Avtron SC65 Absolute Encoder

Avtron SC65 Absolute Encoder

Regain Protocol Flexibility!

  • Sine-Cosine Output for Velocity Control
  • SSI Output for Position Control
  • No Proprietary Protocol Required
  • Industry-Standard Mounting Flanges
  • Stainless Steel Shaft
  • 2-Year Warranty
Outline Drawing
The SC65 Sine-Cosine encoder offers unique combinations of output signals not found in ordinary absolute encoders.  It combines SSI output with sine-cosine incremental output.  The sine-cosine signals enable smooth and effective torque and velocity control.  The SSI absolute multiturn output gives positioning accuracy without the use of proprietary protocols.

The SC65 is designed for a variety of industrial applications, including wind power blade pitch controls, elevator motors, and other applications which require speed, position, and torque control all from a single device.

The SC65 features industry-standard flanges, shafts, and connectors, including pinout matching.  This allows direct replacement of competitors units without mechanical redesign, without wiring changes.. Even better, if there are wiring errors, the SC65 survives short circuits and reverse wiring polarity.

Competitive Sine-Cosine encoders limit your flexibility and lock you into  proprietary protocols. Set your application free with SC65!
Operating Power: Volts: 10 - 30 VDC
Output Formats: Gray, Binary, BDC; Sine/Cosine: 2048cpr
Accuracy: +/-0.007° 
Temperature: -25° to 85°C
Environment: IP67, IP65 shaft side
Speed:  6000 RPM max.
Shaft Load:  40N max.
Vibration: 10G, 5-2000Hz
Shock: 100g, 6mS 
Weight: 0.6lb [300g]


All dimensions are in inches [millimeters].
Specifications and features are subject to change without notice.
  • Absolute encoder with Sine/Cosine output
  • Compact housing
  • Free SSI parameters setting
  • Programmable scaling factor & Teach-in function
  • Up to 16384 turns
  • 1V p-p standard sine-cosine
  • Resistant to Magnetic Brake Fields                                                                                      
Industry General Food & Beverage Pulp & Paper Wood Products Wind Power Crane & Hoist Metals Mining Marine Oil & Gas

Light Mill Duty

AV20, AV25, AV32, AV4, AV6A, AV6M, HS25A, HS35A, HS4, HS6A, K661, SC65 		                   

Mill Duty

AV32, HS35M, HS6M, K661, M185, M3, M3(small), RAHS35M 		                   

Heavy Mill Duty

AV115, AV125, AV45, AV5, AV56, AV56S, AV67, AV85, AV850, AVSK, Carlen Replacement, HS45, K661, M4, M4(small), XP5, XR115, XR12, XR125, XR45, XR4F, XR5, XR56, XR85, XR850, XR97, XRB1, XRB2 		                   

Severe Mill Duty

AV12, AV30, AV485, AV5, AV685, Carlen Replacement, HS40, K661, M484, M6, M6C, M7, XP5, XPH1, XPH8, XR12, XR485, XR5, XR685, XR97, XRB1, XRB2, 		                   

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In This Section

  • Absolute Encoder

    Absolute indicates the position of the rotor or shaft referenced to a fixed starting position. If power is turned off and then on, the encoder recalls the position correctly. It may output the position information on a set of output wires (parallel), or it may output the absolute position using a communications bus, such as Profibus or DeviceNet. Absolute encoders can be single-turn or multi-turn. For more information, Wikipedia:  http://en.wikipedia.org/wiki/Rotary_encoder

  • Absolute Position

    Absolute Position indicates the position of a rotor or shaft referenced to a fixed starting position. Resolvers and absolute encoders can provide absolute position feedback.

  • Accuracy

    Encoder accuracy is the ability of or limit to the encoder to repeat the exact same signals, given the exact same mechanical position.  Accuracy and resolution may be independent--an encoder can have higher accuracy than resolution, and vice versa.  Avtron incremental encoders are typically accuracy rated at +/-1 count of their resolution; Avtron absolute encoder accuracy varies by model.

  • Bus

    A communications (field) bus is used to carry absolute encoder signals to the control system.  It may do so automatically on a clock signal input to the encoder (SSI), or in response to a message (ex:  Profibus, DeviceNet).  For more information on fieldbuses:  Wikipedia:  http://en.wikipedia.org/wiki/Fieldbus

  • Encoder

    A device which indicates position and speed via a set of digital outputs. Incremental encoders output quadrature (A Quad B) signals, and may add a marker pulse once per revolution.  Absolute encoders typically indicate position via a digital message, a set of parallel outputs, or analog values.

  • EnDat

    EnDat is a proprietary protocol used for some absolute encoders.  EnDat encoders are only manufactured by one company, eliminating competition.  Most controllers which support EnDat also support SSI, which is a open protocol to all vendors and is used by Avtron absolute encoders.

  • Multiturn

    Multiturn refers to the capability of an absolute rotary encoder to output the position accurately including how many times the shaft has been rotated.  The absolute encoder will report this position correctly, including both the position within 1 revolution as well as the total number of turns, whether the encoder was powered when the turns took place or not.  Avtron multiturn absolute encoders do not use batteries, and Avtron absolute magnetic encoders do not use gears for maximum reliability.  Example:  Avtron AV30 severe duty absolute encoder.  For more information on absolute rotary encoders-Wikipedia:  http://en.wikipedia.org/wiki/Rotary_encoder.

  • Optical Disk

    An Optical Disk is typically a glass, metal, or plastic disk with fine lines or slots etched around the perimeter that interrupt the beam of light from the light source to an optical sensor. Optical disks can be quite fragile. Avtron uses only shatterproof optical disks with Wide-Gap technology.

  • Optical Encoder

    An Optical Encoder typically uses a light source shining through, or reflecting off, an optical disk with lines or slots that interrupt the beam of light to an optical sensor. Electronics count the interruptions of the beam and generate the encoder’s output pulses.

  • Sine-Cosine Encoder

    An incremental device typically used to indicate rotary position and velocity. A sine-cosine encoder outputs a preset number of cycles per revolution (CPR) of analog sine waves, along with cosine waves (offset by 90°). Most sine-cosine encoders output ~1V peak-to-peak. Nidec Avtron does not presently offer sine-cosine models because sine-cosine signals are very vulnerable to electrical interference.

  • Solid Shaft

    Solid Shaft encoders are coupled to the shaft to be measured. The solid shaft encoder body is typically C-Face mounted using a flange adapter, or some models can be foot mounted.

  • SSI

    SSI (Synchronous Serial Interface) is a fieldbus used by Avtron absolute encoders to communicate speed and position to a controller.  SSI is extremely simple and fast.  SSI is also an effective, open vendor alternative to proprietary encoder fieldbuses such as EnDAT and HyperFace.   For more information about SSI-Wikipedia:  http://en.wikipedia.org/wiki/Synchronous_Serial_Interface

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