echnical Specifications Input Signal Type: Thermocouple, RTD, millivolt signal, 4‑20mA current signal Voltage Input Range: ‑100 mV to +100 mV Current Input Range: 0‑24 mA DC RTD Resistance Input Range: 0 Ω to 400 Ω Channel Isolation Voltage: 500 V RMS Transient Surge Suppression: 1500 V Operating Power Supply: 24 VDC from system backplane bus Communication Protocol: Proprietary 2 Mbps HDLC fieldbus for I/A Series system Operating Temperature: ‑40 ℃ to +70 ℃ Storage Temperature: ‑50 ℃ to +85 ℃ Relative Humidity: 5%‑95%, non‑condensing Mechanical Dimension: Standard single‑slot plug‑in module for Foxboro I/A Series rack Certifications: CE, UL, ATEX, IEC 61508 functional safety compliance
Functional Features Supports multi‑channel universal analog signal acquisition for thermocouple, RTD, mV and 4‑20mA signals. Built‑in cold‑junction compensation for thermocouple temperature measurement.
Application Scenarios Process industry distributed control system(DCS). Petrochemical plant mixed‑signal measurement loops. Oil & gas site multi‑type sensor signal centralized acquisition cabinet. Chemical plant mixed temperature, flow, pressure signal collection. 
Structural Characteristics Standard single‑slot plug‑in structure matching Foxboro I/A Series rack. Front panel equipped with status LED indicators for power supply, channel fault and fieldbus communication. Universal multi‑function signal terminals are arranged on module front side for convenient wiring and maintenance work.
Working Principle Different‑type field analog signals flow into module through front‑side terminal connectors. Hardware filter circuit eliminates high‑frequency interference noise. Isolation circuit completes electrical isolation between field circuit and module internal logic circuit. According to per‑channel software configuration parameter, internal circuit switches corresponding signal conditioning path, completes cold‑junction compensation, RTD constant‑current excitation or current sampling function.
Installation Requirements Insert module into designated slot of Foxboro I/A Series standard rack. Ensure rack ground connection strictly complies with official system grounding specification. Field signal wiring must adopt shielded twisted‑pair cables; thermocouple channel uses matched compensation cable.
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