• Please try to be as accurate as possible with your search.
  • We can quote you on 1000s of specialist parts, even if they are not listed on our website.
  • We can't find any results for “”.
    SEE MORE
      SEE PRODUCTS IN SEARCH PAGE ()
      sales1@apterpower.com
      +86 181 0690 9650
      Request a

      Fast Quote

      Manufacturers
      ALL MANUFACTURERS
      • Please try to be as accurate as possible with your search.
      • We can quote you on 1000s of specialist parts, even if they are not listed on our website.
      • We can't find any results for “”.
        Manufacturers
        sales1@apterpower.com +86 181 0690 9650
        Choose a manufacturer
        ALL MANUFACTURERS
        Ask our team:
        • Phone: +86 181 0690 9650
        • E-Mail sales1@apterpower.com
        How We Verify Your Order
        Before dispatch, we confirm the exact model, revision, condition, inspection requirements and shipping documents for your order.
        See a real on-site verification case >>

        T8846C

        / 4.9
        1001 reviews ｜ Need a Specific Revision?
        T8846C is a Trusted Speed Input Field Termination Assembly (SIFTA) for T8442 TMR Speed Monitor, providing nine speed channels in three isolated groups for rotating machine protection.
        Get a quick price for T8846C
        Quantity
        *E-mail
        Company
        *Mobile
        *Content
        Upload (gif, jpg, jpeg, png, bmp, doc, docx, xls, xlsx, ppt, pdf, csv)
        Get a Quote
        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 T8846C

        • Manufacturer:
          ICS Triplex
        • Part Number:
          T8846C
        • Product Family:
          Trusted Triple Modular Redundant
        • Product Type:
          Speed Input Field Termination
        • Number of Speed Input Channels:
          9 (arranged as 3 groups of 3)
        • Input Groups:
          3 galvanically isolated groups
        • Monitor Interface Connectors:
          3 x 20-way connectors (mating with TC-801 cable)
        • Sensor Compatibility:
          Active (totem-pole/open-collector) or passive magnetic/inductive
        • Mounting:
          DIN rail
        • Weight:
          0.7 kg
        • Estimated shipping dimensions:
          33.5x12.3x6.5cm
        • Tariff Code:
          8547909000
        • 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 Diagnostics & Safety Upgrade Guide

        Features:

        • Provides nine speed input channels arranged as three galvanically isolated groups of three, with separate field power inputs for each group, preventing ground loops and cross-channel interference.
        • Supports active speed sensors and passive magnetic/inductive speed sensors, providing flexibility for different field device types.
        • Designed for standard DIN rail mounting with in-situ fuse replacement (no removal required).
        The T8846C is specifically designed for triple-redundant speed monitoring applications in safety-critical rotating machinery. It provides nine speed input channels configured as three groups of three channels each. This 3x3 arrangement directly corresponds to the T8442 TMR Speed Monitor's triple-modular redundancy architecture, where three independent processors each receive signals from one channel in each group. The galvanic isolation between groups—achieved through separate field power inputs and isolated signal interfaces—prevents electrical faults in one sensor group from affecting the other groups.

        The T8846C is designed to interface with a wide variety of speed sensing technologies commonly used in industrial turbine and compressor applications. For active sensors (Hall effect or proximity-based devices), the T8846C supports both totem-pole outputs (push-pull) and open-collector outputs (requiring pull-up resistors). This flexibility allows the same FTA to work with sensors from multiple manufacturers without additional interface circuits. For passive sensors—typically variable reluctance magnetic pickups that generate their own AC voltage as gear teeth or slots pass by—the T8846C includes the necessary signal conditioning to convert these raw AC signals into logic-level pulses that the T8442 Speed Monitor can process.

        The T8846C is engineered for practical installation and maintenance in industrial control cabinets. Its DIN rail mounting format allows quick attachment to standard 35mm DIN rails without special tools, reducing installation time and ensuring consistent mechanical alignment with other Trusted system components. A key maintenance feature is the ability to replace fuses in situ—without removing the T8846C from the DIN rail or disconnecting field wiring.

        The T8846C ICS TRIPLEX Speed Input Field Termination may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

        ICS TRIPLEX T8846C Speed Input Field Termination 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 T8846C Speed Input Field Termination Specs

        General

        • Manufacturer ICS TRIPLEX
        • Model T8846C
        • Condition New Original ready stock
        • Product Family T8461,T8151B,T8431,T8830C
        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.
        • Turbomachinery Control: Over-speed trip and interlock protection for Steam Turbines and Gas Turbines in power plants and refineries.
        • Integrated Turbine Compressor Control (ITCC): Speed monitoring for large centrifugal and axial compressors in oil & gas upstream, pipelines, and chemical plants.
        • Critical Pump and Fan Systems: High-pressure pumps in LNG terminals, large cooling tower fans, and emergency ventilation systems.
        • Group Isolation Architecture:The 9 speed monitor channels are strictly divided into 3 independent machinery groups (3 channels per group).
        • Line Monitoring & Loop Diagnostics:In tandem with the T8442 module, it continuously monitors the field loop status. It can detect and precisely alarm for Open Circuit (wire break), Short Circuit, and abnormal signal degradation.
        • Redundant 24 Vdc Supply: Field power is diode-commoned on the FTA. If one power feed fails, the system continues running seamlessly.
        • Overcurrent Fusing: Each channel/group is protected by individual fuses to prevent field overloads from damaging the module. These fuses support in-situ replacement.
        • Mounting: Mounts onto standard 35mm DIN rails in either vertical or horizontal orientations.
        • Grounding: Proper termination to the enclosure Earth (PE) and System Safety Earth is mandatory to suppress High-Frequency Electromagnetic Interference (EMI) generated by rotating machinery.
        • Form-Factor Compatibility: The T8846C shares identical dimensions, pinouts, and electrical properties with the non-coated T8846.
        Description
        The T8846C is a Speed Input Field Termination Assembly (SIFTA) designed for use with the Trusted T8442 TMR Speed Monitor system. It provides the input field interface for three rotating machine groups, offering nine speed input channels arranged as three groups of three.

        The T8846C offers versatile input connectivity, compatible with active speed sensors (totem-pole or open-collector outputs) and passive magnetic/inductive speed sensors. Each T8442 Speed Monitor hot swap pair requires a single T8846C when installed in a Trusted system. 

        Field power is provided to the T8846C via three 4-way connectors, each dedicated to one speed input group. The interface to the T8442 Speed Monitor is provided via three 20-way connectors, each mating directly with the Trusted TC-801 cable assembly. The T8846C includes dedicated terminals for connecting cable shielding to chassis ground for noise immunity. 

        The T8846C works in conjunction with the T8846 SIFTA, T8442 TMR Speed Monitor, and T8891 Speed Output FTA (SOFTA) to form a complete speed monitoring system. The T8846C features nine identical speed transducer signal conditioning circuits, with each of the three groups galvanically isolated from the others.
        Alternative Names
        T8800 T8830 T8850 T8850C T8830C T8431 T8151B T8461
        Technical notes
        The T8846C is a DIN rail-mounted Speed Input FTA for Trusted T8442 TMR Speed Monitor systems. Features 9 speed channels (3 isolated groups of 3), supports active and passive sensors, replaceable in-situ fuses, and chassis ground studs. Requires TC-801 cable to interface with T8442 monitor. Multiple sensors required for SIL 3. Part of Trusted speed monitoring product range.
        Exceptional Service

        Our Mission

        • 100% Satisfaction

          We believe expertise is priceless. With over 20 years of experience, and top engineers on staff, we can help you solve or avoid problems that threaten your business.

        • Trust Guaranteed

          Not only do we have a vast inventory, our team makes sure every piece of equipment is in working condition. Your purchases are also backed by our Warranty.

        • Expertise

          Time is money, especially when your equipment is down. We work quickly to get your equipment on its way so you can get it back up and running.

        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 T8846C?
        The T8846C provides the input field interface between field speed sensors and the Trusted T8442 TMR Speed Monitor. It conditions signals from up to nine sensors (three groups of three) for rotating machinery speed monitoring.
        What types of speed sensors can T8846C interface with?
        The T8846C supports three sensor types: active speed sensors with totem-pole outputs, active sensors with open-collector outputs, and passive magnetic/inductive speed sensors (e.g., variable reluctance pickups).
        How many T8846C assemblies are required per T8442 Speed Monitor?
        Each T8442 Speed Monitor hot swap pair requires a single T8846C SIFTA when installed in a Trusted system. The T8846C serves all three speed input groups for the monitor.
        Does T8846C provide isolation between input groups?
        Yes, the T8846C provides galvanic isolation between each of the three speed input groups. Each group has its own separate field power inputs and isolated I/O signal interfaces to prevent ground loops and cross-channel interference.

        You May Also Like

        Product Browsing History