1771-HRA
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Product Conditions
Product Conditions
Surplus: Surplus units show no signs of installation or having been used previously. These units are in the original packaging, which may have been opened.
Used: Used units have been previously used and are inspected, cleaned and tested.
All units come with a 1 Year Replace Industrial Warranty.
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Product Conditions
Replace Industrial, LLC is not affiliated with any of the manufacturers listed on this website. All products are sourced & verified through the industrial surplus market and through other independent supply chains. We do not convey any manufacturer warranty with the product. Each product sold comes with a 2 Year Replace Industrial Warranty, unless specified otherwise. This warranty conveys solely through Replace Industrial, LLC. and is completely unaffiliated with any manufacturer warranty. The terms of our warranty can be found here.
Surplus: This unit is sourced through the industrial market outside of the manufacturer and has been independently verified to not have been used operationally previously. These units are in the original packaging, but the packaging & unit may show signs of shelf wear.
Used: This unit may have been previously used and show signs of wear. The unit has been independently verified and is guaranteed with a 1 Year Replace Automation Warranty. The unit has been sourced through independent supply chains in the industrial markets.
Firmware: Replace Industrial, LLC sells hardware only and does not sell firmware and makes no representation as to what firmware may or may not be present on the hardware. We do not obtain or provide software for customers.
Allen-Bradley 1771-HRA
The Allen-Bradley 1771-HRA Resolver Excitation Module is engineered for installation in the 1771 I/O chassis and integrates with the IMC 120 system to provide accurate Sine and Cosine output signals for resolver position feedback. Powered by the 1771-PS7 power supply, this module consumes only 0.4 watts on the backplane and includes a green LED to indicate power status. It delivers sine wave outputs with amplitudes ranging from 6.72V to 7.42V RMS, maintaining precise signal characteristics with a maximum amplitude matching error of 0.3%, a sine phase offset of 0.450 degrees, and operates at a frequency of 2.5 kHz for reliable feedback performance.
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number | 1771-HRA |
| Module Type | Resolver Excitation Module |
| Compatible System | IMC 120 |
| Mounting | 1771 I/O Chassis Slot |
| Power Supply | 1771-PS7 |
| Backplane Power Consumption | 0.4 Watts |
| Output Voltage (Sinusoid) | 6.72V to 7.42V RMS |
| Sine-Cosine Amplitude Match | Max 0.3% |
| Sine Phase Offset | 0.450° |
| Signal Frequency | 2.5 kHz |
| Status | Discontinued by Manufacturer |
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