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Absolute Single-turn
Absolute encoders, contrary to the incremental ones, deliver their position even after cut of the supply voltage and do not require mechanical repositionning. Single turn encoders allows the positionning in the revolution (0-360°).
Absolute encoders provide Gray, binary or other specific code upon request.
Three ranges are available: the 58mm POSI+TM the 90mm ROBUSTECHTM, the 200mm MAXXTM.
Absolute Multi-turn
In addition to the position in the revolution, absolute multiturn encoder provides the number turns which have been made, up to 65,536 revolutions (16 bit).
A complete range of multiturn encoder is available with a mechanical or a patented all electronic memorisation of the number of turns. |
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Absolute encoders are devices used to measure lengths or angles and are used as distance gauges in machine tools, in handling and automation technology and on testing units.
Absolute industrial encoders
These output positional information in the form of a numerical value (code). This numerical value is unique across the entire resolution range of the absolute encoder. For this reason no initial reference run is required, as is the case with incremental encoders.
With rotary encoders, a distinction is made between single-turn encoders, which provide a resolution on just a single rotation and then revert to 0, and multi-turn encoders that provide a resolution over several rotations. A further distinction is made between optical and magnetic encoders. |
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The Hollow-Shaft Optical encoders are rugged,
high-performance devices designed for
use where precise motion sensing is critical.
The Series 835H is available in three different models. They have the same mechanical and electrical features,
but differ in performance and price.
The following features are common to all models:
Optional zero index Fits any size shaft up to 1.2"(30mm)
diameter Simpler design of user's shaft: No threads, shoulders,
or critical length requirements Internal flexible fitting
for easier installation Combination synchro/face mount
or square-flange mount Shielded ABEC Class 7 bearings specifications
for protection against contaminants Precise chrome-on-glass disc. |
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PRAS20 Magnetic Angle sensor
Absolute magnetic angle sensor up to 360 degrees in a flat housing
• Non-Contact, external magnet
• Only 6 mm thickness
• 0.5...4.5 V ratiometric
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For spare parts enquiriesplease see our website.
www.tamagawa-seiki.com/english |
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Magnetic angle sensor 0 - 360 degrees in a 36 mm dia. housing
- With 10 mm shaft or 6 mm hollow shaft
- 36 mm dia. housing
- Protection class IP67/IP69K
- Magnetic measurement principle
- Output Voltage 0.5 ... 4.5 V, 0.5 ... 10 V; Current 4 ... 20 mA
- Redundant second channel as option
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Analogue AWS Angle Sensors for harsh industrial environments feature a long service life and simple evaluation options. They are supplied as potentiometers manufacturers or with calibrated voltage or current outputs.
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Absolute Multi-turn
In addition to the position in the revolution, absolute multiturn encoder provides the number turns which have been made, up to 65,536 revolutions (16 bit).
A complete range of multiturn encoder is available with a mechanical or a patented all electronic memorisation of the number of turns.
BLUE RANGE
These encoders have been developed in an objective of rationalization of range and level of unequalled quality. T
hese standard products are available in solid shaft and hollow in connection SSI and the bus ground.
DIAMETRE 90
A range of encoders resistant to the shocks and important vibrations and developed for severe and/or corrosive environments: iron and steel industry, industry of paper, agroalimentary...
Mechanics available in hollow shaft 30 mm and solid shaf.
POSI+TM
New range of compact multiturn encoder with, besides the position, integrated intelligent additional function (speed, electronic limit switches suppliers, incremental channels)
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Absolute coders MT
The multi-turn absolute coders seize the mechanical movement of rotation of a drive on several revolutions.
Absolute coders ST
The absolute coder ST delivers for each angular position a value of coded position single. The value of absolute position is available as of the interlocking of the system. For this reason, a race of reference during the interlocking of the system is superfluous.
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These transducers are shaft industrial encoders which give absolute measurements on more than one revolution of their shaft.
The encoders have a mechanic gear train which transmits the movement of its master disc to a series of slave discs for shaft revolution counting.
An electronic circuit cancels any mechanic backlash of the gear train, thus yielding a detection's.
They are mechanically strong and properly engineered in their electronics, optical and mechanic parts, being thus able to withstand heavy duty conditions.
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Absolute Rotary encoders
Compared to other systems of angle measurement, like inclinometers, rotary encoders provide a comparably high measuring frequency and a constant precision over the full measuring range, which extends beyond 360°.
Resolution Per Revolution up to 16 Bit (65536 Steps)
Up to 16384 (14 bit) Revolutions
Operating Temperature -40 to +85 °C
Environmental Protection IP 65 Enclosure and IP 66 Flange
Hollow Shaft or Solid Shaft Flanges
Stainless Steel and Explosion Proof Encoders Available
UL Certified
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MAGNETOCODE - Absolute Magnetic Rotary encoder
Interface SSI
36.5 mm Diameter
12 Bit Resolution per Revolution
13 Bit Revolutions, Others Upon Request
Operating Temperature -30 to +70 °C
Environmental Protection IP 54
Blind Hollow Shaft or Synchro Flange
Connection: Cable axial
Low-cost, very compact version with cable pull adapter for linear measurement available
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| Absolute encoders have a unique value (voltage, binary count, etc) for each mechanical position. When an absolute encoder is turned on, the position of an absolute encoder is known. |
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AC 58-CANLayer2 (Hollow shaft):
Resolution: Singleturn 10 to 14 Bit, Multiturn up to 26 Bit
Shaft diameter: hub shaft 9.52 mm, 10 mm, 12 mm
Protection class: IP 64 or IP 67
Housing diameter: 58 mm
Supply voltage: DC10 - 30 V
Connection: Bus cover, cable or Conin
RoHS compatible: Yes |
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Utilise a very modern technology; a particular code-reading
method allows to eliminate every mechanic action of gears
to assure a real absolute value of the recording.
Furthermore it permits to choose the code and the
increment directionhaving in basic configuration as gray
code as binary code as up/down discriminate. |
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Singleturn and multiturn encoders with Field bus, SSI, parallel- or analogue interfaces
Technologies:
- Absolute multiturn encoders with mechanical gear or electronic multiturn stage
- Intelligent Sensing Technology (IST)®
- Integrative Technology®
- Safety LockTM Design, OptoASIC Technology
- Latest field bus profile
These characteristics are ideal, for example, in the following applications:
- Trains, buses, construction plant, agricultural vehicles and other mobile equipment
- Movement of materials, storage, transport and storage technology.
- Plant engineering & Construction
- Elevators
- Gears & motors
- Wind power |
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Its outstanding performance figures makes the absolute rotary encoder GEL 235 clearly superior to both conventional encoders and optical systems. Using an innovative technique that reinterprets the familiar vernier principle, the GEL 235 is able to achieve unprecedented precision. This absolute rotary encoder operates wholly reliably even under the most rugged conditions, such as widely fluctuating temperatures and moisture conditions or strong vibration.
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Lika Electronic has successfully developed solutions for the automation industry since 1982. Lika's range includes: ROTACOD, absolute encoders for measurement of linear and angular movement.
Resolution up to 25 bit. Versions with shaft, hollow shaft and low profile are available. |
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Model 600 Series (Robust)
Field bus interfaces based on Ethernet, PROFIBUS or CAN are examples of the communication protocols often used in automation. These interfaces are available on the Model 600 Series absolute coded singleturn or multiturn industrial encoders. A robust mechanical design in shaft or hollow shaft design ensures that installation and start-up of these models are always reduced to a minimum. Serial point-to-point interfaces such as EnDat or the popular SSI are examples of other communication interfaces often used for position feedback from absolute coded encoders.
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Absolute encoders provide a distinctly coded numerical value for each shaft position. In positioning tasks in particular, the absolute industrial encoders relieve the follow-up electronics of computation tasks so that complicated and expensive input components can be dispensed with.
Moreover, reference runs when the machine is switched on or after power failures are no longer required as the current position value is available immediately. Parallel absolute encoders transmit the position value to the analysing electronics parallel through several cables. In case of serial absolute encoders the output data can be transmitted by means of standardised interfaces and standardised protocols.
Whilst in the past frequently point-to-point connections were set up for serial data transmission, field bus systems are being used increasingly today.
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To meet the increasing demand for reliable, low cost, high-speed rotary encoding, Renishaw has introduced a range of OnAxis%u2122 magnetic industrial encoders.
These high-speed rotary magnetic encoders are designed for use in harsh environments, such as marine, medical, print, converting, industrial automation, metal working, motor control, and instrumentation.
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For spare parts enquiriesplease see our website.
www.tamagawa-seiki.com/english |
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Incremental encoders
Solid shaft encoders
Incremental encoders generate a certain number of pulses per revolution. The number of pulses is a measure of the distance moved (angular or linear).
Hollow shaft encoder
Hollow shaft encoders are always used when reduced installation length is required or when precision is important where the drive is subjected to high acceleration.
Absolute encoders
Singleturn
Absolute encoders provide a specific numerical value (code value) for each angular position.
Multiturn
Multiturn encoders not only detect angular positions but also distinguish between several revolutions.
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Absolute encoders
Singleturn/Multiturn-version
Resolution 12/24 bit
Interfaces: Incremental, SSI and Incremental, Three wire synchronous interface
Bus-Interface: PROFI-Bus, CAN-Bus, DeviceNet, Modbus (Ethernert) |
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G0AMH
Technical data - electrical ratings :
Absolute accuracy ±0.025°
Approvals UL Approval / E63076
Code Binary
Code sequence CW/CCW programmable
Consumption w/o load <100 mA (24 VDC)
Diagnostic functions Position or parameter error
Multiturn sensing
Emitted interference DIN EN 61000-6-4
Function Singleturn
Initializing time 250 ms after power on
Interfaces Profibus-DPV0
CANopen
DeviceNet
Interference immunity DIN EN 61000-6-2
Number of turns 65536 / 16 bit
Programmable parameters Steps per turn
Number of turns
Preset
Scaling
Rotating direction
Reverse polarity protection Yes
Status indicator DUO-LED in bus cover
Steps per turn 8192 / 13 bit
Supply voltage range 10...30 VDC
User address Rotary switch in bus cover
Other products available:
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The industrial encoders of the FIELD BUSSES series are absolute Single-turn or Multi-turn rotary shaft encoders with an interface to connect to field bus systems according to the PROFIBUS, INTERBUS, CANopen, DeviceNet or Ethernet standard.
PROFIBUS: PROcess FIELDBUS (in according to EN50170 vol.2 Standard), was one of the first open bus for constructors. DP VERSION is oriented to fast switch of a reduced number of data in automation sector.
CANopen: Controller Area Network; transmission protocol to message oriented. Used in automotive sector.
DeviceNet: field bus similar to CANopen, but much more open and with more restrictive specifications.
InterBus: first open bus realized in the world ( in according to EN50254 and IEC 61158 Standard). It is able to realize real-time functions. |
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SSI
Preset Input
Preset Button and LEDs
Hollow Shaft
Additional Incremental Output
Transfer Distance up to 1,200m |
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Angular encoders, Angular sensors
