TRICONEX Tricon 4119 Modules

Technical Dossier

Product Details And Specifications

TRICONEX Tricon Series: Comprehensive Module Range and Technical Overview

The TRICONEX Tricon platform is a Triple Modular Redundant (TMR) Safety Instrumented System (SIS) deployed across the most demanding process industries globally — including petrochemical refineries, LNG terminals, nuclear power stations, offshore platforms, and chemical manufacturing facilities. Certified to IEC 61511 and IEC 61508 SIL 3, the Tricon architecture operates on a fault-tolerant, triple-redundant backplane that allows online repair without process shutdown. The 4119 Enhanced Intelligent Module is a core component within this ecosystem, providing high-density I/O processing with integrated diagnostics. Installed base spans hundreds of facilities across North America, Europe, the Middle East, and Asia-Pacific, making long-term spare parts availability a critical operational requirement for plant integrity teams.

The Evolution of Tricon Architecture

The Tricon system was introduced by Triconex Corporation in the 1980s as one of the first commercially available TMR safety controllers. The original Tricon v1 and v2 chassis used parallel backplane communication with discrete I/O modules rated for SIL 2 applications. By the mid-1990s, Tricon v9 and v10 introduced enhanced intelligent modules (EIM) — including the 4119 series — featuring onboard microprocessors for local diagnostics, expanded channel counts, and improved HART pass-through capability. The v10 and v11 generations introduced the Tricon Communication Module (TCM) and peer-to-peer Triconex TriStation 1131 programming environment. Following Schneider Electric's acquisition of Invensys (parent of Triconex) in 2014, the platform was integrated into the EcoStruxure Safety architecture. The Tricon CX (model 4351A/B) represents the current-generation controller, maintaining backward I/O compatibility with legacy 4xxx-series modules. Many 4119 installations remain active in brownfield facilities where full system replacement is cost-prohibitive, driving sustained demand for certified spare parts and lifecycle extension services.

Tricon Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the TRICONEX Tricon 4xxx and related series. Each module is classified by functional category:

Controllers & Main Processors

4119: Enhanced Intelligent Module (EIM); TMR processor with onboard diagnostics and HART support.
4351A: Tricon CX Main Processor; current-generation TMR controller with dual Ethernet ports.
4351B: Tricon CX Main Processor (redundant pair); hot-standby TMR CPU module.
4100: Tricon Main Processor Module v9/v10; legacy TMR CPU for older chassis generations.
4101: Tricon Main Processor Module; enhanced version with expanded memory for v10 systems.

Digital Input (DI) Modules

3501E: 32-channel 24VDC Digital Input Module; TMR voting logic, field-side diagnostics.
3503E: 32-channel 120VAC Digital Input Module; high-voltage field wiring, SIL 3 rated.
3664: 16-channel Digital Input Module; legacy v9 compatible, discrete 24VDC sensing.
3805E: 32-channel 24VDC Digital Input Module; enhanced diagnostics, CE marked.

Digital Output (DO) Modules

3601E: 16-channel 24VDC Digital Output Module; solid-state relay outputs, TMR architecture.
3603E: 16-channel 120VAC Digital Output Module; triac outputs for AC load switching.
3625: 16-channel Digital Output Module; legacy v9/v10 chassis compatible.

Analog Input (AI) Modules

3703E: 8-channel 4–20mA Analog Input Module; 16-bit resolution, HART pass-through.
3706A: 8-channel Analog Input Module; thermocouple/RTD inputs, cold junction compensation.
3721: 8-channel Analog Input Module; legacy v9 compatible, 4–20mA with diagnostics.

Analog Output (AO) Modules

3805E: 8-channel 4–20mA Analog Output Module; TMR voted output with loop diagnostics.
3700A: 8-channel Analog Output Module; legacy chassis, 12-bit DAC resolution.

Communication & Network Modules

4329A: Tricon Communication Module (TCM); Ethernet/IP and Modbus TCP gateway for DCS integration.
4329B: TCM Enhanced; dual-port Ethernet, OPC-DA server, redundant network support.
4210: Hiway Interface Module; legacy DH+ and Data Hiway communication adapter.

Power Supply Modules

8312: Tricon Power Supply Module; 24VDC input, redundant hot-swap capable.
8110: Tricon AC Power Supply; 120/240VAC input, internal DC regulation for chassis bus.

Sourcing Hard-to-Find & Obsolete Tricon Parts

The TRICONEX Tricon 4xxx series entered the mature/end-of-active-production phase following the transition to Tricon CX. Schneider Electric has formally discontinued several 4xxx-series modules, including the 4119, 4100, and 4101 processors, with no direct OEM replacement stocked through standard distribution channels. DriveKNMS maintains a dedicated inventory of tested, certified surplus Tricon modules sourced from decommissioned plant assets, controlled storage facilities, and authorized secondary market channels. All units are inspected against original Triconex hardware revision specifications. For facilities operating under long-term maintenance contracts or regulated environments (nuclear, offshore), DriveKNMS provides documentation packages including test reports, revision history, and traceability records upon request. Minimum lead times for in-stock 4119 units: 1–3 business days. Custom procurement for low-volume or rare variants: 5–15 business days depending on global sourcing requirements.

Quality Control for the Tricon Range

TRICONEX Tricon modules incorporate a complex TMR backplane bus architecture that requires specialized test procedures beyond standard PLC module bench testing. DriveKNMS applies the following protocol to all Tricon inventory:

Backplane Bus Integrity Test: Each module is seated in a live Tricon chassis and subjected to full TMR voting cycle verification across all three legs (Leg A, B, C). Voting discrepancies are flagged and the module is rejected.
Channel-Level Functional Test: All I/O channels are exercised at rated voltage/current. For analog modules, linearity and offset error are measured against factory calibration tolerances (±0.1% FS).
HART Communication Verification: For modules with HART pass-through (including 4119 and 3703E), HART command set 0–3 is executed and response integrity is confirmed.
Firmware Revision Check: Module firmware is read and logged. Units with unsupported or mismatched firmware revisions are quarantined pending customer confirmation.
Thermal Burn-In: High-value processor modules (4119, 4351A/B) undergo 48-hour powered burn-in at 40°C ambient to screen for early-life failures.
Final Inspection & Labeling: Each unit receives a DriveKNMS QC label with test date, technician ID, and pass/fail summary before packaging.