Avtron HS40 Absolute Encoder

Avtron HS40 Absolute Encoder

Severe Duty? Absolutely!

  • Fits Shafts 5/8"-1 1/8" [16mm-30mm]
  • Up to 27 Bit Resolution
  • Moisture-Proof, Shock Resistant Sensor
  • Singleturn or Multiturn
  • IP65 Rating
  • Massive Bearings, Severe Duty Seals
  • No Batteries or Gears!
  • -40° to 85°C Operation
  • 3 Year No-Hassle Warranty
Outline Drawing
HS40 hollow shaft severe duty magnetic absolute rotary encoders offer unequaled durability.  HS40 features massive bearings and the best shaft sealing system in the industry to keep your process running, through temperature cycling and liquid sprays.  Moreover, the magnetic sensor can see through oil, dust and dirt that disable ordinary optical absolute encoders.  Also available:  solid shaft model (AV30), absolute+incremental combo units (AV45, HS45), as well as optical models (AV6A, HS6A) for ultra-precision applications.

By utilizing Wiegand wire energy harvesting technology combined with magnetic sensors, Avtron has created an absolute encoder design which requires no batteries, long-term capacitors, glass disks, or gears!  

Unlike other absolute encoders, HS40 allows a full size shaft fit; this allows it to easily fit on both NEMA and IEC frame motors with no special modification needed.  Isolation from shaft currents is standard, and the interchangable bore sizing inserts allow easy modification.

The HS40 features a broad range of industry standard communication protocols:  from analog outputs to CANopen, Profibus, J1939, and SSI, you will find the communication protocol you need.

Get the absolutely best hollow shaft encoder available for your positioning application--pick HS40!

Operating Power: 
     SSI:  5-30VDC; 30mA @ 24VDC, 125mA @ 5VDC
     Analog V Out:  12-30VDC; 15mA @ 24V
     Analog I Out:  15-30VDC; 40mA @ 24V
Output Format: Analog, Profibus, SSI, CANopen, J1939
Accuracy: +/-0.35° (+/-21 arc-min)
Temperature: -30°C to +85°C
Environmental: IP65
Vibration: 10-1000Hz, 10G
Shock:  200G, 3mSec
Weight: 4.8 lb [2200g]
Certifications:  CE
  • No internal gearbox to wear out
  • No coupling needed-mounts directly on motor shaft
  • Zero-Position set button for SSI output
  • Optional factory-programmable cam limits
  • Optional 5V operation
  • More than 6X the axial and side load capability of the competition
Industry General Food & Beverage Pulp & Paper Wood Products Wind Power Crane & Hoist Metals Mining Marine Oil & Gas

Light Mill Duty

AV20, AV25, AV6A, AV6M, Avtron Elevator Encoder, Cables and Connectors, Encoder Couplings, Encoder Programming Tool, HS25A, HS35A, HS6A, K661, SC65

Mill Duty

AV32, Cables and Connectors, Encoder Couplings, HS35M, HS35X, HS6M, K661, M185, M3, M3(small), RAHS35M

Heavy Mill Duty

AV115, AV125, AV44, AV45, AV56, AV56-Wind, AV56S, AV67, AV85, AV850, AVSK, Cables and Connectors, Carlen Replacement, HS44, HS45, K661, M4, M4(small), XP5, XR115, XR12, XR125, XR45, XR4F, XR5, XR56, XR67, XR85, XR850, XR97, XRB1, XRB2, XRB3

Severe Mill Duty

AV12, AV30, AV485, AV5, AV685, Cables and Connectors, Carlen Replacement, Encoder Couplings, HS40, K661, M484, M6, M6C, M7, XP5, XPH1, XPH8, XR12, XR485, XR5, XR685, XR97, XRB1, XRB2, XRB3,
Avtron HS40 optical absolute encoders are a great upgrade to replace many competitive models, including:

Allen Bradley:  842A, 842D, 842E, 845GM, 845D, 845G
Dynapar/ACURO:  AD35, AD36
Heidenhain:  ECN413, EQN425
Pepperl+Fuchs:  AVS36M, AVS42H,BVM58, BVS58,  CVM36M, CVS36M, CVM42H, CVS42H, CVM58, CVS58, CVM58S, CVS58S, DVM58, DVS58, EVM58, EVS58, FVM58, FVS58,  PVM58, PVS58, RVS58S
As well as replacing many other hollow shaft absolute rotary encoders.
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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.

  • Coupled/Coupling

    Refers to a flexible device that is used to link a solid shaft encoder to the shaft to be monitored. Avtron strongly recommends isolated, flexible disk style couplings in heavy duty applications to maximize encoder bearing life. For light mill duty applications, flexible helical couplings are a great option. If there's a large amount axial shaft movement or misalignment, shift to magnetic couplings.

  • Cycles Per Revolution (CPR)

    This is the sine-cosine encoder equivalent to PPR. It indicates the number of sine waves output per revolution, and does not count the cosine waves. Some vendors also use CPR as an equivalent to PPR for digital incremental encoders.

  • DeviceNet

    DeviceNet is a fieldbus used by Avtron absolute encoders to report position and speed to a controller.  DeviceNet uses a 4 wire main bus+drop wiring system (CAN).  DeviceNet is hardware-identical to CANopen and J1939, but the encoder messages sent are different.  For encoder communications, SSI, Ethernet, or Profibus may be faster than DeviceNet.  For more information on DeviceNet-Wikipedia:  http://en.wikipedia.org/wiki/Devicenet

  • 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.

  • Fieldbus

    A Fieldbus (communications wiring hardware and software standard) 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

  • GSD

    GSD files are text files used in Profibus configuration to instruct the master/scanner device of the information coming from each device (bytes/words/meanings).  The user of Avtron encoders downloads the file, then adds it to his configuration software.  Then he can add Avtron absolute encoders to his bus configuration.  Avtron absolute encoder GSD files are found in the Documents tab for each encoder, on the product page.

  • Hiperface

    Hiperface is a proprietary encoder communications system.  Hiperface encoders are only manufactured by one company.  Most devices that support Hiperface also support SSI, an open vendor protocol supported by most controller manufacturers, and used by Avtron absolute encoders.

  • Hollow Shaft

    Hollow Shaft encoders mount by passing the shaft of the motor into or through the encoder. Hollow shaft encoders are easy to mount and replace but are vulnerable to damage. Also, the weight of the encoder must be considered for small motor shafts < 0.75" diameter. Avtron offers a full range of hollow shaft encoders, including: AV685, HS25A, HS35A, HS35M, M3, M4, M6, M7, XP45.

  • J1939

    J1939 is a fieldbus used by Avtron absolute encoders to report position and speed to a controller.  J1939 uses a 4 wire main bus+drop wiring system (CAN).  J1939 is hardware-identical to DeviceNet and CANopen, but the encoder messages sent are different; J1939 is primarily used on mobile vehicles.  For encoder communications, SSI, Ethernet, or Profibus may be faster than J1939.  For more information on J1939-Wikipedia:  http://en.wikipedia.org/wiki/J1939

  • Magnetic Encoder

    Magnetic and magnetoresistive encoders typically use a magnetized rotor with north and south poles lined up around the perimeter of the disk. A magnetoresistive sensor detects the transitions, and these are the counts or pulses generated by the encoder. Magnetic encoders withstand dirt, dust, water, and temperature changes far better than optical encoders.

  • Motor Shaft Currents

    The high-speed switching of variable frequency drives that is used to control the speed of motors often produces current which flows from the motor shaft to ground, or from end-to-end of the motor.  These current are highly destructive to both motor and encoder bearings.  Preventing shaft current damage is essential.  Most Avtron hollow shaft encoders include features to prevent motor shaft current damage.  For more information:  http://www.avtronencoders.com/knowledge-base/eliminating-damage-from-motor-shaft-currents-through-tachometers-and-encoders or visit Wikipedia:  http://en.wikipedia.org/wiki/Shaft_voltage

  • 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.

  • Profibus DP

    Profibus DP is a fieldbus used by Avtron absolute encoders to communicate speed and position to a controller.  For more information about Profibus DP-Wikipedia:  http://en.wikipedia.org/wiki/Profibus

  • Resolution

    Resolution describes how many individual slices or positions can be reported by an incremental or absolute encoder.  For incremental encoders the number of PPR (pulses per revolution) expresses resolution; for absolute encoders, PPR, or counts per turn or bits of resolution may be listed.

  • Single Turn

    Single turn refers to absolute encoders--the encoder accurately reports the position within 360 degrees of travel to the resolution specified.  Multiple turns are ignored--multiturn absolute encoders are required to track and report position over multiple turns as well as the position within 1 turn.  Avtron absolute single-turn encoders are more durable because they don't use glass disks.  For more information about absolute rotary encoders:  Wikipedia:  http://en.wikipedia.org/wiki/Rotary_encoder

  • 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

  • Wiegand wire

    Wiegand wires generate a pulse of electricity in a coil as a magnet passes near the wire.  Wiegand wires are used in Avtron absolute magnetic encoders to self-power the multi-turn counting engine, so even if the encoder has no power when turned, the absolute encoder correctly reports the number of turns and position.  This allows Avtron to eliminate the glass disks and gears that cause failures in other absolute encoders.  For information on the Wiegand effect-Wikipedia: http://en.wikipedia.org/wiki/Wiegand_effect , Wiegand wire: http://www.epanorama.net/sff/Power%20Electronics/Transformers_and_Magnetics/Magnetics%20-%20Wiegand%20Wire.pdf

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