Agilent AEAS-72AC-xxxxB Absolute Encoder Data Sheet Features • Gray or binary code options • High or low power source options • IP 65 rating • 50 mm package diameter • 8 bits and 10 bits resolution • 8 mm shaft diameter • The package comes with 2 m long cable Description The AEAS-72AC-xxxxB absolute encoder is a feedback device that has the capability to generate a unique binary ‘word’ for each encoder shaft position. The AEAS72AC-xxxxB also has the unique feature of being able to provide positional information upon power up without the need for codewheel movement, unlike incremental encoders, which need codewheel movement to provide positional information. Each absolute encoder from the AEAS-72AC-xxxxB consists of a lensed LED (Light Emitting Diode) source, an integrated circuit with detectors and output circuitry, and a special multi-track glass codewheel that rotates between the emitter and detector IC. These 3 main components are contained within a strong metal housing fitted with bearings to produce an IP rated encoder capable of working in very wet and dusty conditions. Models with IP65 ratings have sealed bearings. Applications • Tool changers and axis control for machine tools • Robotics • Telescopes and antennas • Rotary and X - Y positioning tables • Medical scanners Package Dimensions 15 ± 0.3 7 ± 0.2 5 ± 0.1 35 13 ± 0.2 MODEL NAME PLATE 10 ± 0.2 40 MAX. ∅50 ± 0.2 ∅30h7 ∅8h7 A 12 1° 0 °± ± 1° 0° 12 A 3-M4 DEPTH 5 P.C.D40 10 20 ZERO ADDRESS POSITION TOLERANCE ± 5° 20 TOLERANCE IS ± 0.5 mm UNLESS OTHERWISE SPECIFIED. TYPICAL DIMENSIONS IN MILLIMETERS. JIS (JAPANESE INDUSTRIAL STANDARD) DEFINITION (mm) +0 -0.025 +0 8 -0.015 30h7 30 8h7 NOTE: INFORMATION FROM JIS B0401(1999) ABSOLUTE ENCODER PART No: AEAS-72AC-XXXAB SERIAL No: XX-XXX MADE IN JAPAN CONNECTIONS BLU RED +*~*V BLK 0V.COM VLT BRN 20 GRA ORN 21 WHT YEL 22 SHIELD GRN 23 8 BIT SPEC 2 24 25 26 27 FG ABSOLUTE ENCODER PART No: AEAS-72AC-XXXBB SERIAL No: XX-XXX MADE IN JAPAN CONNECTIONS BLU RED +*~*V BLK 0V.COM VLT BRN 20 GRA ORN 21 WHT YEL 22 PNK GRN 23 SKY SHIELD 10 BIT SPEC 24 25 26 27 28 29 FG Theory of Operation The AEAS-72AC-xxxxB is a singleturn, low-cost, and compact absolute encoder which uses optical technology to provide absolute positioning information. The AEAS-72AC-xxxxB consists of a LED, Fixed Slit, Codewheel (Rotating Disc) and Photodiode IC. By using these four main components, the AEAS-72AC-xxxxB is able to produce signals in either binary or gray output form. These signals provide to the designer a unique code for each position that the codewheel is in. As seen in the diagram, the encoder contains a single Light Emitting Diode (LED) as its light source. The light is collimated into a parallel beam by means of a lens which is built into the LED housing. This parallel beam goes through the Fixed Slit that creates a certain light pattern, due to its pattern of slots, which will fall onto the code-wheel. The movement of the code-wheel between LED and Photo detector, causes the light pattern (from the Fixed Slit) to be further interrupted by the pattern of spaces and bars on the codewheel. This final light pattern from the codewheel is then detected by the Photodiode IC where its signals are fed through signal processing circuitry to produce 8 or 10 parallel signals in binary or gray output form. FIXED SLIT LED PHOTODIODE IC CODEWHEEL SHAFT 3 Absolute Maximum Ratings Storage Temperature –30°C to 85°C Operating Temperature –10°C to 60°C Supply Voltage DC4.5 V to 13.2 V (for output mode = V) DC4.5 V to 13.2 V; DC10.8 V to 26.4 V (for output mode = C) DC10.8 V to 26.4 V (for output mode = P) (note: VCC ripple at 3% p-p max.) Humidity RH85% Degree of Protection (IP65): Totally protected against dust and protected against low-pressure jets of water from all directions; limited ingress permitted. Shock 980 m/s2 with 11ms at X, Y, Z directions Electrical Characteristics (over recommended operating conditions. Typically at 25°C) Parameter Symbol Maximum Units Current Consumption (without load) ICC 100m (max.) A High Level Output Voltage VOH VCC– 1 V (for output mode = V) V Low Level Output Voltage VOL 0.5 or less (for output mode V, C) V Rise Time tr 2 µs Fall Time tf 2 µs Response Frequency f 10K (for 8 bit resolution) 20K (for 10 bit resolution) Hz ± 0.700° (max. for 8 bit resolution) ± 0.175° (max. for 10 bit resolution) deg Angular Accuracy Mechanical Ratings Parameter Maximum Units Starting Torque 9.8 × 10 –3 (max. at 25°C) Nm Angular Acceleration Shaft Loading 1 × 105 rad/s2 Axial Thrust 49 N Radial 78.4 N Moment of Inertia 30 g.cm2 Speed 5000 RPM Net-Weight (without cable) 250 g Vibration (in X, Y, Z directions for 2 hrs.) 10 to 55 Hz/1.5 mm (p-p) 4 Electrical Interface VOLTAGE OUTPUT OPEN COLLECTOR OUTPUT OUTPUT MODE OUTPUT MODE V VCC C VCC 2 KΩ SIGNAL SIGNAL 0V 0V PNP OPEN COLLECTOR OUTPUT OUTPUT MODE P VCC SIGNAL 0V 5 Output Waveforms Definition Signals are extracted by rotating the shaft in clockwise direction as viewed from arrow angle. H The example signals shown are gray code output. 20 L H 21 L H 22 L H 23 L H 24 L H 25 L H 26 L H 27 L 0 6 1 2 3 4 5 6 7 8 9 10 Electrical Connections Color of Lead Wire Description Red Power Source Black 0 V Common Brown Signal 20 Orange Signal 21 Yellow Signal 22 Green Signal 23 Blue Signal 24 Purple Signal 25 Gray Signal 26 White Signal 27 Pink Signal 28 Only available for 1024 split type Sky Blue Signal 29 Only available for 1024 split type Shielding Braid FG Ordering Information AEAS-72AC- Power Source L = 5 to 12 V H = 12 to 24 V B Output Code G = Gray Code Negative Logic A = Binary Code Negative Logic Part Numbers Currently Available: AEAS-72AC-HACAB AEAS-72AC-HACBB AEAS-72AC-HGCAB AEAS-72AC-HGCBB AEAS-72AC-HGPAB AEAS-72AC-HGPBB AEAS-72AC-LACAB AEAS-72AC-LACBB AEAS-72AC-LAVAB AEAS-72AC-LAVBB AEAS-72AC-LGCAB AEAS-72AC-LGCBB AEAS-72AC-LGVAB AEAS-72AC-LGVBB Note: Please contact your local Agilent sales representative for other options. 7 Output Mode C = Open Collector P = PNP Open Collector, only available for option H of power source (12 to 24 V) V = Voltage Out, only available for option L of power source (5 to 12 V) Resolution A = 8 bits B = 10 bits www.agilent.com/semiconductors For product information and a complete list of distributors, please go to our web site. For technical assistance call: Americas/Canada: +1 (800) 235-0312 or (408) 654-8675 Europe: +49 (0) 6441 92460 China: 10800 650 0017 Hong Kong: (+65) 6271 2451 India, Australia, New Zealand: (+65) 6271 2394 Japan: (+81 3) 3335-8152(Domestic/International), or 0120-61-1280(Domestic Only) Korea: (+65) 6271 2194 Malaysia, Singapore: (+65) 6271 2054 Taiwan: (+65) 6271 2654 Data subject to change. Copyright © 2003 Agilent Technologies, Inc. Obsoletes 5988-8181EN February 10, 2003 5988-8670EN