Omron H8PR-24 Programmable Cam Positioner

The Omron H8PR-24 is a high-performance programmable cam positioner that provides precise angle detection and output switching for rotary machinery applications. This electronic cam switch replaces traditional mechanical cam limit switches, offering superior accuracy, repeatability, and flexibility. The H8PR-24 processes input from a rotary encoder and controls outputs based on programmable ON/OFF angles, enabling precise timing control for presses, indexing tables, packaging equipment, and assembly machines.

Product Specifications

• Model: H8PR-24 Cam Positioner

• Display: 6-digit LED display for angle readout

• Output Type: Transistor output (open-collector)

• Power Supply: 100-240V AC, 50/60 Hz

• Maximum Output Current: 100 mA per output

• Maximum Response Frequency: 5 kHz (0.2 ms response time)

• Adjustable Response Frequencies: 0.5, 1, 2, 3, 4, and 5 kHz

• Encoder Shaft Speed at 5 kHz: 833 rpm

• Operating Temperature: 0°C to 55°C

• Mounting: Panel mount or surface mount

High-Speed Response and Angle Detection

The H8PR-24 delivers exceptional speed with a maximum response frequency of 5 kHz, equivalent to a response time of just 0.2 milliseconds. This high-speed performance enables the cam positioner to track rapidly rotating machinery and provide precise output switching even at high speeds. The adjustable response frequency allows optimization for specific application requirements, with selectable settings of 0.5, 1, 2, 3, 4, or 5 kHz. The cam positioner interfaces with the dedicated E6F-AB3C-C absolute rotary encoder, which provides 360-step (10-bit) resolution for 1-degree angle detection increments.

Programmable Cam Output Control

The cam positioner allows users to program output ON and OFF angles in 1-degree units based on the rotary encoder shaft rotation. This programmable capability eliminates the need for physical cam adjustments, reducing setup time and enabling rapid changeovers between different production configurations. Control outputs can be configured to switch at any desired angle position within the 360-degree rotation. The open-collector transistor outputs provide reliable switching for interfacing with PLC input modules, relays, and other industrial control devices.

6-Digit Display and User Interface

The H8PR-24 features a clear 6-digit LED display that shows the current angle position and parameter settings. The large display provides excellent visibility for operators, even from a distance. Front-panel keys enable programming of ON/OFF angles, selection of output channels, and configuration of operating parameters. The intuitive interface allows operators to modify cam settings without specialized software or programming devices, simplifying changeovers and maintenance.

Memory Backup and Reliability

A built-in battery provides backup for the program memory, ensuring that cam angle settings and configuration parameters are retained during power interruptions. This non-volatile memory backup eliminates the need to reprogram the cam positioner after power cycles, improving operational reliability. The battery-backed memory retains all programmed data for extended periods, protecting against data loss due to unexpected power outages.

Compatibility with E6F-AB3C-C Absolute Encoder

The H8PR-24 is designed for use with the Omron E6F-AB3C-C absolute rotary encoder. This encoder provides 360-step resolution, enabling 1-degree angle detection increments. The absolute encoder provides immediate position information upon power-up without requiring a reference run, reducing startup time and simplifying machine operation. The encoder features robust construction with maximum shaft loading of 10 kgf radial and 3 kgf axial, ensuring reliable operation in demanding industrial environments. The encoder operates at temperatures up to 70°C, accommodating machinery operating in elevated temperature conditions.

Applications in Rotary Machinery

The H8PR-24 cam positioner is widely used in rotary machinery requiring precise angular switching. In press machines, it controls clutch and brake timing, ensuring safe and accurate press cycles. In rotary indexing tables, it provides position verification and output activation for assembly and testing stations. In packaging machinery, it manages sealing jaw timing, film cutting, and product ejection based on angular position. Additional applications include injection molding machines, blow molding equipment, automated assembly systems, and rotary filling machines.

Comparison to Mechanical Cam Switches

The H8PR-24 electronic cam positioner offers significant advantages over traditional mechanical cam switches. Electronic programming eliminates the need for physical cam adjustment, reducing changeover time from hours to minutes. Digital switching provides consistent accuracy without the wear and drift associated with mechanical contacts. The high-speed response of 0.2 ms enables operation at speeds exceeding mechanical cam capabilities. The ability to store multiple cam patterns allows quick changeover between different products, while mechanical cams require physical replacement for each configuration.

Environmental and Mechanical Ratings

The H8PR-24 is designed for reliable operation in industrial control environments. The unit operates within a temperature range of 0°C to 55°C, suitable for control cabinets in manufacturing facilities. The enclosure provides protection appropriate for installation in protected environments. The unit dimensions and mounting hole locations are standardized for panel installation, simplifying integration into existing control systems. The encoder connection uses the E69-C10B connector, providing reliable signal transmission between the encoder and cam positioner.

Low-Cost High-Performance Solution

The H8PR-24 represents a low-cost, high-performance electronic cam switch solution for industrial automation. Its combination of high-speed response, programmable output control, and absolute encoder compatibility provides exceptional value for rotary machinery applications. The built-in display and front-panel programming eliminate the need for external programming devices, reducing overall system cost. The open-collector transistor outputs directly interface with PLC input modules, simplifying integration into existing control systems.

Conclusion

The Omron H8PR-24 programmable cam positioner delivers high-speed angle detection and precise output switching for rotary machinery control. With 5 kHz response, 6-digit display, transistor outputs, and absolute encoder compatibility, it provides a reliable and cost-effective replacement for mechanical cam switches in industrial automation applications.