Avtron XPH1 SMARTSafe™ Encoder

Avtron XPH1 SMARTSafe™ Encoder

Explosion Proof Bearingless Encoder

  • Fits NOV TDS 9, 10 & 11 Top Drives Directly
  • No Barrier or Isolator Needed
  • No Intrinsic Safety Ground Required
  • Class I Div 1 Groups C, D Listed
  • AEx Zone 1 Certified
  •  Zone 1 & 2 Certified
  • Fully Protected Against Shorts and Wiring Errors
  • Drives up to 1000 feet [305m] of cable without repeaters
  • 2 Year No-Hassle Warranty
  • -50°C to +85°C Operation
Outline Drawing
Dramatically slash encoder-related downtime on top drive applications!

XPH1 SMARTSafe™ encoders are the world's first explosion-proof encoders with removable electronics and no external barrier!  They are cULus, ATEX, IECEx certified and offer incredibly reliable no-bearing construction!  SMARTSafe XPH1 encoders can be used in ATEX/IECEx, cUL AEX, and UL gas hazardous environments including NEC500 and NEC 505.  

XPH1 comes complete with auto-centering jig, base plate, riser shaft, sensor and rotor to fit NOV TDS9, TDS10, and TDS11.  Also available:  no-bearing modular sensors (XP5), 8.5" C-face XPH8 as well as intrinsically safe models (XR5, XR12, XR56, XR125, XR485, XR685, XR850) and hollow shaft models M6C.

Use the XPH1 directly in your application with no barrier or isolator required with 1000 feet of cable or more!

Unlike the competition, Avtron SMARTSafe encoder systems are protected against short circuits, power-to-output wiring, and output-to-ground faults.  They feature full diagnostics:  it's easy to determine that signal quality is good-just look for the green LED.  Worried about wiring short circuits and errors?  XPH1 will indicate any short circuit conditions with an orange LED and will survive this condition!

No encoder bearing failures, no more sealing problems. Mount XPH1 directly on your motor, build it right into your machine.  So many applications benefit from a more reliable no-bearing encoder.  Vibration, shock, liquids, dust and dirt won't harm SMARTSafe XPH1 encoders!  

Eliminate the biggest cause of hazardous duty encoder failure--eliminate the bearings with XPH1 hazardous duty encoders!
Operating Power: 5-24VDC in/out
    400mA max @ 5V; 200mA max @ 12V; 100mA max @ 24V (plus cable load)
Output Format: A Quad B with marker (A,A–, B,B–, Z,Z–)
Frequency Range: 0 to 250 KHz
PPR: 8-100000
Speed: 6000 RPM Max. (contact factory for higher speeds)
Maximum Cable Length: 1000 ft (305m) (contact factory for longer distances)
Rotor Positioning: Up to +/-0.100" [+/-2.54mm] movement/misalignment
Sensor-Rotor Gap: 0.040", +0.015/-0.030" [1mm+0.38/-0.76]
Temperature: -50°C to 85°C 
    (rotor -50°C to 100°C continuous, +135°C intermittent)
Environmental: IP65 fully potted sensors 
Vibration: 5-2000Hz, 18G; 100G Shock
Weight: 15lbs. [6.8kg]
    Class I Div 1, Groups C and D
    Class I Zone 1, Ex db ia IIB T4 Gb
    Class I Zone 1, AEx db ia IIB T4 Gb
    Ex db ia IIB T4 Gb (ATEX/IECEx)

 *See installation drawings for Warnings and Limitation
**Consult NOV for installation guidelines and details
  • All-digital design, no trim pots or adjustments for longer life
  • Advanced sensor technology
  • Superior line drivers withstand short circuits and reverse voltage wiring errors
  • Fully Potted Electronics
  • SMARTSafe sensors find problems before they cause failure
  • Allows Gland or Conduit Connections
  • Full protection against motor shaft currents
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,

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In This Section

  • Axial Shaft Movement

    Motor shaft movement in or out, relative to the ends of the motor. Often motors that use roller or sleeve bearing construction have more axial shaft movement. Most Avtron modular encoders tolerate +/- 0.050" of axial movement maximum. Use hollow shaft encoders for high axial movement motor styles, such as MD motors. Most competitors’ modular encoders tolerate much less axial movement than Avtron products.

  • 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.

  • 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.

  • 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.

  • Flameproof

    Also known as Explosion Proof, flameproof encoders have additional protection/safety enhancements for use in explosive atmospheres. Flameproof encoders 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 encoders may require the use of additional, external protection/current limiting devices outside of the hazardous area. Avtron offers hollow shaft M6C Flameproof encoders.

  • 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. 

  • 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.

  • Lines

    Encoders produce pulses that create transitions up and down in a DC voltage. Each transition is called a line. Quadrature encoders with their two channels produce four times as many lines as pulses. Some drive products can be set to count lines in one direction (up/down) or all directions, creating more counts in the drive than the rated PPR (pulses per revolution) of the encoder.

  • 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.

  • Magnetoresistive Sensor

    A sensor that detects the magnetic poles on an encoder's magnetic rotor and transforms them into pulses. Avtron magnetoresistive (MR) sensors use advanced technology to reject external magnetic signals such as brake solenoids and motor magnetic fields. MR sensors enable Avtron magnetic encoders to ignore dirt, oil, water, and other contaminants.

  • Marker Pulse

    The Marker Pulse occurs once per revolution. The purpose of the marker pulse is to provide a repeatable home position location for positioning applications. The marker pulse is often abbreviated as "ØZ" or "Z" in the USA and "C" or "N" in Europe.

  • MR

    Magnetoresistive (MR) sensors are used in Avtron encoders to provide high accuracy and superior reliability versus optical sensing systems.  For more information on magnetoresistivity:  Wiki:  http://en.wikipedia.org/wiki/Magnetoresistive

  • 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.

  • Optical Errors

    Optical Errors include false pulses, missed pulses, and quadrature errors that are generated when there is any type of contamination (dirt, oil, water, condensation) on the optical disk.

  • 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.

  • 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.

  • Rotor

    The disk-shaped portion of the modular encoder that is mounted on the motor shaft. Avtron modular encoders use magnetic rotors.

  • 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.

  • Severe Duty

    Severe Duty encoders have the best ability to withstand temperature cycling, extreme temperatures, contaminants, bearing loads and physical abuse.

  • Shaft Current

    The undesirable electrical current flow common to motors controlled by variable speed drives. This current attempts to circulate within the motor or discharge to ground. Avtron encoders are protected against shaft currents.

  • Shaft Runout

    The wobbling motion produced by a shaft that is not perfectly true and straight. Shaft runout is often abbreviated T.I.R. (Total Indicated Runout).

  • 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.

  • Stub Shaft

    The portion of the shaft (often on the non-drive end of the motor) used to mount an encoder. To add an encoder to a motor or other shaft that lacks enough extra shaft length to install the encoder, an additional shaft length is added. The stub shaft is threaded into the center of the motor shaft, or the existing motor shaft is enclosed in a sleeve that grips the shaft. Avtron offers many standard and custom stub shafts.

  • 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.

  • 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.

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