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        T8901

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        T8901 is an ICS Triplex Trusted Expander Interface Module, providing high-speed (250Mbps) communication to connect Expander and Controller chassis for system I/O expansion with TMR fault tolerance.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
        Shipping Mode
        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for T8901

        • Manufacturer:
          ICS Triplex
        • Part Number:
          T8901
        • Product Family:
          Trusted Triple Modular Redundant
        • Product Type:
          Interface Module
        • Data Transfer Rate:
          Up to 250 Mbps
        • Function:
          Interface between Controller Chassis and Expander Chassis
        • Connects Via:
          Expander Interface Hot Link Cable (TC-301)
        • Status Indicators:
          LED (Green: Healthy / Red: Fault)
        • Supported Protocols:
          Modbus, Profibus
        • Applications:
          ESD, F&G, Turbine Control
        • Weight:
          1.1 kg
        • Estimated shipping dimensions:
          30.1x3.2x26.8cm
        • Tariff Code:
          8517795000
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen, Fujian, China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Application Communication Safety & Compliance

        Features:

        • The T8901 provides the interface between the main Trusted Controller and remote I/O chassis, offering data transfer rates of up to 250 Mbps via the Expander Bus to ensure real-time synchronization
        • It is built with Hardware-Implemented Fault Tolerance (HIFT). The module supports 3-2-0 redundancy, preventing a single component failure from interrupting communication to the expansion chassis
        • Equipped with diagnostic LEDs that provide immediate visual feedback: a steady green light indicates a healthy slice or connection, while a flashing red light indicates a fault or transmission error on the corresponding channel
        The T8901 is the backbone for expanding the physical I/O capacity of a Trusted safety system. It serves as the dedicated Expander Interface Module, located in the processor slot of the expansion chassis . When a standard chassis does not provide enough slots for I/O modules, the system designer uses the T8901 to link a secondary "Expander Chassis" back to the main "Controller Chassis." This connection utilizes a high-performance Expander Bus that achieves data transfer rates of up to 250 Mbps .

        Reliability is the cornerstone of the T8901, achieved through Triple Modular Redundancy (TMR). Inside the module, critical circuits are triplicated . These three channels process the same data simultaneously and vote on the output. The module employs Hardware-Implemented Fault Tolerance (HIFT), which allows it to handle single-point hardware failures autonomously. For instance, if a communication driver on one channel fails, the T8901 automatically detects the discrepancy and votes out the faulty channel, while the remaining two channels maintain the link to the expansion chassis .

        The T8901 is designed for easy maintenance in live industrial environments. The front panel is equipped with a series of LED indicators that provide a clear, real-time window into the health of the module . Operators can see at a glance if the module is in Active mode, if the channels are healthy (Steady Green), or if a fault has been detected (Flashing Red). Furthermore, the T8901 supports Smart Slot technology .

        The T8901 ICS TRIPLEX Interface Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

        ICS TRIPLEX T8901 Interface Module Manuals, Datasheets, Drivers, Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        ICS TRIPLEX T8901 Interface Module Specs

        General

        • Manufacturer ICS TRIPLEX
        • Model T8901
        • Condition New Original ready stock
        • Product Family T8850C,T8850,T8830,T8461CX
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Distributed Process Safety Systems: Used when safety I/O modules span multiple cabinets or control rooms across a plant, linking local and remote expander chassis.
        • Emergency Shutdown (ESD) Systems: Deployed in large-scale upstream oil and gas production platforms, refineries, and chemical facilities to ensure unified, zero-latency safety execution across a massive I/O footprint.
        • Fire & Gas (F&G) Protection Networks: Connects main logic solvers to distant I/O chassis managing safety zone field actuators, detectors, and sub-stations.
        • Chassis-to-Chassis Extension: Resides in the dedicated processor slots of a Trusted Expander Chassis, functioning as the "slave" interface to the primary host processor chassis.
        • Expander Bus Architecture: Utilizes standard Unshielded Twisted Pair (UTP) copper cabling to distribute the high-speed Inter-Module Bus (IMB) between separated chassis.
        • Hardware-Implemented Fault Tolerance (HIFT): Incorporates dedicated TMR voting logic at the bus interface. It validates and votes data 2oo3 (Two-Out-Of-Three) to prevent transient, intermittent, or permanent bus communication faults from propagating.
        • Functional Safety Certification: Fully TÜV Certified up to IEC 61508 SIL 3 (Safety Integrity Level 3) capabilities when deployed in a valid Trusted TMR safety configuration.
        • Fault Containment Regions (FCR): Designed with strict physical and electrical isolation boundaries. An internal hardware failure within the T8901 is localized, preventing common-cause failures from taking down the expander chassis backplane or the wider system.
        • Electromagnetic Compatibility (EMC): Compliant with industrial emissions and immunity standard EN 61000-6-4 as well as the Radiocommunications Standard (e.g., RCM compliance), making it highly resistant to harsh electrical noise generated by industrial switchgear.
        Description
        The T8901 is a Trusted Expander Interface Module designed to connect an Expander Chassis to the Controller Chassis in an ICS Triplex TMR system . Physically located in the processor slot on the left side of the expander chassis, the T8901 provides the critical communication backbone for expanding I/O capacity. 

        Leveraging a Triple Modular Redundant (TMR) architecture, the T8901 ensures the highest levels of system availability. It features a hardware-implemented fault tolerance (HIFT) design, meaning that any single component failure within the T8901 will not cause a loss of communication to the expansion chassis.

        The T8901 supports high-speed data transfer, achieving communication rates of up to 250 Mbps . It interfaces with the expander adapter unit using a dedicated hot-link cable (TC-301). The front panel is equipped with diagnostic LED indicators; a steady green light indicates a healthy module slice or successful connection, while a flashing red indicates a fault in the corresponding slice .

        Installation and maintenance of the T8901 are user-friendly, featuring standardized interfaces and "Smart Slot" technology . This technology allows for module replacement or upgrades without interrupting the operation of the active system.
        Alternative Names
        T890I T8153C T8122 T8800 T8461CX T8830 T8850 T8850C
        Technical notes
        The T8901 is a critical Trusted Expander Interface Module. It links the Controller and Expander Chassis to expand I/O capacity. It features a TMR architecture (HIFT) for fault tolerance and high-speed communication up to 250Mbps . LED indicators provide real-time health status . Smart Slot technology supports hot replacement. Essential for ESD and F&G systems .
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What is the primary function of the T8901?
        The T8901 acts as the Expander Interface Module . Its main job is to connect an Expander Chassis to the main Controller Chassis, allowing the system to add more I/O modules while maintaining TMR fault tolerance and high-speed communication.
        How does the T8901 ensure system reliability?
        The T8901 utilizes a Triple Modular Redundant (TMR) architecture . It features Hardware-Implemented Fault Tolerance (HIFT) with 3-2-0 redundancy, meaning it can suffer a single component failure and continue operating without interruption .
        How fast is the communication on the T8901?
        The Expander Bus provided by the T8901 supports a very high data transfer rate of up to 250 Mbps . This high speed is critical for synchronizing large amounts of I/O data between the main processor and remote expansion racks in real-time.
        Can I replace a T8901 without shutting down the system?
        Yes, the T8901 supports Smart Slot technology . This allows the module to be replaced or upgraded while the system is still powered and running ("hot swap"), provided a redundant module is managing the bus.

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