Avtron AV6M Absolute Encoder

Avtron AV6M Absolute Encoder

Absolute Performance

  • Standard 36mm and & 58mm Sizes
  • Up to 27 Bit Resolution
  • Moisture-Proof, Shock Resistant Magnetic Sensor
  • Singleturn or Multiturn
  • Up to IP69K Rating
  • Superior Bearings and Seals
  • No Batteries or Gears!
  • -40° to 85°C Operation
  • 2 Year No-Hassle Warranty
Outline Drawing
AV6M shafted magnetic absolute rotary encoders offer excellent performance and durability in a cost-effective package.  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!   Also available:  hollow shaft model (HS6M), severe duty models (AV30, HS40), as well as optical models (AV6A, HS6A) for ultra-precision applications.

AV6M encoders have superior shaft seals and bearings that stay sealed to keep contaminants out, through temperature cycling and liquid sprays.  Moreover, the magnetic sensor can see through oil, dust and dirt that disable ordinary optical absolute encoders.

The AV6M features a broad range of industry standard communication protocols:  from analog outputs to CANbus, DeviceNet, J1939 and SSI, you will find the communication protocol you need.

Our AV6M encoders combine magnetic sensors and superior bearing and seal technology to give top performance in industrial applications.  Select AV6M today!

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, CANOpen, DeviceNet, J1939, SSI (Profibus coming!)
Accuracy: +/-0.35° (+/-21 arc-min)
Temperature: -40°C to 85°C* (Std -30°C to +85°C)
Environmental: IP69K* (Std IP65)
Shaft Load:  180N axial, 180N radial* (std. 40N axial, 110N radial) 
Vibration: 5-2000Hz, 30G*; (Std 10G)
Shock:  300G, 6mSec* (Std 200G, 3mSec)
Weight: 0.33-0.40lb [150-180g]
Certifications:  CE

*Extended temp. range, shaft load capability, shock and vibration rating require 30mm flange style "6"
  • More than 2X the axial and side load capability of the competition
  • No internal gearbox to wear out
  • Software settable zero point for SSI output
  • Optional factory-programmable cam limits
  • Optional 5V operation
  • Shock and vibration withstand upgrade available
Industry General Food & Beverage Pulp & Paper Wood Products Wind Power Crane & Hoist Metals Mining Marine Oil & Gas

Light Mill Duty

AV20, AV25, AV32, AV6A, AV6M, HS25A, HS35A, HS6A, HS6M, K661,
                   

Mill Duty

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

Heavy Mill Duty

AV115, AV125, AV45, AV5, AV56, AV56S, AV67, AV85, AV850, AV850Test, AVSK, Carlen Replacement, HS45, K661, M4, M4(small), 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, XR12, XR485, XR5, XR685, XR97, XRB1, XRB2,
                   
Avtron AV6M magnetic absolute encoders replace many competitive models, including:

Allen Bradley:  842A, 842D, 842E, 845GM, 845D, 845G
BEI: H25, HMT25, L18
Dynapar/ACURO:  AC36, AD25, AD34, AD35, AI25
Heidenhain:  ROC410, ROC412, ROC413, ROQ425
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 standard 58mm diameter shafted, flanged 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.

  • CANopen

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

  • 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 wherever possible to maximize encoder bearing life. For large axial shaft movement, splined couplings should be used.

  • CPR

    Counts Per Revolution.  Used to express the resolution per turn of an absolute encoder.  (Similar to PPR in an incremental encoder).  CPR is sometimes also expressed as bits of resolution per turn (example 12 bits = 4096 CPR).

  • 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

  • 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

  • Flange Adapter

    A Flange Adapter provides the NEMA 56C motor mounting face and properly locates the encoder shaft. The encoder shaft and motor shaft are then connected using a flexible coupling. (Drawing "A") Often flange adapters can be eliminated by directly mounting a modular encoder such as an Avtron AV125, AV850, AV56, AV67, AV85, AV115 unit on the motor flange. (Drawing "B")

  • Foot Mount

    Foot Mount encoders are bolted to a motor foot, shelf, or other nearby location. The solid shaft encoder is coupled to the shaft to be monitored. Modern Avtron encoders (AV485) require a separate foot mounting bracket. To eliminate coupling and alignment maintenance issues, foot mounting installations can be upgraded to a hollow shaft encoder such as the AV685.

  • 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.

  • 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

  • Light Mill Duty

    Light Mill Duty encoders are designed for industrial applications but must be protected from contamination, temperature cycling, and physical force, including shock, vibration, and bearing loads. Examples include AV20, AV25, HS25A, and HS35A models.

  • Light Source

    Typically an IR LED or laser which shines through or on the optical disk of an encoder. The light source is received by the optical sensor.

  • M12 Connector

    M12 (12mm) connectors are a screw or push-on style connector used by Avtron incremental and absolute encoders.  There are different pin quantities, pinouts, and keying, depending on the vendor style supported by the product.  M12 mating cables are typically overmolded, rather than field-solderable, such as MS connectors, or screw terminals, such as EPIC connectors.

  • M23 Connector

    M23 (23mm) connectors are a screw or push-on style connector used by Avtron incremental and absolute encoders.  There are different pin quantities, pinouts, and keying, depending on the vendor style supported by the product.  M23 mating cables are typically overmolded, rather than field-solderable, such as MS connectors, or screw terminals, such as EPIC connectors.

  • 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.

  • Magnetic Rotor

    A magnetized disk with multiple north and south poles lined up around the perimeter of the disk. A magnetoresistive sensor detects the transitions and generates the pulses generated by the magnetic encoder.

  • 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.

  • 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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