RELIANCE 607980-71E hollow-shaft incremental rotary encoder
607980-71E is a hollow-shaft incremental rotary encoder designed and manufactured by Baldor-Reliance for closed-loop speed and position feedback matching Reliance DC drives and industrial variable-speed motors. Converting mechanical rotation into quadrature digital pulse signals via internal photoelectric grating components, it feeds real-time rotational speed and position data back to drive control boards for precise motor closed-loop regulation. This original model has been phased out of regular factory production, and available market products mainly consist of unused original surplus stock and professionally calibrated refurbished units for legacy equipment maintenance replacement in heavy industrial production lines such as metallurgy, papermaking and chemical processing.
Description
Product Introduction
607980-71E is a hollow-shaft incremental rotary encoder designed and manufactured by Baldor-Reliance for closed-loop speed and position feedback matching Reliance DC drives and industrial variable-speed motors. Converting mechanical rotation into quadrature digital pulse signals via internal photoelectric grating components, it feeds real-time rotational speed and position data back to drive control boards for precise motor closed-loop regulation. This original model has been phased out of regular factory production, and available market products mainly consist of unused original surplus stock and professionally calibrated refurbished units for legacy equipment maintenance replacement in heavy industrial production lines such as metallurgy, papermaking and chemical processing.
Model Definition
The prefix code 607980 stands for the unified core part number of Reliance dedicated drive feedback encoder product platform. The middle digits 71 define fixed pulse resolution, internal PCB circuit layout and internal wiring specification of this sub-series. Suffix E represents revised mechanical version with optimized hollow shaft dimensional tolerance, upgraded shell anti-shock sealing structure and consistent electrical performance parameters compared with other 71-series base encoders.
Technical Specifications
Standard pulse resolution reaches 1024 pulses per full mechanical rotation. Rated continuous operating rotational speed ranges from 0 RPM to 4500 RPM, with instantaneous peak allowable overspeed up to 5200 RPM. Nominal input supply voltage is 5VDC with ±5% tolerance. Operating ambient temperature covers -20℃ to +75℃, while storage temperature spans from -40℃ to +85℃. Valid working humidity is 5% to 93% non-condensing without corrosive gas environment. The enclosure protection grade is IP54, and internal insulation withstand voltage between core circuit and outer casing is 1200VAC for one-minute dielectric test. It adopts hollow bore mechanical structure for direct coaxial locking installation onto motor output shaft.
Interface and Communication Configuration
The encoder is configured with multi-core shielded outgoing cable terminals for hardwired connection of power supply and A/B/Z three-phase quadrature pulse signals to drive main control unit, without built-in fieldbus communication chip or digital bus interface. A and B phase orthogonal pulses realize forward and reverse rotation identification, and single Z-phase index pulse outputs once per full rotation for mechanical zero-point origin calibration. Fixed mounting holes are reserved on the outer housing for external auxiliary locking installation instead of backplane plug-in docking design.
Core Functions
Coaxially installed on motor rotating shaft, internal photoelectric grating synchronously generates continuous A/B phase orthogonal pulse signals following motor rotation, and Z-phase indexing pulse marks mechanical zero position of each rotating circle. Collected pulse signals are transmitted to drive controller for real-time speed sampling and closed-loop speed adjustment to eliminate rotating speed fluctuation caused by varying load conditions. Built-in internal overvoltage and short-circuit protection circuit automatically cuts off signal output under abnormal power input to prevent permanent damage of internal photoelectric components.
Application Scenarios
Specially customized for matching medium and large-capacity Reliance DC speed governors and supporting variable-speed drive motors. Widely deployed for closed-loop speed feedback of main transmission equipment including auxiliary conveying equipment on metallurgical rolling production lines, roller driving units of papermaking machines, large fan and pump speed regulation systems in chemical plants, as well as spare part replacement and drive system upgrading of old textile printing and dyeing mechanical equipment.
Operation and Maintenance Instructions
Cut off all power supply of matched drive cabinet and confirm complete static status of motor rotating shaft before disassembly or installation work. Fasten hollow shaft locking screw with designated torque to avoid eccentric rotation and abnormal signal distortion caused by inner bore abrasion. Avoid heavy impact on encoder outer casing during installation to prevent fragmentation of internal precision grating components. Conduct annual offline maintenance to inspect insulation aging of shielded connecting cable and dust accumulation on shell surface, and clear surface dirt with dry compressed air. Random disassembly of sealed housing is prohibited, and complete encoder replacement is required once internal photoelectric parts fail after eliminating external wiring faults.
Get a Quote