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Triconex Tricon Network Communication Module 4400. Ethernet network communication module providing high-speed connectivity between Tricon safety system and plant networks. Supports modern communication protocols.

Triconex 4355X Triconex

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Triconex Tricon Communication Module (TCM) 4355X, extended variant. Communication module with enhanced features for complex network integration scenarios.

Triconex 4352B Triconex

88,165.00 kr

Only 5 units left

Triconex Tricon Communication Module (TCM) 4352B, enhanced. Latest firmware revision communication module with dual Ethernet, serial ports, Modbus TCP/IP, OPC, and enhanced cybersecurity hardening.

Triconex 4354 Triconex

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Triconex Tricon Communication Module (TCM) 4354. Communication module with specialized connectivity options for Tricon safety system integration.

Triconex 4353 Triconex

62,812.00 kr

Only 3 units left

Triconex Tricon Communication Module (TCM) 4353, 2x Ethernet, 4x Serial. Communication module variant with specific port configuration for particular system integration requirements.

Triconex 4352AN Triconex

59,979.00 kr

Only 5 units left

Triconex Tricon Communication Module (TCM) 4352AN, N-series. N-series compatible communication module with Ethernet and serial ports for Tricon V10.5+ systems. Enhanced cybersecurity and protocol support.

Triconex 4352A Triconex

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Triconex Tricon Communication Module (TCM) 4352A. Communication module with enhanced specifications providing Ethernet and serial connectivity for Tricon safety system integration.

Triconex 4351A Triconex

21,817.00 kr

Only 6 units left

Triconex Tricon Communication Module (TCM) 4351A, 2x Ethernet, 4x Serial. Enhanced communication module with dual 10/100 Ethernet ports and four serial ports for flexible connectivity to DCS, SCADA, HMI, and field devices. Supports Modbus TCP/IP, OPC, and serial Modbus RTU/ASCII.

Triconex 4351B Triconex

114,897.00 kr

Only 8 units left

Triconex Tricon Communication Module (TCM) 4351B, copper Ethernet. Latest generation TCM with dual 10/100 copper Ethernet ports, up to 4 serial ports, Modbus TCP/IP, OPC DA/AE, TSAA protocol, enhanced cybersecurity, and SOE time-stamping. Firmware-upgradeable for evolving protocol requirements. SIL 3 rated.

Triconex 4351 Triconex

13,927.00 kr

Only 4 units left

Triconex Tricon Communication Module (TCM) 4351. Tricon Communication Module providing dual Ethernet ports and serial communication for DCS/SCADA integration. Supports Modbus TCP/IP, OPC, and serial Modbus RTU.

Triconex 4329G Triconex

55,894.00 kr

Only 3 units left

Triconex Tricon Network Communication Module (NCM) 4329G, Gigabit Ethernet variant. Enhanced NCM with Gigabit Ethernet capability for high-bandwidth plant network integration and faster data throughput.

Triconex 4329 Triconex

14,471.00 kr

Only 8 units left

Triconex Tricon Network Communication Module (NCM) 4329, 10Mbps Ethernet. High-performance network communication module with Modbus TCP/IP, OPC support, and enhanced cybersecurity for integrating Tricon safety systems with plant-wide Ethernet networks.

Triconex 4328 Triconex

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Triconex Tricon Network Communication Module (NCM) 4328. Enhanced Ethernet communication module with improved throughput and protocol support for Tricon safety system network integration.

Triconex 4327 Triconex

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Triconex Tricon Network Communication Module (NCM) 4327. Ethernet-based network communication module for Tricon safety systems providing connectivity to plant networks with Modbus TCP/IP protocol support.

Triconex 4317 Triconex

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Triconex Tricon Diagnostic Communication Module (DCM) 4317. Provides enhanced diagnostic data communication between the Tricon safety system and maintenance/engineering workstations for system monitoring and troubleshooting.

Triconex 4211 Triconex

17,053.00 kr

Only 5 units left

Triconex Tricon Serial Remote Extender Module (SRXM) 4211, secondary. Serial remote extender receiver installed in remote I/O chassis, paired with SRXM 4210 primary for copper-based remote I/O communication.

Triconex 4210 Triconex

77,776.00 kr

Only 7 units left

Triconex Tricon Serial Remote Extender Module (SRXM) 4210. Serial communication-based remote extender for connecting remote I/O chassis to the main Tricon processor over copper wiring. Shorter distance alternative to fiber optic extenders.

Triconex 4201N Triconex

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Triconex Tricon Remote Extender Module (RXM) 4201N, N-series fiber optic secondary. Enhanced fiber optic receiver with N-series compatibility for remote I/O chassis in Tricon V10.5+ systems.

Triconex 4201 Triconex

17,260.00 kr

Only 6 units left

Triconex Tricon Remote Extender Module (RXM) 4201, fiber optic secondary. Fiber optic receiver module installed in remote I/O chassis to receive data from the primary RXM 4200. Supports redundant fiber paths for fault-tolerant remote I/O communication.

Triconex 4200N Triconex

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Triconex Tricon Remote Extender Module (RXM) 4200N, N-series fiber optic primary. Enhanced fiber optic remote extender with N-series compatibility for Tricon V10.5+ remote I/O configurations.

Triconex 4200 Triconex

24,854.00 kr

Only 9 units left

Triconex Tricon Remote Extender Module (RXM) 4200, fiber optic primary. Fiber optic communication module enabling remote I/O chassis up to 3 km from the main Tricon processor. Provides redundant fiber optic links for reliable long-distance communication.

Triconex 4119A Triconex

24,714.00 kr

Only 9 units left

Triconex Tricon Enhanced Intelligent Communication Module (EICM) 4119A. Latest generation communication module with dual 10/100 Ethernet ports, Modbus TCP/IP, OPC DA/AE, SOE time-stamping, and enhanced cybersecurity hardening. Supports up to 16 simultaneous client connections. SIL 3 certified per IEC 61508.

Triconex 4118 Triconex

19,979.00 kr

Only 3 units left

Triconex Tricon Enhanced Intelligent Communication Module (EICM) 4118. Ethernet communication module with isolating capability for secure communication between the Tricon safety system and external networks. Supports Modbus TCP/IP.

Triconex 4119 Triconex

18,390.00 kr

Only 3 units left

Triconex Tricon Enhanced Intelligent Communication Module (EICM) 4119. High-performance Ethernet communication module with Modbus TCP/IP, OPC support, and enhanced cybersecurity features for Tricon V10 safety systems.

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Triconex is a Schneider Electric brand specializing in safety instrumented systems and critical control technology for process industries and high-hazard industrial applications. Triconex hardware is built around the Triple Modular Redundancy (TMR) architecture, in which three independent processing channels run in parallel and vote on outputs, maintaining continuous safe-state operation even when individual components fail. Triconex systems are certified to IEC 61508 and IEC 61511 standards and are deployed globally in facilities where a failure in the safety function carries unacceptable operational, safety, and regulatory risk. PLC Direct supplies Triconex hardware for customers sourcing replacement components for installed Tricon safety systems. Our Triconex collection supports maintenance teams and procurement managers in keeping existing Triconex-based safety installations operational.

Why Choose Triconex Safety Systems

Triconex is recognized as a purpose-built safety instrumented system platform with a long-established presence in process industries where SIL 2 and SIL 3 functional safety requirements apply. The Tricon platform's fully triplicated architecture, from input modules through main processors to output modules, is designed to provide fault-tolerant, uninterrupted operation in environments where any lapse in safety function availability is not acceptable.

Triconex safety systems are commonly installed in:

Oil and gas production, refining, and petrochemical processing facilities
LNG terminals, gas transmission pipelines, and compressor stations
Chemical and specialty chemical manufacturing plants
Power generation facilities, including thermal and nuclear applications
Offshore platforms and subsea production installations
Facilities subject to OSHA Process Safety Management (PSM) regulations
Industrial plants requiring emergency shutdown (ESD) and fire and gas detection systems

This concentration in safety-critical process industries reflects Triconex’s design focus on high-integrity, high-availability control, where the cost of a missed safe-state response is measured in environmental, safety, and regulatory terms.

Triconex Products and Solutions

Triconex hardware at PLC Direct covers components used within the Tricon safety system platform, including communication modules, I/O termination panels, terminal boards, interface modules, analog input assemblies, and field communication accessories. The Triconex collection focuses on hardware that supports the maintenance and lifecycle continuity of installed Tricon systems.

Triconex Product Families

Tricon Communication Modules (TCM): The 4351B is a Tricon Communication Module used in Tricon v10.0 and later systems. Each TCM contains four RS-232/RS-485 serial ports and two 10/100BaseT copper Ethernet network ports, supporting TriStation, Modbus master and slave, TCP/IP, TSAA, and SNTP protocols. A single Tricon system supports up to four TCMs. The 4351B enables communication between the Tricon controller, TriStation engineering workstations, other Tricon or Trident controllers, and Modbus devices over Ethernet networks.
Tricon Terminal Boards: Terminal board assemblies for field wiring termination in the Tricon system. These boards provide organized connection points for analog and digital I/O field wiring within the Tricon cabinet. The collection covers the 9761, 9762, 9765, and 9771 series, including the 9761-210, 9762-210, 9765-210, 9771, 9771-210, and 9771-2XX configurations.
Tricon Interface and Terminal Modules: Interface and terminal modules for Tricon safety system wiring, covering the 9802, 9832, and 9852 series. These modules provide the physical connection interface between Tricon I/O and field instrumentation wiring.
Tricon DIDO Termination Panels: Combined digital I/O termination panels for organized field wiring within the Tricon safety system. The 9853 series is available in two terminal block configurations: Phoenix Contact (9853) and Weidmuller (9853-610), reflecting the two variants used across different Tricon installation specifications.
Tricon Analog Input Module Assemblies: Integrated housing and control unit assemblies for analog measurement applications. The HCU3700/3703E combines the 3700-series analog input module with the 3703E isolated analog input, providing integrated thermocouple and process measurement capability in a pre-configured assembly.
MTL4850 HART Multiplexer: The MTL4850 is a HART protocol multiplexer used with Tricon safety system I/O modules to enable communication with HART-enabled field instruments. It provides maintenance teams access to device diagnostics, configuration data, and calibration information from connected field devices.

Triconex Products Available on PLC Direct

4351B Tricon Communication Module (TCM) with four RS-232/RS-485 serial ports and two 10/100BaseT copper Ethernet network ports, compatible with Tricon v10.0 and later systems
Tricon terminal boards across the 9761, 9762, 9765, and 9771 series for analog and digital field wiring termination
Tricon interface and terminal modules in the 9802, 9832, and 9852 series
Tricon DIDO termination panels (9853 series) in Phoenix Contact and Weidmuller terminal configurations
HCU3700/3703E integrated analog input module assemblies for thermocouple and process measurement
MTL4850 HART multiplexer for field device communication with Tricon I/O modules

These products are typically sourced for component replacement, wiring infrastructure maintenance, and lifecycle support of existing Tricon safety system installations.

Lifecycle Support for Triconex Industrial Systems

PLC Direct supports Triconex safety system installations by supplying hardware components used across active and aging Tricon systems. Our focus is on helping maintenance engineers and procurement teams source the specific Triconex hardware needed to keep installed safety systems operational without waiting on OEM lead times.

Our support coverage includes:

Hardware for active, in-service Tricon safety system installations
Components used in older Tricon system versions still in operation at process facilities
Select discontinued Triconex parts, subject to availability.

Additional support may include:

Inventory-backed availability for urgent sourcing requirements
Assistance with part number identification and order verification
Sourcing support for hard-to-find Triconex termination and interface hardware
1-year PLC Direct warranty on all purchased items

PLC Direct supplies Triconex hardware for replacement and maintenance purposes and does not provide safety system design, programming, validation, or integration services.

Frequently Asked Questions

Triple Modular Redundancy means the Tricon system runs three independent processing channels simultaneously. All three channels read inputs, execute the control program, and vote on outputs, so the system continues to function correctly even if one channel develops a fault. For procurement teams, TMR architecture means that every I/O module, terminal board, and communication component in a Tricon system must match the installed configuration precisely. Part compatibility is not just a performance question — it is a safety architecture requirement.

We carry Triconex components for installed Tricon safety systems, including terminal boards (9761, 9762, 9765, and 9771 series), interface and terminal modules (9802, 9832, and 9852), DIDO termination panels (9853 series in Phoenix Contact and Weidmuller configurations), HCU3700/3703E analog input assemblies, and the MTL4850 HART multiplexer. Contact us with your part number to check current availability.

Triconex systems are most commonly found in oil and gas production and refining, petrochemical and chemical processing, LNG terminals, power generation, and offshore platforms. These are industries where process safety management regulations require safety instrumented systems certified to IEC 61508 or IEC 61511, and where an undetected failure in a safety function carries serious operational and regulatory consequences.

No. The 9853 (Phoenix Contact) and 9853-610 (Weidmuller) DIDO termination panels are distinct versions designed for specific terminal block types used in different Tricon installations. The terminal block manufacturer affects the compatibility of field wiring terminations. Always verify which configuration is installed before ordering a replacement panel.

As an independent supplier, we stock Triconex hardware outside standard OEM distribution channels. This makes PLC Direct a practical sourcing option for maintenance teams that need a specific Tricon terminal board, interface module, or DIDO panel quickly. Contact us with your part number to check availability and condition grade options.