Original Triconex 3503E 32‑channel digital input module with TMR architecture for Tricon safety instrumented system.

Product Overview

Triconex 3503E is a 32‑channel digital input module for Tricon SIS safety system, adopting TMR triple modular redundant fault‑tolerant architecture. It collects 24VDC discrete signals from field switches, emergency stop buttons and discrete sensors, transmits valid status data to main processor via TriBus backplane bus. It supports comprehensive channel self‑diagnosis, widely used as maintenance spare part for ESD, interlock and burner management systems in petrochemical, oil‑gas and power plant.

Key Features

• 32‑channel digital input for 24VDC field discrete signal acquisition
• TMR triple modular redundant fault‑tolerant design with 2‑out‑of‑3 voting logic
• 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

• Channel group isolation enhances anti‑interference performance for field wiring

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Technical Specifications

• Brand: Triconex (Schneider Electric)
• Model: 3503E
• Channel: 32‑channel digital input
• Field Input Voltage: 20‑42.5VDC
• 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.