Resolver Excitation Module | Allen-Bradley 1771-HR

The 1771-HR is an Allen-Bradley Resolver Excitation Module designed for 1- to 3-axis motion control applications. It provides resolver excitation and supports position feedback within compatible motion control configurations. The module includes status indicators for monitoring operating conditions and has a specified maximum total power consumption of 10.4 W.

Key Features

• Resolver excitation module for 1- to 3-axis applications.
• Supports resolver-based position feedback.
• Module status indicators for operating condition monitoring.
• Maximum total power consumption of 10.4 W.
• Specified DC current requirements at 5 VDC and 15 VDC.
• Manufacturer-discontinued product.

Technical Specifications

Resolver Excitation and Motion Control

The 1771-HR is designed to provide resolver excitation for motion control systems using resolver-based position feedback. A resolver converts mechanical shaft position into electrical feedback signals, allowing the associated motion controller to determine the position of a motor or mechanical axis.

The 1- to 3-axis designation identifies the intended axis capacity of the module. The actual resolver configuration, feedback connections, and supported controller combinations should be checked against the installed motion control system documentation.

Power Requirements and Monitoring

The module has a specified maximum total power consumption of 10.4 W, with current requirements listed for the 5 VDC and 15 VDC supply rails. These values are relevant when checking the available power capacity of the existing chassis and associated power supply arrangement.

Built-in status indicators provide visual information about module operating conditions. Their individual diagnostic meanings and LED operating sequences are not specified in the supplied product information.

Product Availability and Warranty

The Allen-Bradley 1771-HR is discontinued by the manufacturer. When sourcing this module for an existing installation, verify the complete part number and the required resolver configuration before ordering.

The supplied product listing specifies that the factory warranty does not apply and includes a Radwell 2-year warranty. This warranty is provided by Radwell rather than the original manufacturer.

Frequently Asked Questions

Q: How many axes does the 1771-HR support?

A: The supplied specifications identify the module for 1- to 3-axis applications. Confirm the required axis configuration and system compatibility before replacement.

Q: What are the power requirements of the 1771-HR?

A: The listed current requirements are 500 mA at 5 VDC and 260 mA at 15 VDC, with a maximum total power consumption of 10.4 W.

Q: Is the Allen-Bradley 1771-HR still available from the manufacturer?

A: No. The module is discontinued. The supplied listing includes a Radwell 2-year warranty, while the factory warranty does not apply.