The Allen-Bradley 1769-WS is a specialized single-channel weigh scale module manufactured by Hardy Instruments for the CompactLogix™ and MicroLogix™ 1500 platforms. This module acts as a direct interface between industrial load cells and the PLC backplane, eliminating the need for external weight transmitters. It is designed for high-precision applications such as batching, filling, and tank inventory management, providing digitized weight data directly to the controller’s integer and floating-point registers.
Technical Specifications
Manufacturer:Allen-Bradley / Hardy Instruments
Product Line:CompactLogix / MicroLogix 1500
Model / SKU:1769-WS
Part Number:IN30502
Module Type:Single-Channel Weigh Scale Module
Load Cell Support:Up to four (4) 350-ohm load cells per module
Excitation Voltage:5V DC
Resolution:20-bit A/D conversion
Update Rate:100 updates per second (minimum)
Calibration Methods:Electronic (C2®), Traditional (Hard Calibration), or Soft Calibration
Weight:0.5 kg (1.1 lbs)
Series:1769 Compact I/O
Warranty:1-3 Years (Varies by supplier configuration)
Key Features
C2® Electronic Calibration:Supports Hardy’s patented C2® technology, which allows for automatic calibration of the scale system without the need for physical test weights, significantly reducing maintenance time.
WAVERSAVER® Technology:Includes advanced filtering to eliminate the effects of plant vibration (from mixers, motors, or traffic) on the weight signal, ensuring stable and accurate readings in noisy environments.
High-Resolution Accuracy:With 20-bit internal resolution, the module can detect minute changes in weight, making it ideal for high-value chemical or food batching.
Direct Backplane Integration:Data is mapped directly into the PLC I/O image, providing faster response times than serial or networked weight controllers.
Diagnostic Capabilities:Features integrated "THE BUTTON" technology for quick hardware health checks and load cell continuity monitoring.
