HARDY HI 1756-WS Weigh Scale Module | Replacement, Equivalent & Selection Guide
The HARDY HI 1756-WS is a ControlLogix-platform weigh scale I/O module designed for high-accuracy process weighing in industrial automation environments. As an authorized sourcing partner, Konmask.com supplies genuine HI 1756-WS units along with verified compatible replacements and equivalent alternatives to minimize downtime and reduce procurement costs.
Technical Specifications
- Manufacturer: HARDY (Hardy Process Solutions)
- Model / SKU: HI 1756-WS
- Series: 1756 ControlLogix I/O
- Module Type: Weigh Scale Module
- Platform Compatibility: Allen-Bradley ControlLogix 1756 backplane
- Load Cell Inputs: Up to 8 load cells (350 Ω)
- Excitation Voltage: 10 VDC
- A/D Resolution: 24-bit
- Update Rate: Configurable (up to 200 Hz)
- Communication: ControlLogix backplane (RSLogix 5000 / Studio 5000)
- Weight: 1,240 g
- Certifications: CE, UL (verify current datasheet)
- Operating Temperature: 0 °C to 60 °C
Compatible Replacement & Equivalent Models
When the original HI 1756-WS is unavailable or cost-prohibitive, the following models are commonly evaluated as replacements. Always verify electrical and software compatibility before substitution.
- HARDY HI 1756-WS/A – Revised firmware variant; functionally equivalent in most applications
- HARDY HI 1769-WS – CompactLogix platform equivalent; requires chassis change
- Mettler Toledo IND780 – Stand-alone weighing terminal; suitable when backplane integration is not required
- Rice Lake 920i – Universal weight controller; requires external communication adapter for ControlLogix integration
- Siemens SIWAREX WP231 – S7-300/400 platform weigh module; cross-platform alternative for Siemens environments
Contact [email protected] for cross-reference verification before ordering.
Why Choose the Original HARDY HI 1756-WS
- Native ControlLogix backplane integration — no gateway or converter required
- 24-bit A/D resolution delivers laboratory-grade accuracy in plant-floor conditions
- Seamless configuration via Studio 5000 / RSLogix 5000 Add-On Instructions (AOI)
- HARDY C2 Second Generation electronic calibration eliminates the need for test weights
- Proven reliability in batching, blending, filling, and checkweighing applications
- Full OEM support, firmware updates, and long-term spare parts availability
Typical Applications
- Batch weighing and ingredient dosing in food & beverage processing
- Hopper and silo level monitoring in chemical and plastics industries
- Checkweighing and fill-weight verification on packaging lines
- Truck scale and tank weighing in logistics and bulk material handling
- Pharmaceutical process weighing requiring 21 CFR Part 11 compliance
System Compatibility
- PLC Platform: Allen-Bradley ControlLogix 1756 (all chassis sizes)
- Software: RSLogix 5000 v16+, Studio 5000 Logix Designer v21+
- Backplane Slots: Occupies 1 slot in any 1756 chassis
- Power Supply: Powered via ControlLogix backplane (no external 24 VDC required)
- Load Cell Wiring: 6-wire (sense) and 4-wire configurations supported
Selection Guide
Use the table below to identify the right weigh scale module for your application:
- ControlLogix platform + high accuracy (±0.01%) → HARDY HI 1756-WS ✓ Recommended
- CompactLogix platform → HARDY HI 1769-WS
- Stand-alone weighing (no PLC integration) → Mettler Toledo IND780 / Rice Lake 920i
- Siemens S7 platform → Siemens SIWAREX WP231
- Budget-sensitive retrofit → Contact Konmask for refurbished HI 1756-WS options
Quality Assurance & Sourcing
- All units sourced from authorized distributors or directly from HARDY Process Solutions
- Each module undergoes incoming inspection: visual check, label verification, and functional power-on test
- Anti-static packaging and climate-controlled storage to preserve module integrity
- Traceability documentation (COO, batch records) available upon request
- Warranty: 12 months from shipment date (manufacturing defects)
How to Order
- SKU: HI 1756-WS
- Lead Time: In-stock units ship within 1–3 business days; ex-stock orders within 7–14 days
- MOQ: 1 unit
- Payment: T/T, PayPal, credit card, and trade credit (approved accounts)
- Shipping: DHL / FedEx / UPS worldwide; sea freight available for bulk orders
- 📧 [email protected] | 📞 +0086 19859288691
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Replacement & Compatibility FAQ
Q: Can the HI 1756-WS replace an older HARDY WS-60 controller?
A: Not directly — the HI 1756-WS is a backplane module, while the WS-60 is a panel-mount instrument. A system redesign is required. Contact our engineers for a migration plan.
Q: Is the HI 1756-WS compatible with ControlLogix L8x controllers?
A: Yes. The module is compatible with all 1756 ControlLogix controllers running Studio 5000 v21 or later.
Q: Can I use the HI 1756-WS with third-party load cells?
A: Yes, provided the load cells are 350 Ω and support 10 VDC excitation. HARDY C2 calibration requires HARDY C2-certified load cells.
Q: What is the difference between HI 1756-WS and HI 1756-WS/A?
A: The /A suffix denotes a firmware or minor hardware revision. Functionally equivalent for most applications; confirm with HARDY for safety-critical installations.
Q: Do you supply refurbished or remanufactured units?
A: Yes. Refurbished units are available with a 6-month warranty. Specify “refurbished” when requesting a quote.
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Contact: [email protected] | +0086 19859288691
