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

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.