Description
Description
The Allen-Bradley 1769-WS is a high-precision, single-channel weighing module developed by Hardy Process Solutions for integration with Rockwell Automation CompactLogix and MicroLogix 1500 controller platforms. This module enables the direct acquisition of weight, mass, and rate-of-flow data into the PLC backplane, eliminating the requirement for external weighing terminals or complex analog-to-digital signal converters.
Features
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WAVERSAVER Technology: Proprietary signal processing that filters out mechanical vibration interference (above 0.25 Hz) from mixers, motors, or industrial machinery to ensure stable weight readings.
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C2 Electronic Calibration: Supports electronic calibration, allowing for system setup and verification without the need for physical test weights.
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High Resolution: Features 24-bit internal resolution for precise weight measurement.
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Direct Backplane Integration: Seamlessly communicates with the controller backplane for streamlined data processing.
Applications
This module is ideal for industrial weighing applications including batching, filling, dispensing, and inventory management in environments where mechanical vibration would otherwise compromise measurement accuracy.
Technical Specifications
| Model |
1769-WS (Hardy HI 1769-WS) |
| Channels |
1 |
| Load Cell Support |
Up to four 350-Ohm load cells |
| Excitation Voltage |
5 VDC |
| Input Signal Range |
-0.3 mV to +15.3 mV |
| Internal Resolution |
24-bit (1:8,388,608) |
| Conversion Rate |
100 updates per second |
| Common Mode Rejection |
100 dB at 60 Hz or less |
| Backplane Current Draw |
< 0.5 A at 5 VDC |
| Operating Temperature |
0 to 60 degC (32 to 140 degF) |
Installation Guidelines
- Ensure the PLC system power is disconnected before installing or removing the module from the 1769 I/O rack.
- Use shielded, twisted-pair cabling for load cell connections to minimize electromagnetic interference (EMI).
- Maintain proper grounding practices for the 1769-WS module to ensure signal integrity and protection against electrical noise.
- Verify that the load cell cable length is kept to a minimum and routed away from high-voltage power lines.
- Ensure adequate ventilation in the control cabinet to maintain the operating temperature within the specified 0 to 60 degC range.
FAQ
Does this module require physical test weights for calibration?
No, the 1769-WS supports C2 electronic calibration, which allows you to calibrate the scale system without the need for physical test weights, though traditional calibration methods remain supported if preferred.
Can this module be used with any PLC?
The 1769-WS is specifically designed for the Allen-Bradley CompactLogix and MicroLogix 1500 platforms and is intended for use within the 1769 I/O backplane architecture.
