/A series system rack installation Certifications: CE industrial DCS I/O module compliance
Functional Features Supports multiple standard thermocouple types and mV low‑voltage signal acquisition. Built‑in cold‑junction compensation function for thermocouple temperature measurement. Channel‑to‑channel galvanic isolation improves anti‑interference performance. Real‑time signal fault diagnosis, detects sensor open‑circuit abnormal status. Redundant fieldbus communication improves data transmission reliability.
Application Scenarios Applied in petrochemical, chemical, power plant and metallurgy DCS control system. Collects furnace, reactor, pipeline thermocouple temperature signals for process temperature monitoring and closed‑loop control.
Structural Characteristics Legacy Y‑shape form factor module housing for I/A rack installation. Gold‑plated back‑plane connector for fieldbus communication and power supply. Front‑panel LED status indicators for power, communication and channel fault alarm. Connects to field termination assembly via dedicated signal cable.
Working Principle Thermocouple or mV signal from field sensor is transmitted to FBM02 module. Internal circuit completes cold‑junction compensation processing, converts analog signal into digital value. Digital data is transmitted to control processor through redundant fieldbus bus, meanwhile module uploads channel fault diagnostic information.
Installation Requirements Install FBM02 module into designated slot of I/A series DCS rack. Complete mechanical locking to guarantee reliable back‑plane connection. Connect dedicated signal cable between FBM02 and matched field termination assembly. Configure thermocouple type and channel parameters in control system software after power‑on.
Usage Notes Thermocouple extension cable must adopt corresponding matching compensation wire. Avoid laying signal cable together with high‑power power cable to reduce interference. Do not hot‑swap module when rack is powered‑on.
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