Product Details

XR85A

Revolutionary No Bearing Design

Fits NEMA 8.5" Flanges for ABB, Baldor, GE, Marathon Blue Max, Reliance & Reuland Motors
ATEX/IECEx Rated for Zone 1, 2, 21 & 22 Applications
Ideal for Oil and Gas Applications
No Bearings to Wear Out
Fully Potted Electronics
Up to 5000 PPR
Wide Sensor-Rotor Gap: No Shimming or Scraping
Protected Against Wiring Errors
Self-Diagnostic LED and Alarm Output
3 Year No-Hassle Warranty
cULus Class I Division 1 Groups A,B,C,D Listed
cULus Class I Zone 0 Group IIC
cULus Class I Division 2 Groups A,B,C,D Listed

CONFIGURE & PRICE ENCODER

Product Manual

Data sheet

Accessories

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Description

XR85A SMARTSafe 8.5" modular rotary incremental quadrature encoders are a breakthrough in hazardous duty encoders. They are ATEX and UL approved and offer incredibly reliable no-bearing construction! SMARTSafe encoders can be used in gas and ATEX dust hazardous environments. Also available: hollow shaft models (XR45, XR685), shafted models (XR4F, XR485), and no-bearing modular encoders to fit other flange sizes (XR56A, XR115, XR125, XR850).

For applications requiring ATEX/IECEx Zone 2 or 22 or UL Class I, Division 2, Groups A,B,C,D use the XR85A directly in your application, with no barrier, isolator or cable gland required.

For applications requiring UL Division 1, ATEX/IECEx Zone 1 or 21, protection use the XRB3 isolator in your control cabinet which permits the use of intrinsically safe wiring instead of explosion-proof conduit or glands. The XR85 can also be used in UL Class I Div 1 & Zone 0 applications using the XRB3 Isolator.

Unlike the competition, Avtron SMARTSafe encoder systems are protected against short circuits, power-to-output wiring, and output-to-ground faults.

Instead of relying on a tiny optical encoder with weak bearings, install the most rugged encoders available for your drilling or industrial applications. Vibration, shock, liquids, dust and dirt won't harm SMARTSafe encoders! Paint booths, draw works, coil tubing rigs...XR85A can keep them all working 24/7/365.

Eliminate the biggest cause of industrial encoder failure--eliminate the bearings with XR85A hazardous duty encoders!

Specifications

Operating Power: (add load and cable drive current as req'd)

Division 1, Zone 1 (XRB3): 12-24VDC In/Out, 150 mA

Division 2, Zone 2: 5-24VDC In/Out, 150mA

Output Format: A Quad B with marker (A, /A, B, /B, Z, /Z)

Frequency Range: 0 to 165 kHz

Maximum Cable Length:

Division 1, Zone 1: Encoder 500' Isolator 1000'

Division 2, Zone 2 (5 to 12 VDC in): 500'

Division 2, Zone 2 (15 to 24 VDC in): 250'

Temperature: -40°C to 80°C (storage -40°C to 100°C)

Environmental: IP54 (see manual for details)

Vibration: 5-2000Hz, 20G, 100G Shock

Weight: 2-3lbs [.9-1.4kg]

Certifications:

ATEX/IECEx Zone 1 & 21 Group IIC

cULus Class I Div 1 and Zone 0 Group A,B,C,D*

ATEX/IECEx Zone 2 & 22 Group IIC

cULus Class I Div. 2 Groups A,B,C,D

*See installation drawings for Warnings and Limitations.

More Advantages

Replaces BEI H38 and Dynapar X25 explosion-proof encoders
Eliminates large & costly flange adapters & flowerpots
Fits shafts 0.500" - 3.188" [10 - 85 mm]
Thin profile reduces overall motor depth
No air gap adjustment required
Shrugs off dirt, oil, and water contamination
No glass disks to break or optics to fail
4,500,000+ hour MTBF design

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

XR85 SMARTSafe encoders can replace many competitive models including:

BEI:
HS35, H37, H38, H40, L25 explosion proof and intrinsically safe encoders
924-08062-001, 924-08062-002, 924-08062-003, 924-08063-001, 924-08063-002, 924-08064-001, 924-08064-002, 924-08172-001, 924-08172-002, 924-08173-001, 924-08173-002, 924-08174-001, 924-08174-002, EM-DR1-IS-5-RTB-24V/V, EM-DR1-IS-5-RTB-24V/4, EM-DR1-IS-5-RTB-24V/OC intrinsic safety barriers & systems

Dynapar encoders:
X25 encoder

And many other hazardous area, intrinsically safe and explosion-proof ATEX rated encoders.

Accessories

Cables and Connectors

PRODUCT GLOSSARY

ATEX

ATEX is a directive used worldwide for equipment, including encoders, to be used around or in explosive atmospheres. ATEX certified equipment is NOT necessarily interchangeable with US-based UL Class/Division or Class/Zone rated equipment, nor IECEx rated equipment. ATEX is an alternative and different system. Review our full line of Avtron Explosion Protected, ATEX certified encoders, including M6, M6C and XR models.
C-Face

A machined flange or elevated/recessed face provided on motors for mounting accessories. Typically provided on the drive end for gearbox/load mounting, C-faces may also be provided on the non-drive end for mounting encoders, brakes, and other accessories.
Cam Screw Rotor�

A Cam Screw Rotor eliminates the problems associated with slipping rotors of other types; it uses two cam (eccentric) head screws. The screws are preloaded into the rotor; simply rotate them (approximately 90�-180�) to fully engage the shaft (4-6 ft-lbs) using a standard hex (Allen) wrench. Cam screw rotors are available on AV850, AV56, AV67, AV85, and AV115 THIN-LINE II� encoders. Cam Screw Rotor Patent # 7,485,997. Cam Screw Rotor� is a trademark of Avtron.
Contamination

Also known as contaminants, such as water, dirt, dust, oil, and other compounds which enter an encoder through seal failure and can cause optical errors. If the contamination is abrasive, it can also cause bearing failures in the encoder. Modular encoders are very resistant to contamination as they use magnetoresistive sensors and have no bearings.
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.
Explosion Protected

Also known as Flameproof, explosion protected equipment has additional protection/safety enhancements for use in explosive atmospheres. Explosion Protected devices maybe placed directly into hazardous areas within their nameplate rating. No additional equipment is required if installation instructions are followed properly. By comparison, Intrinsically Safe devices may require the use of additional, external protection/current limiting devices outside of the hazardous area. Avtron offers hollow shaft M6C Explosion Protected encoders.
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")
Flowerpot

A term for the flange adapter used to mount a solid shaft encoder to a motor face.
Heavy Mill Duty

Heavy Mill Duty encoders are designed to withstand temperature cycling, extreme temperatures, contaminants, bearing loads, and physical force.
Intrinsically Safe / Intrinsic Safety

Is a system designed to improve equipment safety by limiting spark energy values in equipment used in hazardous areas. Intrinsic Safety is a different system of protection than Explosion Proof or Flameproof. Many Explosion Proof and Flameproof encoders can be replaced with Intrinsically Safe encoders, provided the installation instructions are followed correctly and the system is compliant with the approved installation drawing. Intrinsically safe Avtron XR encoders are available in Level 1 protection and Level 2 protection.
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.
Modular Encoders

Modular Encoders mount to a machined C-face or flange adapter on the motor (drive or non-drive end). Modular encoders consist of a rotor that mounts on the shaft, and a stator that bolts to the motor frame. Modular encoders are very rugged, and Avtron encoders feature Wide-Gap sensors to avoid complex shimming or fitting to the motor. Modular C-face encoders are typically used on DC motors; but some AC motors, such as Rockwell�s RPM III AC and Marathon�s Blue and Black Max motors, have C-faces standard on the non-drive end for mounting an 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.
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.
Sensor Crash

When the rotating disk in an encoder contacts the sensor (optical or magnetic/magnetoresistive), it damages or destroys the sensor. Sensor crashes can be caused by excessive vibration, shaft runout, or alignment problems in encoder mounting. Avtron encoders feature Wide-Gap technology to eliminate sensor crashes.
Shimming

Often, to produce precise stub shaft, modular encoder, or foot mount installation, shims are placed between the two items to be aligned. Avtron encoders are designed to eliminate the need for shimming. Many competitors� modular encoders still require shimming for proper operation.
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

XR45

XR4F

XR56A

XR850

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Product Details

XR85A

Description

Specifications

More Advantages

Markets & Applications

Light Mill Duty

Mill Duty

Heavy Mill Duty

Severe Mill Duty

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