Avtron XRB3 Intrinsic Safety Isolator

Avtron XRB3 Intrinsic Safety Isolator

Avtron XRB3 Intrinsic Safety Isolator

  • cULus Listed, Class I, Div 1, Groups A, B, C, D
  • cULus Listed, Class I, Zone 0
  • ATEX Rated for Zone 1 and Zone 21
  • IECEx Rated for Zone 1 and Zone 21
  • Up to 1000' [300m] Cable Length
  • Fully Potted Electronics
  • Compatible with All Major Drive Brands and Controllers
  • Protected Against Wiring Errors
  • Designed for Avtron SMARTSafe™ Incremental Encoders
  • 3 Year No-Hassle Warranty

Outline Drawing
XRB3 intrinsic safety isolators are the key to providing complete Level 1 protection including: (cULus Class I, Div 1; Class I, Zone 0, ATEX Zone 1 & 21 "ia"; and IECEx Zone 1 & 21 "ia") for SMARTSafe™ incremental encoders with quadrature output.  

The XRB3 ensures the SMARTSafe encoder system meets hazardous duty UL and CSA, ATEX & IECEx safety standards.  Also available: A full range of SMARTSafe rotary encoders to meet your application needs, including the heavy duty hollow shaft (XR45), shafted models (XR4F, XR485), and no-bearing modular encoders (XR56, XR85, XR115, XR125, XR850), and stand-alone sensors (XR5, XR12).

Unlike the competition, the Avtron SMARTSafe encoder systems including the XRB3 are fully protected against short circuits, power-to-output wiring, and output-to-ground faults at every point.  Wiring errors won't harm this system!  

Competitive intrinsic safety barriers for encoders often limit the available frequency throughput, or have undesirable voltage droop under load that limit cable length severely.  The XRB3 has full throughput for Avtron quadrature encoders even at high PPRs, and the XRB3 allows the use of maximum cable lengths through its innovative stable-voltage design.

Select an Avtron SMARTSafe rotary encoder to eliminate encoder problems, and include the XRB3 as part of the system to meet UL and CSA system safety standards in your hazardous duty application!
Operating Power: 12-24VDC, nom. 200mA (w/SMARTSafe™ encoder); max 440mA
Output Voltage:  12-24V, nom.
Output Format: Incremental A Quad B with marker (A,/A, B,/B, Z,/Z quadrature)
Frequency Range: 0 to 165 KHz
Maximum Cable Length: 
     1000' [300m] XRB3 to control; 
     500' [152m] XRB3 to encoder*
Temperature: -40°C to 80°C (Storage -40°C to 100°C)
Environmental: IP54, cabinet mount
Vibration: 5-2000Hz, 18Gs
Weight: 1.1 lbs. [0.5 kg]

*XRB3 to encoder allowable cable length may be affected by cable characteristics and gas group application.

     Associated apparatus for installation in Unclassified locations.
     Provides intrinsically safe circuits for use in metals, marine, and oil & gas applications
     cULus Class I, Division 1 Listed, (Gas) Groups A, B, C, D
     cULus Class I, Zone 0, Group IIC Listed [AEx ia Ga] IIC
     ATEX/IECEx, Zone 1, Group IIC [Ex ia IIC Gb] [Ex ia IIC Db]
  • Withstands direct short circuits in both safe zone and output connections
Industry General Food & Beverage Pulp & Paper Wood Products Wind Power Crane & Hoist Metals Mining Marine Oil & Gas

Light Mill Duty

AV20, AV25, AV4, AV6A, AV6M, Avtron Elevator Encoder, Cables and Connectors, Encoder Couplings, Encoder Programming Tool, HS25A, HS35A, HS4, HS6A, K661, Rush AV4 Program, 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,
The XRB3 allows the replacement of competitive encoder systems including:

Baumer Hubner:
EEx HOG 161, HOG8, HOG9, HOG10, HOG11, HOG131, HOG161, HOG163, HOG165 encoders

HS35, HS35F, H37, H38, H40, L25 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

BEI Ideacod encoders:

Dynapar encoders:
X25 encoder

NorthStar Encoders
EN42, EN44

RSI 58X-,RVI 58X-, RVI84, 14-1436X, 14-14361, 14-14366

And many other hazardous area, intrinsically safe and explosion proof ATEX, IECEx, UL, and cUL rated encoders and systems.
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In This Section

  • 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.

  • 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.

  • IECEx

    IECEx is a directive used worldwide for equipment, including encoders, to be used around or in explosive atmospheres. IECEx certified equipment is NOT necessarily interchangeable with US-based UL Class/Division rated equipment, or ATEX rated equipment. IECEx is an alternative and different system. Avtron offers a full famliy of Explosion Protected, IECEx certified XR encoders, and M6C is also IECEx certified.

  • 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.

  • 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. 

  • UL Listed

    UL Listed Avtron encoders can be directly applied to any hazardous duty application which requires Class and Division, Class and Zone or AEX certification.  Note that UL Listing is a different system than ATEX or IECEx.  Ensure the model you select has the UL listing which meets the application requirements.

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