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Triconex Tricon Dual Digital Output Module 3664, 24VDC. TMR dual-channel supervised digital output with independent output paths for enhanced safety integrity. Each output channel has independent readback and load-line monitoring. SIL 3 certified.

Triconex 3636R Triconex

€1.152,95

Only 9 units left

Triconex Tricon Non-Triplicated Relay Output Module 3636R, 32-point. Relay output providing Form C (SPDT) dry contact outputs rated at 125VAC/155VDC for non-safety-critical supervisory and annunciation applications. Output readback verification available. Widely used for alarm and shutdown solenoid interfaces.

Triconex 3636T Triconex

€2.609,95

Only 5 units left

Triconex Tricon Non-Triplicated Relay Output Module 3636T, N.O. relay version. Normally-open relay output providing dry contact outputs for non-safety-critical applications with improved contact ratings and relay diagnostics.

Triconex 3636E Triconex

€1.312,95

Only 3 units left

Triconex Tricon Non-Triplicated Relay Output Module 3636E, enhanced. Relay output providing dry contact outputs (SPDT) for non-safety-critical applications with enhanced contact ratings and improved diagnostics.

Triconex 3636 Triconex

€2.769,95

Only 3 units left

Triconex Tricon Non-Triplicated Relay Output Module 3636. Relay output providing dry contact outputs for non-safety-critical applications within the Tricon system. Form C (SPDT) contacts for AC/DC load switching.

Triconex 3635R Triconex

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Triconex Tricon Relay Output Module 3635R. TMR relay output with dry contact outputs (SPDT) for interfacing with external AC/DC loads. Output readback verification and contact monitoring. SIL 3 certified.

Triconex 3625N Triconex

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Triconex Tricon Digital Output Module (DO) 3625N, 24VDC, N-series. Enhanced 24VDC digital output with N-series backplane compatibility for Tricon V10.5+ systems. 32-point, output readback verification. SIL 3 certified.

Triconex 3626X Triconex

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Triconex Tricon Digital Output Module (DO) 3626X, extended version. TMR digital output with specialized output configuration for specific load interface requirements. SIL 3 certified.

Triconex 3625C1 Triconex

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Triconex Tricon Enhanced Non-Grouped Digital Output Module (NGDO) 3625C1, 24VDC. Latest generation TMR digital output with individually protected channels, enhanced diagnostics, improved response time, and comprehensive output readback. SIL 3 certified per IEC 61508.

Triconex 3625C Triconex

€7.039,95

Only 3 units left

Triconex Tricon Non-Grouped Digital Output Module (NGDO) 3625C, 24VDC. TMR digital output with individually fused and monitored output channels for enhanced fault isolation. 24VDC sourcing outputs with per-channel diagnostics. SIL 3 certified.

Triconex 3625 Triconex

€1.617,95

Only 3 units left

Triconex Tricon Digital Output Module (DO), 24VDC, 32-point. TMR digital output providing 24VDC sourcing outputs with output readback verification and per-channel diagnostics. High point-count module for space-efficient I/O configurations. SIL 3 certified.

Triconex 3625A Triconex

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Triconex Tricon Digital Output Module (DO) 3625A, 24VDC, 32-point enhanced. TMR digital output with improved diagnostics and enhanced output specifications for 24VDC applications. Output readback verification and short-circuit protection. SIL 3 certified.

Triconex 3624 Triconex

€2.536,95

Only 6 units left

Triconex Tricon Supervised Digital Output Module (SDO), 24VDC. TMR supervised output with pulse-test diagnostics, continuous load-line monitoring, and output readback verification. 24VDC sourcing outputs. SIL 3 certified.

Triconex 3623 Triconex

€4.564,95

Only 3 units left

Triconex Tricon Supervised Digital Output Module, 120VDC. TMR supervised digital output for 120VDC loads with pulse-test diagnostics and continuous load-line integrity verification. SIL 3 certified.

Triconex 3623T Triconex

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Triconex Tricon Supervised Digital Output Module 3623T, 120VDC TMR. Triple modular redundant supervised output for 120VDC with pulse-test diagnostics and enhanced output monitoring. SIL 3 certified.

Triconex 3617E Triconex

€4.409,95

Only 6 units left

Triconex Tricon Enhanced Supervised Digital Output Module (ESDO) 3617E, 48VDC. TMR supervised output with enhanced diagnostics for 48VDC loads, pulse-test capability, and continuous load-line monitoring. SIL 3 certified.

Triconex 3614E Triconex

€797,95

Only 3 units left

Triconex Tricon Enhanced Supervised Digital Output Module 3614E. TMR supervised digital output with pulse-test diagnostics and continuous load-line monitoring for maximum output circuit integrity verification. SIL 3 certified.

Triconex 3614 Triconex

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Triconex Tricon Supervised Digital Output Module 3614. TMR digital output with enhanced supervision and monitoring capability for critical output applications. SIL 3 certified.

Triconex 3611E Triconex

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Triconex Tricon Enhanced Digital Output Module (EDO) 3611E. TMR supervised digital output with specialized output specifications for particular load types. SIL 3 certified.

Triconex 3607E Triconex

€1.762,95

Only 6 units left

Triconex Tricon Enhanced Digital Output Module (EDO) 3607E, 48VDC. TMR supervised digital output for 48VDC loads with output readback verification and load-line monitoring. SIL 3 certified.

Triconex 3604E Triconex

€3.104,95

Only 9 units left

Triconex Tricon Enhanced Digital Output Module (EDO), 24VDC, 16-point. TMR supervised digital output with enhanced diagnostics, improved response time, and 24VDC sourcing outputs with output readback verification and short-circuit protection. SIL 3 certified per IEC 61508.

Triconex 3603T Triconex

€4.115,95

Only 3 units left

Triconex Tricon Digital Output Module (DO) 3603T, 120VDC TMR supervised. Triple modular redundant supervised digital output for 120VDC loads with comprehensive output readback verification. SIL 3 certified.

Triconex 3604A Triconex

€5.200,95

Only 4 units left

Triconex Tricon Digital Output Module (DO) 3604A, 24VDC, 16-point. TMR supervised digital output with 24VDC sourcing outputs, output readback, and load-line monitoring. SIL 3 certified.

Triconex 3603E Triconex

€50.218,95

Only 3 units left

Triconex Tricon Enhanced Digital Output Module (EDO) 3603E, 110/120VDC. TMR supervised digital output with enhanced diagnostics and improved load-line monitoring for DC output applications. 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.