AS37-H39B-K22S
AS37-H39B-K22S Datasheet
AS37-H39B-Kxxx
| Part | Datasheet |
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AS37-H39B-K22S |
AS37-H39B-K22S (pdf) |
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AS37-H39B-K12S |
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| AS37-H39B-Kxxx 39 Bits Battery Backup Multi-Turn Absolute Encoder with RS-485 Half-Duplex Output Data Sheet AS37-H39B series encoder is a high-resolution optical absolute encoder produced by Avago Technologies, which offers 23-bits single-turn and 16-bits multi-turn counts, hence a combined 39 bits high resolution. The AS37- H39B series encoder is a house encoder consisting of a patterned disk, a light source, and photosensitive elements to translate the mechanical motion into electrical signal. The Kxxx option of encoders is preloaded with the Avago developed protocol with RS-485 standard compliance with provided CRC and alarm status bits. The RS-485 half-duplex protocol is supported by a half-duplex line transmissions drive RS-485 , offering good noise immunity for more robust transmission of data at Mbps in harsh industrial application. The key advantage of AS37-H39B series is multi-turn tracking that employs battery backup technologies. It is the gearless multi-turn counting that eliminates the gear worn out or acoustics noise issue that is encountered in conventional geared multi-turn encoders. Because the product is intended for industrial application, ESD protection circuitry has been designed by achieving the following ESD compliance IEC-61000-4-2 class Operating Theory Structure-wise, the encoder contains two main functional blocks the single-turn optical engine block and the battery backup multi-turn counter block. The single-turn engine comprises the Avago developed high-performance optical detector ASIC, which is accompanied by high-precision amplifier circuitry, coupled with a special multi-track code disk that rotates between the LED emitter and detector IC. On multi-turn side, the multi-turn counting is enabled utilizing battery backup counter technology. During battery mode encoder operates in main power OFF state , the battery backup circuitry periodically powers up the LED emitter, enabling the photo sensor to scan the code disk multi-turn tracks for detection of shaft rotation. In order to prolong the battery life, extra effort has been put into the design of the ASIC to ensure minimum current consumption during battery mode operation. Therefore, no miscounts occur even in the absence of external power supply. 39-bits resolution 16-bits battery backup multi-turn and 23-bits optical single-turn Alarm features with CRC and alarm status bits Built-in RS-485 half-duplex communication protocol Ø37 mm and typical mounting height 28 mm Supporting 8-mm diameter of the blind hollow and Taper shaft 5K bits of user-accessible memory in E2PROM High resolution with higher measurement accuracy Position detection during power failure with battery buffer Immediate position detection on power up Robotics Factory automation Linear positioning system CNC machine tool Medical and lab equipment Wind turbine NOTE Avago Technologies encoders are not recommended for use in safety critical applications, e.g., ABS braking systems, power steering, life support systems, and critical care medical equipment. Contact a sales representative if more clarification is needed. Broadcom -1- AS37-H39B-Kxxx Data Sheet Mechanical Drawings Option 1 Ø8-mm Hollow Blind Shaft Package Dimensions Mechanical Drawings Recommended Shaft and Mounting Requirement NOTE Dimensions are in millimeters. Third angle projection. Unless otherwise specified, all tolerances are within mm. Recommended to have a recess on motor mounting surface to prevent encoder shaft interfere with motor base. Broadcom -2- AS37-H39B-Kxxx Data Sheet Option 2 Standard Taper Shaft Ø9 to mm 1:10 Package Dimensions Mechanical Drawings Recommended Shaft and Mounting Requirement NOTE Dimensions are in millimeters. Third angle projection. Unless otherwise specified, all tolerances are within mm. Recommended to have a recess on motor mounting surface to prevent encoder shaft interference with motor base. Broadcom -3- AS37-H39B-Kxxx Data Sheet Option 3 Short Taper Shaft Ø9 to mm 1:10 Package Dimensions Mechanical Drawings Recommended Shaft and Mounting Requirement NOTE Dimensions are in millimeters. Third angle projection. Unless otherwise specified, all tolerances are within mm. Recommended to have a recess on motor mounting surface to prevent encoder shaft interference with motor base. Broadcom -4- AS37-H39B-Kxxx Data Sheet Device Selection Guide Ordering Information AS37-H39B- K XXX OD mm Special Feature 06 1/4 inch 12 6mm 13 8mm 21 9 7.5mm 22 9 7.65mm S Standard NOTE Refer to the factory for sample order and lead time. Broadcom - 16 - Connector Information For product information and a complete list of distributors, please go to our web site: Broadcom, the pulse logo, Connecting everything, Avago Technologies, and the A logo are the trademarks of Broadcom in the United States, certain other countries and/or the EU. Copyright 2016 Broadcom. All Rights Reserved. The term "Broadcom" refers to Broadcom Limited and/or its subsidiaries. For more information, please visit Broadcom reserves the right to make changes without further notice to any products or data herein to improve reliability, function, or design. Information furnished by Broadcom is believed to be accurate and reliable. However, Broadcom does not assume any liability arising out of the application or use of this information, nor the application or use of any product or circuit described herein, neither does it convey any license under its patent rights nor the rights of others. pub-005725 June 22, 2016 |
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