Allen-Bradley 81000-199-52-R Weigh Scale Module | Replacement, Equivalent & Selection Guide
The Allen-Bradley 81000-199-52-R is a dedicated Weigh Scale Module designed for integration into Allen-Bradley (Rockwell Automation) PLC-based control systems. It provides precise analog weight measurement, signal conditioning, and direct communication with the host controller — making it a critical component in industrial weighing, batching, and process control applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 81000-199-52-R |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Module Type | Weigh Scale Module |
| Form Factor | Rack-mount / Plug-in Module |
| Input Type | Load Cell / Strain Gauge (mV/V) |
| Excitation Voltage | Typically 5–10 VDC (load cell excitation) |
| Resolution | High-resolution A/D conversion |
| Communication | Backplane / proprietary AB bus |
| Weight | 3,400 g (approx.) |
| Compliance | CE, UL (verify with current datasheet) |
Note: Always verify specifications against the official Rockwell Automation datasheet before final design-in.
Compatible Replacement & Equivalent Models
When the 81000-199-52-R is discontinued, obsolete, or unavailable, the following alternatives are commonly evaluated by engineers:
| Model | Manufacturer | Compatibility Notes |
|---|---|---|
| 1734-WSCN | Allen-Bradley | POINT I/O Weigh Scale — newer platform, may require adapter or gateway |
| 1756-LSC8XIB8I | Allen-Bradley | ControlLogix Load/Speed Control — functional equivalent for advanced applications |
| IND560 | METTLER TOLEDO | Stand-alone weighing terminal; integrates via EtherNet/IP or serial |
| WE350 | Siemens | Weighing module for S7 series; cross-platform, requires protocol conversion |
| NI-9237 | National Instruments | Bridge/strain gauge input module; suitable for custom integration |
Important: Compatibility depends on your existing rack, backplane, and software version. Contact [email protected] for a verified cross-reference before ordering.
Why Choose the Original Model
- Drop-in replacement — No firmware changes or re-wiring required when replacing like-for-like.
- Native backplane communication — Seamless integration with existing Allen-Bradley racks and RSLogix/Studio 5000 programming environments.
- Proven reliability — Field-tested in demanding industrial environments including food & beverage, chemical, and mining.
- Calibration retention — Preserves existing scale calibration parameters stored in the host PLC program.
- Reduced commissioning time — Plug-and-play replacement minimizes downtime during maintenance windows.
Typical Applications
- Batch weighing and ingredient dosing in food & beverage production
- Hopper and silo level measurement via load cells
- Checkweigher integration on packaging lines
- Truck scale and platform scale automation
- Chemical process batching and blending control
- Mining and bulk material handling systems
System Compatibility
| Platform | Compatible | Notes |
|---|---|---|
| Allen-Bradley PLC-5 | ✅ Yes | Native rack compatibility |
| Allen-Bradley SLC 500 | ⚠️ Verify | Confirm rack slot and backplane version |
| ControlLogix (1756) | ⚠️ Verify | May require bridge module or updated firmware |
| CompactLogix (1769) | ❌ Not direct | Use 1734-WSCN or gateway solution |
| Third-party PLC | ❌ Not direct | Protocol conversion required |
Selection Guide
Use the following decision framework to determine whether the 81000-199-52-R is the right module for your application:
- Confirm your rack platform — Identify the existing PLC rack model and backplane type.
- Check load cell type — Verify mV/V output range and excitation voltage compatibility.
- Assess channel count — Determine how many load cell inputs are required (single vs. multi-channel).
- Review software version — Ensure RSLogix or Studio 5000 version supports the module’s Add-On Profile (AOP).
- Evaluate accuracy requirements — For legal-for-trade (NTEP/OIML) applications, confirm module certification status.
- Consider lifecycle — If the module is end-of-life, evaluate migration to 1734-WSCN or equivalent with a gateway.
Not sure which module fits your system? Send us your system details and our engineers will provide a free selection recommendation.
Quality Assurance & Sourcing
- Source: Authorized distributors, certified refurbishers, and verified surplus channels.
- Inspection: Each unit undergoes visual inspection, functional verification, and packaging integrity check before shipment.
- Warranty: 90-day replacement warranty on all stocked units (terms apply).
- Traceability: Batch records and supplier documentation available upon request for regulated industries.
- Anti-counterfeit: We source only from traceable supply chains. Counterfeit risk disclosure provided on request.
How to Order
- Add to cart directly, or
- Email [email protected] with your PO or RFQ, or
- Call / WhatsApp: +0086 19859288691
- Provide your shipping address and required delivery timeline for a freight quote.
- Lead time: In-stock units ship within 1–3 business days; sourced units 5–15 business days.
Replacement & Compatibility FAQ
Q: Is the 81000-199-52-R still in production?
A: This module is considered legacy/obsolete by Rockwell Automation. We source from certified surplus and refurbished channels. Contact us to confirm current stock availability.
Q: Can I use a 1734-WSCN as a direct replacement?
A: Not directly — the 1734-WSCN uses the POINT I/O platform and requires a different rack and adapter. However, it is a functional equivalent with a gateway or system redesign.
Q: Will my existing calibration data be preserved?
A: Yes, if you replace with an identical 81000-199-52-R unit. Calibration is stored in the PLC program, not the module itself.
Q: Do you offer exchange / core return programs?
A: Yes. Contact us for details on exchange pricing if you have a faulty unit to return.
Q: Can this module be used with third-party load cells?
A: Generally yes, provided the load cell output (mV/V) and excitation voltage match the module’s input specifications. Verify with the datasheet.
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