Description
The GE IC660TBA026M is a highly specialized and advanced communication interface module from the GE Fanuc Genius® I/O system, specifically engineered as a Genius Bus to Triple Modular Redundant (TMR) Gateway. This module serves as a critical and secure bridge between the standard Genius bus network and a high-availability, fault-tolerant safety system, such as GE’s RX3i PacSystems with Profibus or a dedicated TMR controller. The core function of the GE IC660TBA026M is to provide a robust and deterministic data pathway, allowing a safety-rated TMR system to reliably monitor and control standard Genius I/O blocks. It achieves this by implementing sophisticated protocol conversion and data synchronization across its interfaces. The module is designed with a focus on integrity and diagnostics, ensuring that data exchanged between the networks is accurate and that any communication faults are immediately detected and reported. The GE IC660TBA026M is an essential component for applications requiring an elevated level of safety and availability, enabling the integration of proven Genius I/O into architectures where fault tolerance is non-negotiable, thereby protecting personnel, equipment, and the environment.

IC660TBA026M GE
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | IC660TBA026M |
| Manufacturer | GE (General Electric), now part of Emerson’s PLC portfolio |
| Product Type | Genius Bus to TMR Gateway Module |
| Compatible Network Side A | Genius Bus |
| Compatible Network Side B | TMR Bus (Proprietary, to TMR Controller) |
| Number of Genius Drops Supported | Up to 32 (Configurable) |
| Genius Bus Baud Rate | 153.6 kbaud |
| TMR Bus Protocol | Proprietary Synchronous Protocol |
| Isolation | 1500V AC between Genius bus and TMR bus |
| Power Requirements | 24V DC (from external power supply) |
| Power Consumption | 1.5A @ 24V DC (max) |
| Operating Temperature | 0 to 60 °C (32 to 140 °F) |
| Storage Temperature | -40 to 85 °C (-40 to 185 °F) |
| Status Indicators | LEDs for Power, Genius Status, TMR Status, Module Fault, Diagnostics |
| Safety Certification | Designed for use in safety instrumented systems (SIS) |
Main Features and Advantages
Secure Gateway for High-Availability Systems: The primary function of the GE IC660TBA026M is to provide a secure, deterministic, and highly reliable communication link between a standard Genius I/O network and a fault-tolerant TMR safety controller. It handles the complex protocol conversion and data synchronization required for this interaction, ensuring that critical process data from Genius blocks is accurately and promptly delivered to the TMR system for processing within its safety logic.
Advanced Diagnostic and Fault Reporting: A critical feature for any safety system component, the GE IC660TBA026M is equipped with extensive diagnostic capabilities. It continuously monitors the health of both the Genius bus and the connection to the TMR controller. Detailed status information and any detected faults are reported immediately through its LED indicators and to the TMR system itself, enabling rapid response to any communication issues and supporting the overall high availability and integrity of the safety loop.
Enhanced System Integrity and Data Validation: The module employs data validation techniques to ensure the integrity of information passing between the two networks. This is paramount in safety applications where corrupted or stale data could lead to incorrect actions by the safety controller. The design focuses on preventing single points of failure within the communication path, contributing to the overall safety integrity level (SIL) of the system.
Flexible Integration and Configuration: The GE IC660TBA026M allows for the flexible integration of a wide range of standard Genius I/O blocks—including discrete, analog, and special function modules—into a high-availability TMR architecture. This enables engineers to leverage the cost-effectiveness and variety of the Genius I/O ecosystem while still meeting stringent safety requirements. The module is configured using specialized software tools that ensure proper mapping and alignment with the TMR system’s expectations.
Application Field
The GE IC660TBA026M is deployed in critical process industries where safety and high availability are paramount and where there is a need to integrate standard GE Genius I/O into a fault-tolerant control architecture. It is extensively used in oil and gas facilities, such as offshore platforms and refineries, to connect Genius I/O from fire and gas detection systems and emergency shutdown (ESD) valves to a TMR safety controller. In chemical processing plants, it is used to integrate critical process measurements and interlock signals into the safety system. Power generation facilities, particularly in turbine control and burner management systems, utilize the GE IC660TBA026M to ensure the reliable acquisition of trip signals. Any application requiring a Safety Instrumented System (SIS) that must interface with a large number of field devices benefits from the secure gateway provided by the GE IC660TBA026M.

IC660TBA026M GE
Related Products
GE RX3i TMR Controller: The fault-tolerant controller that the IC660TBA026M would typically interface with on the TMR side.
GE Genius I/O Blocks (e.g., IC660ELB921, IC660EJD920): The discrete and analog I/O blocks that are connected to the Genius bus side of the gateway.
GE IC660BBD101: A standard Genius Bus Controller for Series 90-70 systems, highlighting the difference between standard and safety-focused gateways.
GE VersaMax I/O with Safety: GE’s newer generation of I/O that includes native safety-certified modules.
GE Profibus Modules for RX3i: Alternative communication modules, showing the TMR gateway’s specific niche.



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