TRICONEX 3720 TMR Modbus Plus Communication Interface Module for Tricon Safety Instrumented System (SIS)

Product Description

The TRICONEX 3720 is a high-reliability Triple Modular Redundant (TMR) Modbus Plus (Modbus+) communication interface module, a core component of the TRICONEX Tricon safety instrumented system (SIS). Engineered for SIL 3-certified safety applications, it provides a fault-tolerant Modbus Plus interface to connect the Tricon SIS to legacy DCS, HMI, and third-party industrial control systems while maintaining TMR fault tolerance and safety integrity. The 3720 supports Modbus Plus protocol for both safety and non-safety data exchange, with built-in TMR voting for communication data integrity, redundant network connections, and advanced diagnostics to monitor network health, port status, and module operation. It complies with IEC 61508 SIL 3, FM, CSA, and ATEX standards, supports hot-swappable maintenance, and features robust EMI/RFI immunity to ensure stable operation in electrically noisy industrial environments, making it an essential component for mission-critical safety system integration with legacy Modbus Plus networks.

Key Functions

The TRICONEX 3720 module enables seamless, fault-tolerant Modbus Plus communication between the Tricon SIS and legacy industrial control systems, supporting both safety-critical data exchange and non-safety process monitoring. It implements a TMR architecture with three independent Modbus Plus controllers voting on data integrity to eliminate single points of failure. Redundant network ports allow connection to dual Modbus Plus networks for maximum availability, with automatic failover in case of a network or port fault. The module acts as a Modbus Plus node, supporting both master and slave modes for flexible data exchange, and built-in diagnostics monitor network link status, packet error rate, TMR voting errors, and protocol-specific faults, generating real-time alarms for proactive maintenance. Hot-swappable design allows module replacement without SIS shutdown, maximizing system uptime, and LED status indicators enable quick troubleshooting of communication faults.

Application Scenarios

The TRICONEX 3720 Modbus Plus communication module is deployed exclusively in safety-critical applications requiring SIL 3 certification, fault tolerance, and integration with legacy Modbus Plus networks. In oil & gas facilities (offshore platforms, refineries, FPSOs), it connects the Tricon ESD/F&G SIS to legacy DCS and HMI systems for real-time safety status monitoring, alarm management, and event logging. For chemical and petrochemical plants, it integrates the Tricon reactor safety interlock system with legacy batch control systems, enabling coordinated safety actions and process data tracking. In power generation (thermal, nuclear, renewable), it links the Tricon turbine/generator protection system to legacy plant monitoring systems for performance monitoring and regulatory compliance. The module is also used in mining operations for hoist/conveyor safety system integration with legacy control networks and in water/wastewater treatment plants for chemical dosing safety system monitoring—all scenarios where legacy network integration and high availability are mandatory.

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.