HTT-20-1 Redundant Resolver Transducer

HTT-20-1 Redundant Resolver Transducer
  • Two independent, redundant, brushless resolvers in a single package
  • IP67 rated for heavy-duty industrial applications
  • Purpose built for redundant control system applications
  • All gearing internally housed in the transducer for reliability
  • Best angular accuracy and repeatability
  • 100% compatible with AMCI's complete line of resolver interface products
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    HTT20-1 drawings PDF version










    HTT-20-1 Redundant Brushless Resolver Transducer

    The HTT-20-1 redundant, single-turn brushless resolver transducer was developed for applications that require redundant control systems. Whether meeting mandated safety standards or a project's up time requirements, AMCI's HTT-20-1 Redundant Brushless Resolver Transducer will not fail. This transducer features two independent resolvers geared 1:1 to the input shaft that are encased in an IP67 rated anodized enclosure. Using anti-backlash gearing to insure accuracy and repeatability, the zero points of the two resolvers are mechanically aligned at the factory.

    The HTT-20-1 transducer is our smallest redundant resolver package that can be used when mounting space is at a premium. Plus the HTT-20-1 Redundant Brushless Resolver Transducer is the perfect solution when you must run two resolver based systems from a single shaft that require different resolvers. AMCI can install any size 11 resolver in the HTT-20-1, making it compatible with resolver based systems from all major manufacturers in the industry.

    AMCI also offers the HTT-400-1 package which is an industry standard 4 inch diameter package that has separate connectors for each of the resolvers.

    Also see AMCI's complete line of resolver interface solutions, enabling you to easily configure a resolver-based position feedback system in your favorite PLC, PAC, or network.

    Available Versions

    HTT-20-1: Single turn transducer, isolated resolvers
    Price | $2,175/ea

    Note: Pricing is US Domestic only



    Consult the factory for availability

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    Heavy-Duty Reliability

    The resolver transducer was originally developed to withstand the punishment of military applications, and has since benefited from more than 50 years of continuous use and development. Product packaging plants and stamping press lines are perfect examples of where you might find resolver based systems at work today.

    Builders and system integrators alike agree that the resolver transducer is unsurpassed in its ability to reliably supply rotary position data in the harshest industrial environments.

    The AMCI resolver product line is offered in aluminum or stainless steel construction, and boasts up to an IP67 rating. Solid shaft and hub shaft versions are available, and both types incorporate an oversized double row bearing that supports shaft loads up to 100 lbs. radial / 50 lbs. axial.

    Inside the Resolver Transducer



    Mechanical Specifications

    HTT-20-1 Resolver Transducer
    Shaft loading: 100 lbs. Radial / 50 lbs. Axial maximum shaft loading.
    At the listed shaft load, bearing life is rated for a minimum of 2X10ˆ9 revolutions.
    Starting torque:8 oz. in max @25° C
    Moment of inertia:8.75 X 10ˆ-4 oz-in-secˆ2
    Weight: 4 lbs.
    Housing:anodized aluminum
    Shaft:1070 carbon steel

    HTT-20-1 Connector Pinout: (Military Equivalent Part #: MS3102E20-27P)

    AR1 resolver A
    BR2 resolver A
    CS1 resolver A
    DS3 resolver A
    ES2 resolver A
    FS4 resolver B
    GS3 resolver B
    HS1 resolver B
    IR2 resolver B
    JR1 resolver B
    KNo connection
    LS4 resolver A
    MNo connection
    NS2 resolver B


    HTT-20-1 Resolver Transducer
    Any Size 11 Resolver manufactured by AMCI can be installed in the Redundant Brushless Resolver Transducer packages. The following table gives the electrical characteristics of the AMCI standard resolver, the R11X-J10/7, which is compatible with all of our electronics.

    See our Size 11 Resolver page for a complete list of available resolvers.
    Input Frequency:5000 Hz
    Rotor Input Voltage:7.0 V rms
    Stator Output Voltage:6.65 V rms
    Transformation Ratio:0.95 ± 5%
    Input Current:20 mArms typical, 34 mArms max.
    Phase Shift:10° max.
    Accuracy:max. error ±7 minutes


    HTT-20-1 Resolver Transducer
    Operating temperature:-40° C to 125° C
    Shock:50 G's for 11 mSec
    Vibration:15 g's to 2,000 Hz
    Enclosure:IP67 with mating connector properly installed


    Compatible Cables

    For all cables, (x) = length of cable in feet.


    AMCI Part NumberUses Connector


    Compatible Connectors

    Connectors are sold separately or as part of a pre-assembled cable.


    AMCI Part NumberMilitary Equivalent
    90 DegreeMS-22MS3108A20-27S



    Resolver transducers product family overview

    AMCI’s wide selection of resolver transducers, resolver interfaces for PLC based systems, and related accessories provide a complete, quality solution supported by over 25 years of product design, manufacturing, and application experience. Watch the video to learn more about these maximum duty rotary sensors!

    Duration 01:20


    Resolver Interfaces

    Resolver Interfaces Learn More


    Cables Learn More

    TMB-1 Bracket

    TMB-1 Bracket Learn More

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    Ordering Information

    AMCI's sales team takes the hassle out of placing your order. We'll advise on product selection, alternatives, lead times, and present you with point of purchase options. Call (860) 585-1254 or email AMCI sales today! 

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    Create your part number

    Generate the part number for your redundant brushless resolver transducer using the following helpful ordering guide. Starting from left to right, use the following diagram and table to choose the desired options.


    Part Number Guide

    Part Number CharacterHTT-20-1 Redundant Brushless Resolver Transducer Selections
    Resolver A Specification:J= AMCI Standard Resolver
    L= AVG Autotech/Gemco Compatible Resolver
    C= ElectroCam / Namco C&A Compatible Resolver

    AMCI can mount any of our Size 11 Resolver in these packages. Common resolvers are designated by the letters above:
    Resolver B Specification:J= AMCI Standard Resolver
    L= AVG Autotech/Gemco Compatible Resolver
    C= ElectroCam / Namco C&A Compatible Resolver

    AMCI can mount any of our Size 11 Resolver in these packages. Common resolvers are designated by the letters above:


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