Product Details

AV25

Tough and Compact!

Shaft Sizes Include 1/4", 3/8", and 10mm
Simple Installation
Unbreakable Optical Disk
Up to 5000 PPR
Wide-Gap Technology: Up to 8X larger gap between sensor and rotor
Directly Replaces H25, HA525, HA625, HC525, HC625, HR525, HR625, H42 and Many Other Standard 2.5" Encoders
Industry Standard Face or Flange Mounting
IP65/Nema 4 Rating: Dust and Liquid Tight
Superior Bearings and Seals
-40°C to +100°C Operation *
2 Year No-Hassle Warranty

CONFIGURE & PRICE ENCODER

Product Manual

Data sheet

Accessories

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Description

AV25 incremental quadrature rotary encoders fit a vast array of applications, from coupled AC and DC motor shafts, servos, conveyors, and most any machine.The solid aluminum housing, and stainless steel shaft offer increased durability in tough environments. Also available: AV20 encoders for 2.0" flanges and AV45 for 85mm flanges.

Avtron rotary encoders have superior shaft seals and bearings that stay sealed to keep contaminants out, through temperature cycling and liquid sprays. Our encoder seals are protected by mechanical barriers to prevent flexing or failure. Avtron’s superior bearings permit much larger side and axial loads for pulley and belt applications, and feature synthetic lubricants for even longer life in all applications.

Many competitive optical encoder designs risk sensor damage from any vibration or shock: sensors ride less than four thousandths of an inch from the thin, often flexible, optical disk spinning at full motor speeds. Some designs even use thin glass disks in “industrial” products! Avtron uses only unbreakable disks and a sensor to disk gap over 8X larger than the competition.

Our optical AV25 encoders use superior sensor, disk, bearing, and seal technology to give top performance in industrial conditions. Select an Avtron AV25 today!

Specifications

Operating Power: Volts: 5 - 28 VDC; Current: 50mA, no load

Output Format: (A, /A, B, /B, Z, /Z available)

Frequency Range: 0 to 125 kHz

PPR: 1 - 5000 Standard

Speed: 6000 RPM Max., (for higher speeds, consult factory)

Temperature: -40° to 100°C *

Environment: IP65

Vibration: 5-2000Hz

Shock: 50G, 11ms duration

Weight: 0.95 lbs [431g]

* Please consult factory for temperature/speed derating

More Advantages

All-digital design, no trim pots or adjustments for longer life
Advanced sensor technology
Superior bearings with synthetic lubricant for longer life
No extra charge for signal complements and marker pulse
More than 2X the axial and side load capability of the competition
Superior line drivers withstand short circuits and reverse voltage wiring errors.

Markets & Applications

Industry	Mining	General	Wind Power	Pulp & Paper	Oil & Gas	Marine	Metals	Machinery	Crane & Hoist
Light Mill Duty HS4 Encoder Programming Tool Cables and Connectors Encoder Couplings RUSH AV4 AV25 HS25A AV6A HS6A K661 AV6M AV4 HS35A AV20
Mill Duty M185 Cables and Connectors Encoder Couplings AV32 HS35M HS6M K661 M3 HS35X
Heavy Mill Duty XRB3 AVSK Cables and Connectors AV56S XR45 AV44 AV45 AV56A XR5 XR12 AV85A HS45 K661 XP5 XR115 XR125 XR4F XR56A XR850 XR85A AV115 AV125 AV67A HS44 AV850 SMT1
Severe Mill Duty XRB3 Cables and Connectors Encoder Couplings AV5 AV30 XR5 AV12 XR12 HS40 K661 M6C XP5 XPH1 XPH8 XR485 XR685 M7 AV685 AV485 AV30B

Avtron's AV25 encoders directly replace a broad range of encoders, including, but not limited to:

BEI H25, XH25

Dynapar: H25, H42, HA525, HA625, HC525, HC625, HR525, HR625

Encoder Products Corporation (EPC) 702, 725

Lakeshore/Northstar: HD25

And many other 2" encoder models.
For direct model replacements, try our cross reference page
or
Contact Us

Accessories

Cables and Connectors

PRODUCT GLOSSARY

A Quad B

A Quad B refers to the set of output quadrature signals from an incremental quadrature encoder to indicate speed and direction, including complements: A, A NOT, B, B NOT (, , , ). Most Avtron encoders offer A Quad B output at no extra cost. For more information on quadrature- Wikipedia: http://en.wikipedia.org/wiki/Quadrature_phase
Complements

Also known as complementary outputs. To ensure that signal noise does not cause errors between the encoder and the controller, many encoders output signals that are driven in exactly opposite directions: when A goes high, A NOT goes low (, ); when A goes low, A NOT goes high. Controllers which see a transition in A, but not in the A NOT signal, would report a quadrature error.
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.
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.
Face or Flange Mount

A machined surface (NEMA 56C, NEMA FC) on the non-drive end of the motor is used to mount bearingless or pancake encoders such as Avtron AV56 THIN-LINE II� encoders. Solid shaft, coupled tachometers also flange mounted using flange adapters, also called flowerpots.
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")
IR LED

Infra-Red Light Emitting Diode is the light source for an optical encoder.
Incremental Encoder

An encoder that produces pulses in proportion to distance moved or rotated. Incremental encoders can also have a marker pulse Z, Z NOT (, ) once per revolution to provide a position reference. Avtron produces a full range of incremental rotary encoders.
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.
Line Driver

The chip or output circuit that forms the electrical pulses output from the encoder. Avtron has extremely advanced line driver technology to prevent damage from overvoltage and short circuits. Avtron offers optional high-power line drivers to permit Avtron encoder signals to travel farther down long wires to remote controller/drive locations without the need for repeaters or amplifiers.
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.
PPR

Pulses Per Revolution. Most Avtron encoders output quadrature pulses, with four times as many lines as pulses. Often lines can be counted in the drive/speed controller for higher resolution applications.
Pulses

Pulses are also known as counts and are the low voltage output transitions which indicate movement of the encoder. Encoders are rated by resolution or PPR (pulses per revolution). Pulses are not the same as lines.
Quadrature

To determine which direction an encoder is revolving, encoders output quadrature signals: two streams of pulses, A & B, generated at 90� timing angles. (Also called A Quad B) A leading B indicates rotation in one direction; B leading A indicates the encoder is rotating in the opposite direction. Example: �A leads B with clockwise rotation as viewed from the encoder face on an HS45 encoder." Many encoders with quadrature outputs also have complementary outputs: A NOT and B NOT signals.
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.
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.
Wide-Gap Technology

Avtron encoders use special optical sensors and magnetoresistive sensors, combined with proprietary circuit designs to allow the sensor to be located much farther from the magnetic rotor or optical disk. This eliminates sensor crashes and makes mounting easy and forgiving of mechanical variation.

Related Products

AV20

AV45

AV4

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Product Details

AV25

Description

Specifications

More Advantages

Markets & Applications

Light Mill Duty

Mill Duty

Heavy Mill Duty

Severe Mill Duty

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