Original Triconex 3511 pulse input module with TMR architecture for speed & frequency measurement in Tricon safety instrumented system.

Product Overview

Triconex 3511 is an 8‑channel isolated pulse input module for Tricon SIS safety system, adopting TMR triple modular redundant fault‑tolerant architecture. It receives pulse signals from magnetic pickup sensors, completes high‑precision frequency counting and rotational speed measurement, widely applied for turbine, compressor rotating‑equipment monitoring. It serves as critical maintenance spare part for petrochemical, oil‑gas and power‑plant safety control systems.

Key Features

• 8 isolated pulse input channels for speed and frequency signal acquisition
• TMR triple modular redundant fault‑tolerant design with 2‑out‑of‑3 voting logic
• High measuring accuracy up to ±0.01% within 1000‑20000Hz frequency range
• Built‑in per‑channel fault diagnosis and front‑panel LED status indication
• Hot‑swappable, supports online replacement without system shutdown

• Complies with IEC 61508 SIL3 safety certification for safety‑critical applications

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Technical Specifications

• Brand: Triconex (Schneider Electric)
• Model: 3511
• Channel: 8‑channel isolated pulse input
• Frequency Range: 0.5Hz‑20000Hz
• Accuracy: ±0.01%(1000‑20000Hz)
• Safety Level: IEC 61508 SIL3
• Communication: TriBus backplane bus
• Operating Temp: 0℃ ~ +60℃
• Storage Temp: ‑40℃ ~ +85℃
• Humidity: 5‑95% non‑condensing

• Installation: Tricon rack mount

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Compatibility

Compatible with Tricon series SIS chassis and matched processor modules. System configuration download is required after module replacement.