ICS Triplex Trusted Series Modules: ICS Triplex TPG-1RM

Technical Dossier

Product Details And Specifications

ICS Triplex Trusted Series: Comprehensive Module Range and Technical Overview

The ICS Triplex Trusted platform is a fault-tolerant, triple modular redundancy (TMR) safety system deployed across the most demanding process industries globally. Installed in petrochemical complexes, offshore oil and gas platforms, nuclear power stations, LNG terminals, and continuous-process refineries, the Trusted architecture provides SIL 3-rated protection for critical control loops. Its modular backplane design allows hot-swap replacement of I/O, communication, and controller modules without process interruption — a requirement in facilities where unplanned downtime carries multi-million-dollar consequences. The TPG-1RM gauge module is one of many field-replaceable units within this ecosystem, designed for direct integration into the Trusted chassis.

The Evolution of Trusted Series Architecture

ICS Triplex introduced the Trusted platform in the early 1990s as a successor to its earlier Atlas TMR system. The original Trusted architecture used a proprietary backplane bus operating at low data rates, with discrete I/O modules communicating via isolated tri-redundant signal paths. By the mid-1990s, the platform was expanded to include analog input modules with HART pass-through capability, enabling field device diagnostics without additional wiring infrastructure.

In the 2000s, ICS Triplex — subsequently acquired by Rockwell Automation — introduced the T8000 series chassis and updated communication adapters supporting Ethernet/IP and Modbus TCP, extending the Trusted platform's integration capability with modern DCS and SCADA layers. The T8100 controller module replaced earlier processor cards, offering increased scan rates and expanded memory for complex cause-and-effect logic. Legacy modules from the T3000 and T3400 sub-families remain in service at sites with long capital replacement cycles, and cross-compatibility between generations requires careful firmware and chassis revision matching. Sites operating mixed-generation Trusted systems must maintain accurate module revision records to avoid backplane communication faults during replacement.

Trusted Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the core module range of the ICS Triplex Trusted platform. Each module is a discrete field-replaceable unit (FRU) designed for installation in the Trusted TMR chassis.

Controllers & Processors

• T8100: TMR main controller module, primary CPU for Trusted chassis logic execution
• T8110: Enhanced controller module with expanded I/O scan capacity and dual Ethernet ports
• T8151B: Processor module, revision B, with updated firmware support for SIL 3 logic

Analog Input Modules

• T8403: 8-channel analog input module, 4–20 mA, HART-enabled, TMR signal voting
• T8431: 16-channel analog input, high-density configuration for large I/O count applications
• T3401: Legacy 8-channel analog input module, compatible with T3000-series chassis
• T3411: Analog input module with isolated channels, early-generation Trusted platform
• T3411A: Revision A update of T3411, improved common-mode rejection ratio

Digital Input Modules

• T8461: 24-channel digital input module, 24 VDC, TMR voting logic, SIL 3 rated
• T8311: 16-channel digital input, configurable for dry contact or powered input signals
• T8311C: Revision C of T8311, updated optical isolation for improved noise immunity

Digital Output Modules

• T8480: 8-channel digital output module, relay-type, for final element actuation
• T3480: Legacy 8-channel digital output, relay contacts, T3000-series compatible

Communication & Network Adapters

• T8800: Ethernet/IP communication module for DCS integration and remote I/O expansion
• T8850: Modbus TCP gateway module, supports legacy SCADA protocol bridging

Power Supply Modules

• T8100-PS: Redundant power supply module for T8000-series chassis, 24 VDC input

Gauge & Specialty Modules

• TPG-1RM: Gauge module for direct process variable monitoring within the Trusted chassis

Sourcing Hard-to-Find & Obsolete Trusted Series Parts

The ICS Triplex Trusted platform has entered a mature-to-declining lifecycle phase. Rockwell Automation has progressively reduced active manufacturing support for legacy T3000 and T3400 sub-family modules, and several T8000-series modules are now available only through authorized aftermarket channels. For facilities operating Trusted systems under long-term service agreements or deferred capital replacement programs, sourcing replacement modules through secondary market specialists is the primary strategy for maintaining system availability.

DriveKNMS maintains a dedicated inventory of ICS Triplex Trusted modules, including obsolete and last-time-buy units. Our sourcing network covers original-manufacture surplus, tested-used, and refurbished stock. For end-of-life modules such as T3401, T3411, and T3480, we provide traceability documentation and functional test reports to support site maintenance records. Customers operating under IEC 61511 functional safety management systems can request module-level test data to satisfy their management of change (MOC) procedures.

Quality Control for the Trusted Series Range

ICS Triplex Trusted modules use a proprietary backplane bus with tri-redundant signal paths. Standard bench testing procedures are insufficient to verify TMR voting logic integrity. DriveKNMS applies a dedicated test protocol for Trusted modules that includes:

• Backplane bus continuity verification using Trusted-compatible chassis fixtures
• Channel-by-channel signal injection for analog input modules (T8403, T8431, T3401) to verify 4–20 mA linearity and HART communication pass-through
• Digital I/O functional test under simulated field load conditions for T8461, T8311, T8480, and T3480 modules
• Communication module loopback testing for T8800 and T8850 to confirm Ethernet/IP and Modbus TCP frame integrity
• Controller module (T8100, T8110, T8151B) firmware version verification and memory self-test execution
• Visual inspection of backplane connectors, conformal coating condition, and capacitor health on power supply modules

All tested modules are issued a DriveKNMS inspection report with pass/fail criteria documented per module type.