Description
Allen-Bradley 1771-HRA Resolver Excitation Module | Precision Motion Control
The Allen-Bradley 1771-HRA delivers precise resolver excitation for Rockwell Automation’s motion control systems. This specialized module generates high-quality sine and cosine signals essential for accurate position feedback in industrial automation applications requiring precision motion control.
Technical Specifications
- Brand: Allen-Bradley / Rockwell Automation
- Model Number: 1771-HRA
- Product Type: Resolver Excitation Module
- Series Compatibility: PLC-5
- Current Rating: 340mA @ 5.2V DC, 228mA @ 15V DC
- Power Consumption: 9.06W Maximum
- Output Frequency: 2.5 KHz Fixed
- Sinusoid Output Amplitude: 6.72V to 7.42V RMS
- Sine-Cosine Matching: 0.3% Maximum Amplitude Variance
- Total Harmonic Distortion: 0.1% Maximum
- Offset Voltage: 0.01V DC Maximum
- Phase Accuracy: 90° ± 4.5 minutes
- Output Current Range: 0.35A to 0.81A
- Load Impedance: 80 Ohms Maximum
- Response Time: 2μs from Power-up to Output
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C (-40°F to 185°F)
- Humidity Range: 5% to 95% Non-Condensing
- Isolation Voltage: 1500V AC
- Dimensions: 89mm × 165mm × 51mm (3.5″ × 6.5″ × 2.0″)
Power Requirements & Connections
- Requires 1771-PS7 power supply module for operation
- Uses 1771-CAS cable with 12-pin latch and lock connector
- Backplane power consumption limited to 0.4W
- Green LED indicator provides clear power status visibility
- Connects to termination panel via 1771-CAPR 12-foot cable
Installation & Integration
- Mounts directly in 1771 I/O chassis slot
- Compatible with standard wiring arm 1771-WA
- Simple connection to resolver feedback systems
- Clear labeling facilitates correct installation
- No special tools required for mounting
Frequently Asked Questions
- Q: What power supply does the 1771-HRA module require?
A: The module requires the 1771-PS7 power supply for proper operation - Q: Can this module work with different resolver types?
A: The 1771-HRA is designed specifically for IMC 120 System resolvers - Q: What is the maximum output current capability?
A: The module provides between 0.35A and 0.81A output current - Q: How accurate is the phase relationship between outputs?
A: The module maintains 90° ± 4.5 minutes phase accuracy - Q: What cable is needed for termination panel connection?
A: Use the 1771-CAPR 12-foot cable for proper connection
Comparison Products
Explore other Allen-Bradley modules: 1771-IBN Discrete Input Module and 1771-IC Sink Input Module.
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