Technical Specifications Multi‑channel RTD resistance input interface. Supports Pt100, Pt1000 standard RTD sensors. Auxiliary power supply 24 V DC. Typical power consumption 4.5 W. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Channel‑to‑back‑plane isolation voltage 1500 V AC. Protection grade IP20.
Functional Features Converts resistance signal from field RTD sensors into digital temperature value. Front‑panel LED indicators display channel running and fault status. Built‑in wire‑break detection function for sensor loop. Supports hot‑swap operation under system permitted condition. Transmits temperature data to controller through back‑plane bus.
Application Scenarios Applied for temperature measurement in power plant, chemical and metallurgical automation systems. Used for collecting temperature signal of motor, pipeline and equipment. Suitable for new project construction and spare‑part replacement.
Performance Parameters High‑precision resistance‑to‑temperature conversion. Sensor wire‑break fault can be detected accurately. Each channel works independently without mutual interference.
Material Composition Glass‑fiber epoxy printed circuit board. Resistance‑to‑digital conversion chip, galvanic isolation components. Reinforced plastic front‑panel housing. Copper‑alloy back‑plane plug‑in contact pieces.
Structural Characteristics Standard rack‑mount plug‑in module structure. Front panel equipped with LED status indicators. Rear side connects rack back‑plane bus. Matching termination base provides field sensor wiring terminals.
Working Principle After power‑on, module executes hardware self‑check. It applies constant current excitation to connected RTD sensors. Internal circuit samples resistance variation and converts resistance value into digital temperature data. Processed temperature data is uploaded to controller via back‑plane bus.
Installation Requirements Insert TR104 module into designated rack slot and tighten locking screw. Install matched termination base and complete RTD sensor cable wiring. Connect 24 V DC auxiliary power supply. Ensure cabinet protective grounding.
Usage Notes Adopt anti‑static protection during handling. Use matched three‑wire or four‑wire RTD cables according to sensor type. Separate sensor cables from high‑voltage power cables.
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