TRICONEX 3301S2 (DI3301 S2) 32-Channel Digital Input Module for Tricon Safety Instrumented System (SIS)

Product Description

The TRICONEX 3301S2 (DI3301 S2) is a high-reliability 32-channel digital input module, a core component of the TRICONEX Tricon triple modular redundant (TMR) safety instrumented system (SIS). Engineered for SIL 3-certified safety applications, it provides isolated, fail-safe signal acquisition from field devices (emergency stop buttons, pressure switches, limit switches, fire & gas detectors) in hazardous industrial environments. Built with TRICONEX’s patented TMR architecture, it eliminates single points of failure, while robust channel-level isolation and strong EMI immunity ensure stable operation in electrically noisy settings. The 3301S2 complies with IEC 61508 SIL 3, FM, CSA, and ATEX standards, supports hot-swappable maintenance, and incorporates advanced self-diagnostics (Force-to-Value Diagnostic, FVD) to monitor input integrity, making it an essential component for mission-critical safety interlock systems.

Key Functions

The TRICONEX 3301S2 module converts dry contact or low-level DC signals from field devices into digital logic signals for the Tricon SIS controller, enabling high-precision safety interlock monitoring. It provides 32 fully isolated channels (24V DC nominal, 15–30V DC operating range) to eliminate cross-talk and ground loops, with input delay<10ms for real-time response. Triple modular redundant signal processing and voting logic ensure that a single channel fault does not compromise system integrity, while built-in FVD diagnostics (<2ms/test) continuously monitor input continuity and signal validity, generating real-time alarms for open/short circuits or signal loss. The module supports hot-swappable replacement without system shutdown, maximizing uptime, and features LED status indicators for quick troubleshooting of channel-level faults.

Application Scenarios

The TRICONEX 3301S2 digital input module is deployed exclusively in safety-critical applications requiring SIL 3 certification and fault tolerance. In oil & gas facilities (offshore platforms, refineries, FPSOs), it monitors emergency shutdown (ESD) pushbuttons, pressure/temperature high/low alarms, and fire & gas detector signals to trigger safety interlocks. For chemical and petrochemical plants, it acquires data from reactor safety valve position switches, toxic gas leak detectors, and emergency vent system status sensors to mitigate explosion or leakage risks. In power generation (thermal, nuclear, renewable), it monitors turbine vibration switches, boiler water level alarms, and generator overcurrent protection signals to actuate emergency stop systems. The module is also used in pharmaceutical manufacturing for batch process safety interlocks, mining operations for hoist/conveyor emergency stop monitoring, and water/wastewater treatment plants for chemical dosing system interlocks—all scenarios where system failure could result in human harm, environmental damage, or catastrophic equipment loss.

Technical Specifications

• Global Inventory Network: 121 shared inventories worldwide, enabling direct procurement from overseas warehouses—supporting faster delivery and reduced logistics costs.
• Pricing & After-sales: Competitive prices paired with reliable after-sales warranty services.
• Customer Coverage: Serving clients across regions including the United States, Germany, Japan, South Korea, United Kingdom, France, Italy, Canada, Brazil, India, Australia, Russia, Spain, Netherlands, Switzerland, Sweden, Belgium, Austria, and Turkey.
• Product Quality Assurance: All products are brand new and original. Spare parts include a 1-year warranty, and all items undergo pre-delivery testing and certification.
• Discount Policy:
• Multi-product orders qualify for custom discounts (contact us for details).
• We offer further price adjustments if you receive a lower quote for identical products from other suppliers, tailored to your budget.