ICS Triplex T9800 Series Modules

Technical Dossier

Product Details And Specifications

ICS Triplex T9800 Series: Comprehensive Module Range and Technical Overview

The ICS Triplex T9800 Series represents a cornerstone of fault-tolerant safety instrumented systems (SIS) deployed across global heavy industry. Engineered to IEC 61508 SIL 2/3 standards, T9800 Series modules are embedded in critical infrastructure including petrochemical refineries, offshore oil and gas platforms, nuclear power generation facilities, and large-scale chemical processing plants. The series operates within the ICS Triplex Trusted TMR (Triple Modular Redundancy) architecture, where three independent processing channels vote continuously to detect and isolate faults without process interruption. Installed base spans facilities operated by major energy companies across North America, Europe, the Middle East, and Asia-Pacific. Due to the safety-critical nature of these applications, replacement modules must meet exact hardware revision and firmware compatibility requirements — making verified spare parts sourcing a mission-critical procurement function.

The Evolution of T9800 Series Architecture

The ICS Triplex T9800 Series was developed as part of the second-generation Trusted platform, succeeding the earlier T8000 Series which established the TMR voting architecture in the 1990s. The T9800 generation introduced enhanced backplane communication speeds, improved diagnostic coverage, and expanded I/O density per slot compared to its predecessor. Key architectural characteristics include a dedicated TMR backplane bus that isolates each channel's signal path, hardware-enforced voting logic at the module level, and hot-swap capability that allows module replacement under live process conditions without SIS trip. Compatibility between T9800 modules is governed by the Trusted system chassis revision — T9800 modules are not interchangeable with T8000 Series hardware without chassis and firmware validation. As the T9800 Series has entered its mature-to-end-of-life phase, ICS Triplex (now part of Honeywell Process Solutions) has transitioned new project specifications toward the Trusted TMR T9100 and Safety Manager SC platforms. However, the installed base of T9800 systems remains extensive, and long-term maintenance support for existing installations continues to be a primary procurement requirement through 2030 and beyond.

T9800 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified models within the ICS Triplex T9800 Series. Each module is classified by functional category.

Output Modules

• T9802: TMR Digital Output Module, 16-channel, 24VDC solid-state, SIL 2/3 rated
• T9803: TMR Analog Output Module, 8-channel, 4–20mA, loop-powered with diagnostics
• T9804: TMR Digital Output Module, 32-channel, high-density discrete output, 24VDC
• T9805: TMR Relay Output Module, 8-channel, dry contact, rated for 250VAC/30VDC switching

Input Modules

• T9810: TMR Digital Input Module, 32-channel, 24VDC, with per-channel diagnostics
• T9811: TMR Analog Input Module, 8-channel, 4–20mA/1–5VDC configurable, HART-capable
• T9812: TMR Analog Input Module, 16-channel, 4–20mA, high-speed scan rate
• T9813: TMR Thermocouple Input Module, 8-channel, J/K/T/E/R/S/B type, cold junction compensated
• T9814: TMR RTD Input Module, 8-channel, PT100/PT1000, 2/3/4-wire configurable
• T9815: TMR Digital Input Module, 16-channel, 120VAC, isolated, for high-voltage field devices

Controller & Processor Modules

• T9820: TMR Main Processor Module, Trusted platform CPU, IEC 61131-3 execution engine
• T9821: TMR Co-Processor Module, extended logic capacity for large application programs
• T9822: TMR System Controller, manages backplane arbitration and inter-chassis communication

Communication & Network Modules

• T9830: TMR Modbus TCP/RTU Communication Module, dual-port Ethernet, gateway function
• T9831: TMR PROFIBUS DP Communication Adapter, master/slave configurable, up to 12Mbps
• T9832: TMR OPC-DA/UA Server Module, real-time data publication to SCADA/DCS historian

Power Supply Modules

• T9840: TMR Power Supply Module, 24VDC input, redundant internal rails, hot-swap rated
• T9841: TMR Power Supply Module, 120/240VAC input, auto-ranging, with power fault diagnostics

Sourcing Hard-to-Find & Obsolete T9800 Series Parts

As ICS Triplex has formally discontinued active manufacturing of the T9800 Series, procurement of replacement modules increasingly depends on specialist distributors with verified surplus inventory. DriveKNMS maintains a dedicated stock pool of T9800 Series modules sourced from decommissioned systems, controlled factory surplus, and authorized channel partners. All units are catalogued by hardware revision and firmware version to ensure compatibility with the target chassis configuration. For end-users operating T9800-based SIS installations beyond the OEM's active support window, DriveKNMS provides: exact hardware revision matching, multi-unit lot sourcing for planned maintenance shutdowns, emergency same-day dispatch for unplanned outages, and documentation packages including test records and traceability certificates. Customers are advised to provide the full module part number including hardware suffix (e.g., T9802/A2) when submitting procurement requests to ensure revision-level accuracy.

Quality Control for the T9800 Series Range

T9800 Series modules incorporate TMR backplane bus interfaces and internal voting logic that require functional validation beyond standard power-on testing. DriveKNMS applies a structured test protocol to all T9800 units prior to dispatch. Each module undergoes: visual inspection for backplane connector wear, capacitor condition, and PCB integrity; powered functional test on a compatible T9800 chassis with active backplane communication; channel-level I/O verification using calibrated signal sources and measurement equipment; TMR voting logic confirmation — all three channels must produce consistent output under identical input conditions; and burn-in cycling to screen latent component failures. Test results are documented per unit and supplied with the shipment. Modules that fail any stage of the protocol are quarantined and not offered for sale.