Original Triconex 3721 SIL3 analog input module for Tricon SIS safety system, 32‑channel differential signal acquisition for petrochemical ESD spare parts.

Product Overview

3721 is Triconex TMR triple‑modular‑redundant analog input module, made in Mexico. It collects differential voltage analog signals for Tricon safety instrumented system, supports hot‑swap, widely used as maintenance spare part for oil‑gas and power plant ESD safety control.

Key Features

• 32‑channel differential analog input
• TMR triple modular redundancy, SIL3 safety certification
• 10ms fast update rate, high measurement accuracy
• Comprehensive channel and module fault diagnosis
• Hot‑swap replacement without system shutdown

• Front‑panel LED indicators for status check

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Technical Specifications

• Brand: Triconex (Schneider Electric)
• Model: 3721
• Series: Tricon SIS
• Country of Origin: Mexico
• Input Signal: 0‑5VDC / ‑5~+5VDC differential
• Channel Count: 32 channels
• Operating Temp: 0℃ ~ +60℃
• Storage Temp: ‑40℃ ~ +85℃
• Humidity: 5‑95% non‑condensing

• Protection: IP20 (cabinet installation)

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Compatibility

Compatible with Tricon SIS chassis and backplane. Safety project configuration required after replacement.