Allen-Bradley 1771-HRA Resolver Excitation Module

Precision resolver driver for IMC 120 motion control systems. The 1771-HRA provides accurate position feedback for industrial automation applications.

Key Features

• Resolver excitation signals
• Sine and cosine outputs
• Green LED power indicator
• Low signal distortion
• Compact chassis design
• Reliable performance

Technical Specifications

Brand: Allen-Bradley
Model: 1771-HRA
Module Type: Resolver Excitation
Output Frequency: 2.5 KHz
Output Voltage: 6.72V to 7.42V RMS
Sine-Cosine Match: 0.3% maximum
Signal Distortion: 0.1% THD maximum
Offset Voltage: 0.01V DC maximum
Output Current: 0.35A to 0.81A
Power Supply: 1771-PS7 required
Current Draw: 340mA @ 5.2VDC, 228mA @ 15VDC
Power Consumption: 9.06 Watts maximum
Backplane Power: 0.4 Watts
Startup Delay: 2 seconds maximum
Load Impedance: 80 Ohms maximum
Dimensions: 89 x 165 x 51 mm

Installation Guide

Install in 1771 I/O chassis. Use 1771-PS7 power supply. Connect with 1771-CAPR cable. Check LED indicator.

Shipping & Warranty

12-month performance warranty. Fast delivery via FedEx, UPS, DHL. Secure packaging.

Download Resources

Access complete technical documentation:

• Installation manual
• Wiring diagrams
• Specification sheets
• Troubleshooting guide
• Application notes

Download Complete Technical Manual

Technical Questions

What power supply is required?

Requires 1771-PS7 power supply module for proper operation.

What is the output frequency?

2.5 KHz output frequency for resolver excitation signals.

What systems is this module compatible with?

Designed for use with IMC 120 motion control systems.

What is the startup time?

Maximum 2-second delay from power-up to output signal.

What cables are needed for connection?

Uses 1771-CAPR 12-foot cable for termination panel connection.

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