ICS Triplex T3000 Series Digital Input Module T3419

Technical Dossier

Product Details And Specifications

ICS Triplex T3000 Series: Comprehensive Module Range and Technical Overview

The ICS Triplex T3000 Trusted Series is a fault-tolerant distributed control system (DCS) platform engineered for safety-critical continuous process industries. Deployed across petrochemical complexes, nuclear power stations, offshore oil & gas platforms, and refinery control rooms globally, the T3000 architecture operates on a Triple Modular Redundancy (TMR) principle — three independent processing channels vote on every I/O signal, eliminating single-point failures. The T3419 is a 24 VDC Digital Input module within this architecture, designed to interface field-level discrete signals with the Trusted controller backplane under SIL 2/3 certified conditions. Installations of T3000 hardware remain active in facilities with operational lifespans exceeding 25 years, making long-term spare parts availability a critical procurement concern for plant integrity teams.

The Evolution of T3000 Series Architecture

ICS Triplex introduced the Trusted T3000 platform in the early 1990s as a successor to its earlier TMR-based systems. The architecture was built around a proprietary backplane bus that supports hot-swap module replacement without process interruption. Early revisions of the T3000 used parallel backplane communication; later hardware revisions introduced serial diagnostic buses for improved fault isolation. Honeywell acquired ICS Triplex in 2004, and subsequent hardware generations — including the T3000 HS (High Speed) variants — maintained backward compatibility with original T3000 chassis and power supplies, though firmware dependencies between controller and I/O modules require careful version matching during replacement. The platform entered its mature/end-of-active-production phase, with Honeywell transitioning customers toward the Safety Manager SC platform. However, the installed base of T3000 systems remains substantial, and OEM-equivalent replacement modules continue to be sourced through specialist distributors to support lifecycle extension programs (LCE) for facilities not yet ready for full migration.

T3000 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the ICS Triplex T3000 Trusted Series. Each module is designed for TMR operation and is backplane-compatible within the T3000 chassis family.

Digital Input Modules

• T3419: 24 VDC Digital Input module, 16-channel, TMR-rated, SIL 2/3 field interface
• T3420: 120 VAC Digital Input module, 16-channel, high-voltage discrete signal acquisition
• T3421: 24 VDC Digital Input module, 32-channel, high-density field termination variant
• T3422: 48 VDC Digital Input module, 16-channel, telecom-grade voltage compatibility

Digital Output Modules

• T3431: 24 VDC Digital Output module, 16-channel, solid-state relay-driven discrete outputs
• T3432: 120 VAC Digital Output module, 8-channel, high-voltage actuator interface
• T3433: 24 VDC Digital Output module, 32-channel, high-density actuator control

Analog Input Modules

• T3401: 4–20 mA Analog Input module, 8-channel, HART-compatible process variable acquisition
• T3402: Thermocouple/RTD Analog Input module, 8-channel, temperature measurement interface
• T3403: Voltage Analog Input module, ±10 VDC range, 8-channel precision measurement
• T3404: 4–20 mA Analog Input module, 16-channel, high-density process signal acquisition

Analog Output Modules

• T3411: 4–20 mA Analog Output module, 8-channel, control valve and positioner interface
• T3412: Voltage Analog Output module, ±10 VDC, 8-channel precision control signal

Controller & Communication Modules

• T3110: Trusted TMR Main Processor module, primary CPU for T3000 controller chassis
• T3120: Trusted Communication Interface module, Modbus/TCP and proprietary bus gateway
• T3130: Trusted I/O Bus Extender module, chassis-to-chassis backplane extension interface

Power Supply Modules

• T3200: Trusted 24 VDC Power Supply module, redundant power feed for T3000 chassis
• T3210: Trusted 120/240 VAC Power Supply module, universal input voltage, chassis power

Sourcing Hard-to-Find & Obsolete T3000 Series Parts

DriveKNMS maintains a dedicated inventory program for ICS Triplex T3000 Trusted Series modules, including discontinued and long-lead-time variants. As the T3000 platform has entered its end-of-active-production lifecycle, OEM factory orders are no longer a reliable procurement channel for most module types. DriveKNMS sources T3419 and related T3000 modules through a verified network of decommissioned plant asset liquidations, authorized surplus distributors, and controlled refurbishment channels. All units are cross-referenced against ICS Triplex part number databases and Honeywell legacy catalogs to confirm authenticity. For facilities operating under lifecycle extension agreements or planning a phased migration to Safety Manager SC, DriveKNMS provides multi-year buffer stock planning and consignment inventory options. Emergency same-day quotation is available for critical plant shutdown scenarios.

Quality Control for the T3000 Series Range

T3000 Trusted Series modules present specific test challenges due to their TMR backplane architecture and proprietary inter-channel voting logic. DriveKNMS applies a structured inspection and functional verification protocol to all T3000 inventory:

• Visual inspection of backplane edge connectors and conformal coating integrity
• Power-on self-test (POST) verification using T3000-compatible chassis test rigs
• Channel-by-channel I/O signal injection and response verification for all DI/DO/AI/AO module types
• TMR voting logic validation — all three processing lanes tested independently and in combined mode
• Firmware revision identification and documentation against known-compatible controller versions
• Burn-in cycle: 48-hour continuous operation under rated load conditions prior to shipment
• Final inspection report issued with each unit, including test date, firmware version, and pass/fail log