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Description

The Allen-Bradley 1746-WS is a high-precision weigh scale module designed for the SLC 500 controller platform. It serves as a direct interface between the PLC and industrial load cells, eliminating the need for external weight transmitters. This module is ideal for industrial weighing applications such as tank/vessel weighing, hopper scales, and platform scales where high accuracy and reliability are required.

Features

  • Supports up to eight (8) full Wheatstone bridge, strain gauge load sensors on a single vessel.
  • Provides a stable 5V DC excitation voltage to the load cells.
  • Processes millivolt signals into accurate weight data for the SLC processor.
  • Conversion rate of 20 updates per second for responsive weight monitoring.
  • Includes two standard digital TTL level outputs for process control.
  • Integrated common-mode rejection of 110 dB (at or below 60 Hz).

Applications

  • Tank and vessel level monitoring.
  • Hopper and silo weighing systems.
  • Industrial platform scales.
  • Batching and blending process control.

Technical Specifications

Brand Allen-Bradley
Product Line SLC 500
Module Type Weigh Scale Module
Number of Channels 2
Backplane Current Draw 0.25 Amps (250 mA) @ 5V DC
Load Cell Excitation 5V DC
Load Cell Rating 350 Ohms
Accuracy +/- 2%
Common-Mode Rejection 110 dB (at or below 60 Hz)
Conversion Rate 20 updates per second
Output Type 2 x TTL level digital outputs

Installation Guidelines

  • Ensure the SLC 500 rack power is disconnected before installing or removing the module.
  • Mount the module in a standard SLC 500 I/O chassis slot.
  • Use shielded twisted-pair cabling for load cell connections to minimize EMI interference.
  • Maintain proper grounding practices for the chassis to ensure signal integrity.
  • Verify that the load cell impedance matches the 350 Ohm specification for optimal performance.
  • Ensure adequate ventilation within the enclosure to maintain operating temperature limits.

FAQ

What is the primary function of the 1746-WS module?

The 1746-WS is designed to interface directly with strain gauge load cells, converting raw millivolt signals into digital weight data for processing by an Allen-Bradley SLC 500 controller.

How many load cells can this module support?

The module is capable of supporting up to eight (8) full Wheatstone bridge, 350 Ohm load sensors on a single vessel.

Does this module require external transmitters?

No, the 1746-WS acts as a direct interface, which eliminates the need for additional external weight transmitters in the signal path.

What's clients say about us

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