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Triconex Tricon Communication Module 4117. Communication interface module for Tricon safety controllers providing network connectivity to plant control and information systems.

Triconex 4107 Triconex

€2.766,95

Only 4 units left

Triconex Tricon Enhanced Intelligent Communication Module (EICM) 4107. Ethernet communication module with enhanced throughput and protocol support for interfacing Tricon safety systems with DCS, SCADA, and IT networks. Supports Modbus TCP/IP and OPC.

Triconex 4101 Triconex

€1.747,95

Only 4 units left

Triconex Tricon Intelligent Communication Module (ICM) 4101, 5-cable Rev C. Early-generation Ethernet communication module providing network connectivity between Tricon safety system and plant-wide networks. 10Mbps Ethernet with 5 cable connections.

Triconex 3902AX Triconex

€1.271,95

Only 5 units left

Triconex Input/Output Module 3902AX. Specialized I/O module for Tricon safety controllers providing combined input/output capability for particular application requirements.

Triconex 3807 Triconex

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Triconex Tricon Analog Output Module (AO) 3807. TMR analog output module with specialized output configuration for particular process control requirements. Per-channel diagnostics and output readback. SIL 3 certified.

Triconex 3806E Triconex

€7.968,95

Only 3 units left

Triconex Tricon Enhanced Analog Output Module (EAO) 3806E. TMR analog output with enhanced specifications for demanding control applications. 4-20mA outputs with 16-bit D/A conversion and comprehensive diagnostics. SIL 3 certified.

Triconex 3805H Triconex

€6.249,95

Only 3 units left

Triconex Tricon Enhanced Analog Output Module (EAO) 3805H, 0-22mA, 8-point. TMR analog output providing 0-22mA current output range with 16-bit resolution and enhanced accuracy. Per-channel diagnostics and output readback verification. SIL 3 certified.

Triconex 3805E Triconex

€1.187,95

Only 9 units left

Triconex Tricon Enhanced Analog Output Module (EAO) 3805E, 4-20mA, 8-point. TMR analog output providing 4-20mA current output signals with 16-bit D/A conversion, ±0.1% accuracy, per-channel diagnostics, and output readback verification. HART pass-through capable. SIL 3 certified per IEC 61508.

Triconex 3800 Triconex

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Triconex Tricon Analog I/O Module 3800. TMR combined analog input/output module for compact I/O configurations. Supports both analog input measurement and analog output control on a single module. SIL 3 certified.

Triconex 3722X Triconex

€4.972,95

Only 3 units left

Triconex Tricon Differential Analog Input Module (DAI) 3722X, extended version. TMR differential analog input with expanded input range and enhanced specifications for specialized process measurement. SIL 3 certified.

Triconex 3723X Triconex

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Triconex Tricon Analog Input Module 3723X, extended version. TMR analog input with specialized input configuration for advanced process measurement applications. SIL 3 certified.

Triconex 3721N Triconex

€9.456,95

Only 5 units left

Triconex Tricon Differential Analog Input Module (DAI) 3721N, N-series version. Enhanced differential analog input with N-series backplane compatibility for Tricon V10.5+ systems. 32-point, 16-bit resolution, ±0.05% accuracy. SIL 3 certified.

Triconex 3721C Triconex

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Triconex Tricon Differential Analog Input Module (DAI) 3721C, conformal coated variant. Same specifications as 3721 with additional conformal coating for harsh environment protection. 32-point, 16-bit resolution, differential inputs. SIL 3 certified.

Triconex 3721 Triconex

€6.355,95

Only 5 units left

Triconex Tricon Differential Analog Input Module (DAI) 3721. TMR high-accuracy differential analog input for demanding process measurement applications. 16-bit A/D conversion, ±0.05% accuracy, differential inputs with superior common-mode noise rejection, per-channel diagnostics, and auto-calibration. 32-point capacity. SIL 3 certified per IEC 61508.

Triconex 3720 Triconex

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Triconex Tricon Analog Input Module (AI) 3720. TMR analog input with specialized input configuration for specific process measurement requirements. Per-channel diagnostics and automatic calibration. SIL 3 certified.

Triconex 3708E Triconex

€7.327,95

Only 9 units left

Triconex Tricon Enhanced Isolated Thermocouple Input Module 3708E. TMR thermocouple input with per-channel galvanic isolation, enhanced accuracy, cold junction compensation, and burnout detection. Supports J, K, T, E, R, S, B, N types. 16-point capacity with superior noise rejection. SIL 3 certified per IEC 61508.

Triconex 3706A Triconex

€2.618,95

Only 3 units left

Triconex Tricon Enhanced Thermocouple Analog Input Module (TC) 3706A. TMR thermocouple input with enhanced accuracy, improved cold junction compensation, and support for all standard thermocouple types (J, K, T, E, R, S, B, N). 16-point, per-channel open-circuit detection. SIL 3 certified.

Triconex 3706 Triconex

€3.861,95

Only 3 units left

Triconex Tricon Thermocouple Analog Input Module (TC). TMR thermocouple input with cold junction compensation, burnout detection, and support for multiple thermocouple types (J, K, T, E, R, S, B, N). 16-point capacity, per-channel diagnostics. SIL 3 certified.

Triconex 3704E Triconex

€4.837,95

Only 3 units left

Triconex Tricon Enhanced Analog Input Module (EAI) 3704E. TMR analog input with enhanced resolution and accuracy for demanding process measurement applications. Per-channel diagnostics, automatic calibration, and improved noise rejection. SIL 3 certified.

Triconex 3703E Triconex

€3.108,95

Only 7 units left

Triconex Tricon Enhanced Isolated Analog Input Module (IAI), 4-20mA, direct. TMR analog input with per-channel galvanic isolation for 4-20mA process signals, eliminating the need for external shunt resistors. 16-bit A/D conversion, enhanced accuracy (±0.1%), open-circuit and short-circuit detection. SIL 3 certified per IEC 61508.

Triconex 3701 Triconex

€1.695,95

Only 9 units left

Triconex Tricon Analog Input Module (AI) 3701, 0-10VDC, 32-point. TMR analog input module accepting 0-10VDC signals with 12-bit A/D conversion, differential inputs, and per-channel diagnostics. For higher-voltage process signal measurement applications. SIL 3 certified.

Triconex 3700A Triconex

€1.205,95

Only 8 units left

Triconex Tricon Analog Input Module (AI) 3700A, 0-5VDC, 32-point, differential with 6% overrange. Enhanced TMR analog input module with 12-bit resolution, improved accuracy, 6% overrange capability, and per-channel diagnostics. Supports 4-20mA signals through 250Ω shunt resistors. SIL 3 certified per IEC 61508.

Triconex 3700 Triconex

€7.468,95

Only 9 units left

Triconex Tricon Analog Input Module (AI), 0-5VDC, 32-point, differential, DC-coupled. TMR analog input with 12-bit A/D conversion, per-channel open/short detection, and differential inputs for noise rejection. Used for 4-20mA (with external resistor) and 0-5V process signals. SIL 3 certified.

Triconex 3674 Triconex

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Triconex Tricon Digital Output Module 3674, 24VDC. TMR digital output with specialized output configuration for specific safety application requirements. 24VDC sourcing with per-channel diagnostics. SIL 3 certified.

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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.