TRICONEX 3501TN2 32-Channel TMR Digital Input Module for Tricon SIS Safety System

Product Description

3501TN2 is a triple modular redundant (TMR) digital input card for Triconex Tricon safety instrumented systems, manufactured in USA. It provides 32 isolated 115V AC/DC input channels to collect emergency stop, valve position, flame detector and FGS interlock field signals.

Adopting full triple-circuit voting architecture, single channel or circuit fault won’t trigger system trip, eliminating single-point failure risk. Each channel comes with optical isolation and built-in comprehensive diagnostics to detect open circuits, short circuits and wiring failures. It supports hot-swap maintenance without system shutdown, widely used as critical spare for petrochemical, power and offshore ESD safety racks.

Technical Specifications

PN: 3501TN2, Manufacturer: Triconex (Schneider Electric), USA

Safety Grade: IEC 61508 SIL3, TÜV certified

Channel Quantity: 32 isolated digital input points

Input Signal: 115V AC / 115V DC wet contact

Isolation: Optical isolation between field circuit and backplane

Architecture: Full TMR triple redundant voting logic

Mount: Standard Tricon rack plug-in, hot-swappable

Operating Temp: -40℃ ~ +85℃

Humidity: 5%–95% non-condensing, conformal coated PCB

Weight: ~1.2kg

Supporting Software: Tristation 1131

Key Features

Full TMR triple redundant design ensures uninterrupted safety signal acquisition with fault voting.

32 high-density 115V AC/DC channels suit high-voltage field safety signal collection.

Built-in full channel self-diagnosis to quickly locate open/short wiring faults.

Optical isolation effectively suppresses field surge, EMI and ground loop interference.

Hot-swap design allows online module replacement without shutting down SIS safety system.

Front panel LED indicators for Pass, Fault and module running status for on-site troubleshooting.

Fully compatible with all Tricon series CPU, analog I/O and communication modules.

Rugged industrial hardware fits long-term 24/7 operation in turbine halls and offshore platforms.