Description
The Allen-Bradley 1756-WS is a high-performance weigh scale interface module engineered for the ControlLogix platform. Developed through a partnership with Hardy Process Solutions, this module integrates directly into the ControlLogix chassis, enabling seamless communication between industrial load cells and the controller. By eliminating the necessity for external signal conditioners or transmitters, it streamlines system architecture and reduces wiring complexity in critical weighing operations.
Features
- Direct integration with ControlLogix backplane for high-speed data exchange.
- Single-channel design capable of supporting up to four 350-Ohm load cells.
- High-speed processing with an update rate of 50 updates per second for real-time monitoring.
- Exceptional measurement precision featuring 0.0015% of full-scale non-linearity.
- Supports advanced industrial weighing tasks including batching, filling, and vessel monitoring.
Applications
This module is ideal for demanding industrial environments requiring precise force measurement and weight control. It is commonly utilized in automated batching systems, liquid filling lines, hopper and tank weighing, and general-purpose force measurement applications where high repeatability and accuracy are mandatory.
Technical Specifications
| Brand |
Allen-Bradley (Hardy Process Solutions) |
| Platform |
ControlLogix |
| Module Type |
Weigh Scale / Load Cell Module |
| Channels |
Single Channel |
| Load Cell Support |
Up to four 350-Ohm load cells |
| Update Rate |
50 updates per second |
| Non-Linearity |
0.0015% of Full Scale |
| Excitation Voltage |
5V DC |
| Common-Mode Voltage |
2.5V DC maximum |
| Operating Temperature |
0 to 60 degC (32 to 140 degF) |
| Storage Temperature |
-40 to 85 degC (-40 to 185 degF) |
| Relative Humidity |
0% to 90% non-condensing |
Installation Guidelines
- Ensure the ControlLogix chassis is powered down before inserting or removing the 1756-WS module.
- Install the module into any available slot within the ControlLogix I/O chassis.
- Use shielded twisted-pair cabling for load cell connections to minimize electromagnetic interference (EMI).
- Maintain proper grounding practices for the chassis backplane to ensure signal integrity.
- Verify that the load cell wiring matches the terminal block pinout configuration to prevent excitation voltage errors.
FAQ
Does this module require an external transmitter?
No, the 1756-WS is designed to connect directly to load cells, acting as the interface to the ControlLogix backplane without external signal conditioning hardware.
How many load cells can be connected?
The module supports a single channel, which can accommodate up to four 350-Ohm load cells connected in parallel.
