Brand: Allen Bradley Description: Weigh Scale Module Condition: Brand New Certificate: COO TEST REPORT WARRANTY LETTER Warranty: 1 year Inventory Qty: 4 Payment Term: T/T Shipping Port: Shenzhen Allen Bradley 1771-WS is used to read analog weight values from industrial standard strain gauge load cells and supports data exchange with PLC-5® processors via block transfer. Its core function is to convert load cell signals into digital weight values and enable calibration, monitoring, and control through configuration software or direct communication with PLCs.
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Manufacture |
Allen Bradley |
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Model Number |
1771-WS |
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Ordering Number |
1771-WS |
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Catalog |
- |
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Country Of Origin |
Switzerland |
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HS CODE |
9031809090 |
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Dimension |
12*10*4cm |
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Weight |
0.4kg |
Product Features
Allen Bradley 1771-WS supports 1-8 350Ω strain gauge load cells (external power supply required for 5 or more), and can be directly connected to a single sensor or connected to multiple sensors via a junction box.
Allen Bradley 1771-WS provides gross weight and net weight values, supporting 16-bit integer and 32-bit floating-point format output.
Allen Bradley 1771-WS features a 20-bit A/D converter, providing a display resolution of 985,000 counts within the 0-30mV range (3mV/V sensor).
Allen Bradley 1771-WS incorporates WAVERSAVER® filtering technology, offering five selectable cutoff frequencies (0.25Hz-7.50Hz) to suppress mechanical vibrations and noise.
Allen Bradley 1771-WS can monitor the “Weighing in Motion” status in real-time and determine stability based on user-defined “dynamic tolerance.”
Allen Bradley 1771-WS supports tare and zero functions, which only take effect when weighing is stable to avoid dynamic errors.
Allen Bradley 1771-WS provides weight change rate calculation based on user-defined time units, evaluation cycles, and weight units.
Allen Bradley 1771-WS supports Windows® (NT/95/98/2000) configuration software, enabling visualization configuration via DH+ network or Ethernet (with RSLinx™). It enables bidirectional communication with the PLC-5® processor, exchanging status, configuration, and calibration data via BTR and BTW.
Product Working Principle
Allen Bradley 1771-WS offers three calibration methods:
C2 Calibration: Compatible with Hardy C2® second-generation calibration sensors, automatically uploading sensitivity and resistance values without manual input.
Hard calibration: Uses a known weight (recommended to be 80%-100% of the range), requiring three calibration points low, medium (optional), and high.
Soft calibration: Inputs the sensitivity and resistance values of the load cell (manufacturer data required), reducing reliance on test weights.
Non-volatile flash memory stores calibration values, supporting recovery of calibration parameters from PLC data sheets for easy module replacement.
Product Parameter
The following detail is for Allen Bradley 1771-WS Weigh Scale Module.
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Category |
Detailed Parameters |
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Operating Modes |
Local and Remote |
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Conversion Performance |
Conversion rate: 20 updates per second Averages: 1-200 (user-selectable in single increments) Resolution: Displayed - 1:985,000 (@ 3mV/V), 1:656,000 (@ 2mV/V) Internal - 1:1,048,576 |
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Input Characteristics |
Supports up to 8 350 ohm load cells (5V excitation) Common-mode voltage range ≤ 2.5VDC Common-mode rejection ratio 100dB (at or below 60Hz) |
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Power Requirements |
Backplane input voltage: Maximum 40VDC Backplane current load: Maximum 1.5A@5VDC |
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Environmental Requirements |
Operating temperature range: 0°C to 60°C (32°F to 140°F) Storage temperature range: -20°C to 85°C (-4°F to 185°F) Humidity range: 0-90% (non-condensing) |
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Calibration-related |
Temperature coefficient: Less than 0.005% of full scale per degree C C2 calibration input/output isolation from digital section: Minimum 1000VDC |
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Software Requirements |
Compatible with Windows 95/98/NT/2000 Requires RSLogix™ 5 and RSLinx™ software |
