Encoders
56Pages

Encoders Contents General Information Quick Selection Guide . . . . . . . . . . . . . . . . . . . . . . . page 6--2 Electrical Interface Guide . . . . . . . . . . . . . . . . . . . . page 6--4 Technical Definitions and Terminology . . . . . . . . . page 6--5 Absolute Encoders Bulletin 842A Multi-Turn Magnetic . . . . . . . . . . . . . page 6--7 Bulletin 842D DeviceNett Magnetic . . . . . . . . . page 10--16 Bulletin 842HR Sine Cosine/Serial . . . . . . . . . . . page 6--10 Bulletin 845D Single-Turn . . . . . . . . . . . . . . . . . . . page 6--14 Bulletin 845G Single-Turn . . . . . . . . . . . . . . . . . . . page 6--18 Bulletin 845GM Single-Turn . . . . . . . . . . . . . . . . . page 6--23 Incremental Optical Encoders Bulletin 844A & 844B Hollow Shaft . . . . . . . . . . . page 6--28 Bulletin 844D Hollow Shaft . . . . . . . . . . . . . . . . . . page 6--31 Bulletin 845F with Integral Coupler . . . . . . . . . . . page 6--34 Bulletin 845H Size 25 . . . . . . . . . . . . . . . . . . . . . . page 6--37 Bulletin 845T Size 20 . . . . . . . . . . . . . . . . . . . . . . . page 6--41 Digital Tachometer Bulletin 845PY (5PY Mounting) . . . . . . . . . . . . . . page 6--44 Accessories Serial Parallel Adaptor . . . . . . . . . . . . . . . . . . . . . . page 6--46 SPA Card Holder . . . . . . . . . . . . . . . . . . . . . . . . . . page 6--46 Flexible Couplings . . . . . . . . . . . . . . . . . . . . . . . . . page 6--47 Measuring Wheels . . . . . . . . . . . . . . . . . . . . . . . . . page 6--48 Servo Clamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6--48 Pre-Wired Cable Assemblies . . . . . . . . . . . . . . . . page 6--49 Mating Connectors . . . . . . . . . . . . . . . . . . . . . . . . . page 6--52 Mounting Plates . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6--52 Differential Encoder Buffer Board . . . . . . . . . . . . page 6--55 Indexes Cat. No. Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 13--1 Comprehensive Product Index . . . . . . . . . . . . . . . page 14--1 Visit our website: www.ab.com/catalogs. 6-1

Quick Selection Guide Visit our website: www.ab.com/catalogs.

Quick Selection Guide Buffer Board Serial Parallel Servo Clamps Mounting Plates Additional Info Visit our website: www.ab.com/catalogs.

I/O to Encoder Selection Guide To use this selection guide, scan down the column of the input card or device being used, then look in the column to the right for typical encoders that could be used in the application. The asterisk (*) is used to represent one character in the catalog number. Complete the encoder catalog number by referring to the appropriate pages in the catalog. Some absolute encoders typically require an output module to send a latching signal. Incremental Encoders Absolute Encoders these Input Devices: Input Devices: None Required None Required None Required None...

Technical Definitions and Terminology 5PY: A type of analog DC tachometer with a specific bolt pattern. Angular Acceleration: The rate of change of angular velocity usually expressed in radians per second Angular Misalignment: The maximum amount of angle between the coupled Axial: The direction parallel to the encoder shaft. Axial Compliance: The maximum amount of machine shaft end play. Axial Load: The maximum amount of force that may be applied to an encoder shaft in a direction parallel to the shaft. Blind Shaft: A hollow shaft encoder which is covered on one end so that the accepted...

Technical Definitions and Terminology Push-Pull: A type of single-ended output driver capable of sinking and sourcing current. Also known as Quadrature: Separation in phase by 90°. Used on incremental encoders to denote the direction of motion. Radial: The direction perpendicular to Radial Load: The maximum amount of force that may be applied to an encoder shaft in a perpendicular direction, Radial Play: The amount of shaft radial movement with specified radial load. Radian: An arc in any circle, equal in length to the radius of the same circle. smallest change of input that the Running...

Bulletin 842A Absolute Multi-Turn Magnetic Encoders Synchronous Serial Interface | CE Marked for all applicable directives. multi-turn shaft encoder. It can provide up to maximum of 8192 pulses per turn outputs to reduce cable costs. Interface Absolute Encoder Module converts SSI to parallel data quad B data to interface with 1394 GMC/GMC Turbo and S Class Compact motion controllers (see • SLC input module AMCI 7561 which inputs SSI data directly into the module (see Encompass partner Synchronous Serial Interface or SSI provides many advantages over traditional parallel wiring. SSI provides...

Bulletin 842A Absolute Multi-Turn Magnetic Encoders Synchronous Serial Interface Product Selection Electrical Connections connector. Order the mating connector Typical Application Adaptor Board Servo Clamp Cable Assembly Visit our website: www.ab.com/catalogs.

Encoders Bulletin 842A Absolute Multi-Turn Magnetic Encoders Synchronous Serial Interface Approximate Dimensions [mm (in.)] 60 (2.36) 3 (0.12) 42±0.1 (1.65) 3 (0.12) 4 (0.16) ∅58 (2.28) ∅59.5 (2.34) 34 (1.34) 13 (0.51) Covered Reset Button 51.5 (2.03) ∅24 (0.94) 49.94/49.98 (1.966/1.967) 13.5 (0.53) 5.98/5.99 (0.235/0.236) M4 3 Plcs 7 (0.28) deep 24 (0.94) 27.8 (1.09) 9.0/11.0 (0.35/0.43) 66 (2.60) 120_ Typ 25_ Bulletin 842A-56** 60 (2.36) 48±0.1 (1.89) 3 (0.12) 3 (0.12) 34 (1.34) 9.98/9.99 (0.392/0.393) ∅59.5 (2.34) 13 (0.51) 35.94/35.98 (1.415/1.416) ∅53.8 (2.12) ∅24 (0.94) 13.5 (0.53)...

Bulletin 842HR Sine Cosine/Serial Encoders Size 25, High Resolution Auxiliary Servo Feedback cosine encoder. Targeted for high performance digital servo drive systems that require absolute feedback for position control and high resolution incremental feedback for speed control. Rockwell Automation sine cosine high performance encoders provide commutation, speed regulation and position control all in one device. Absolute position values of up to 15 bit combined with incremental resolution up to 2 million counts per turn. • Absolute feedback for position • High resolution Incremental feedback...