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Allen-Bradley / Hardy Process Solutions 1756-2WS Dual-Channel Weigh Scale Module

Original price was: $9,889.00.Current price is: $7,666.00.

Parameter Value / Specification
Product Line ControlLogix System Component (Hardy Process Solutions)
Number of Channels 2 fully independent scale channels
Load Cell Excitation 5 V DC output; drives up to eight 350-ohm load cells total (4 per channel)
Signal Input Range −0.3 mV through +15.3 mV DC
Internal Resolution 1:8,388,608 (24-bit analog-to-digital conversion)
Conversion Update Rate Up to 110 updates per second (selectable per channel)
Backplane Current (5V) 1.0 A (Amperes maximum)
Backplane Current (24V) 0.0125 A (Amperes)
Core Software Integration Studio 5000 Add-On Profile (AOP) and native Add-On Instructions (AOI)
Operating Temperature 0 to +60°C
Category: SKU: Allen-Bradley 1756-2WS Tag:

Description

During a recent ingredient batching upgrade at a plastics compounding plant in Kentucky, the engineering team wrestled with erratic raw material readings caused by massive structural vibrations from nearby blenders. Slapping in a 1756-2WS module settled the data stream instantly. This specialized ControlLogix plug-in asset, developed via the Rockwell Encompass partner program by Hardy Process Solutions, reads and processes raw millivolt signals from strain gauge load cells directly across the chassis backplane without external inline transmitters.

Are you looking to replace an active weighing point or reduce the panel footprint of external scale instruments? Field implementations show this module maintains crisp weight tracking during heavy mechanical cycling.

 

Global Logistics, Availability, and Warranty Terms

Procuring high-resolution process instrumentation requires clear supply chain logistics to prevent batching lines from sitting idle.

  • Product Condition: New Original (New Surplus) or Factory Sealed options available with complete internal calibration data.
  • Stock Availability: Stocked at global distribution points for rapid international fulfillment.
  • Standard Lead Time: Dispatches within 1 to 2 business days via global air express lines.
  • Warranty Support: Covered by a full 12-month industrial replacement warranty starting from the day of shipping.
  • International Pricing Note: The listed value represents a reference market point. Actual line-item invoicing depends on global spot market trends, regional inventory depth, and purchase volumes. Connect with our trade desk for an explicit pro forma quote.

 

Technical Specifications: 1756-2WS

The 1756-2WS provides two independent scale channels inside a single slot housing. Review these parameters before finalizing your load cell summing box wiring diagrams.

Parameter Value / Specification
Product Line ControlLogix System Component (Hardy Process Solutions)
Number of Channels 2 fully independent scale channels
Load Cell Excitation 5 V DC output; drives up to eight 350-ohm load cells total (4 per channel)
Signal Input Range −0.3 mV through +15.3 mV DC
Internal Resolution 1:8,388,608 (24-bit analog-to-digital conversion)
Conversion Update Rate Up to 110 updates per second (selectable per channel)
Backplane Current (5V) 1.0 A (Amperes maximum)
Backplane Current (24V) 0.0125 A (Amperes)
Core Software Integration Studio 5000 Add-On Profile (AOP) and native Add-On Instructions (AOI)
Operating Temperature 0 to +60°C

 

Field Implementation and Core Toolbox Integration

The distinct advantage of the 1756-2WS centers on its native producer/consumer backplane link, which passes data arrays directly to the ControlLogix processor without requiring explicit message rungs.

Well, technically the module can digitize up to 110 updates per second, but its performance in rough industrial spaces depends on setting up your internal filtering parameters correctly. In our field deployments, we rely heavily on the embedded WAVERSAVER algorithm. This feature screens out building vibrations—down to 0.25 Hz—allowing the module to capture actual material weight while ignoring a shaky floor. When wiring up your vessels, using the matching C2 load cells lets you use electronic calibration. This setup allows you to calibrate the entire scale through the HMI faceplate with a single tap, bypassing the old, exhausting method of dragging physical test weights across the plant floor.

 

Cross-Border Shipping and Customs Compliance

Moving high-precision weighing electronics through international trade zones requires exact documentation to skip past clearing holds.

Export Controls and Commodity Codes

This electronic module is classified under Export Control Classification Number (ECCN) EAR99 and is tracked worldwide via the Harmonized System Tariff Code HS 903180. Every shipment undergoes automated restricted-party verification before being loaded onto international transit fleets.

Logistics Logistics and Incoterms

For critical factory floor line stoppages, we deploy Priority International Air Express (via DHL, FedEx, or UPS), maintaining a 3 to 5 business day delivery window to major manufacturing centers worldwide. Standard shipments are processed under CIP (Carriage and Insurance Paid to Destination) Incoterms 2020 rules.

Import Clearance Requirement: Local customs tariffs, regional sales taxes (such as VAT or GST), and local customhouse entry brokerage fees are outside our billing footprint. The buyer’s designated customs broker must settle these values with local authorities during incoming border transit.

 

Frequently Asked Questions

Can this module support more than four 350-ohm load cells on a single channel?

The internal 5 V DC excitation circuit can natively power up to four 350-ohm load cells per channel (eight total for the module). If you have a large storage silo that uses six or eight load cells on a single vessel, you must wire an external auxiliary power supply into the load cell summing junction box.

What is the exact purpose of the Remote Termination Assembly (RTA) option?

The optional 1756-XX-RTA interface panel allows you to land your field load cell cables on a separate DIN-rail terminal block inside the panel. This allows you to replace a damaged 1756-2WS card down the road via a pre-wired harness cable without touching your delicate, low-millivolt field terminations.

How does the module indicate an individual load cell wiring fault?

When paired with an IT-compatible junction box, the Integrated Technician utility lets you read individual cell voltages directly from your laptop. If a field wire snaps or a strain gauge shorts out, the module spots the voltage drop and sends an explicit diagnostic alarm bit straight to your Logix tag array.

What specific material handling application (e.g., loss-in-weight feeding or vessel level monitoring) are you configuring for these two channels?

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