Description
Product Name: 1771-A3BK Allen Braley Programmable controller
Product details:
The 1771-A3BK is a 12-slot chassis designed for backpanel mounting in industrial enclosures. The “K” suffix typically denotes a conformal coating, which provides an extra layer of protection against moisture, dust, and chemical contaminants, making it ideal for harsh environments. It facilitates communication between the processor and the I/O modules via a high-speed backplane.
Technical Specifications
| Feature | Specification |
| Number of Slots | 12 Slots |
| Mounting Type | Backpanel Mount |
| Compatible Modules | All 1771 I/O Modules (Digital, Analog, Specialty) |
| Processor Compatibility | PLC-5 series (e.g., PLC-5/11, 5/20, 5/40, 5/80) |
| Power Supply | Requires external 1771 power module (e.g., 1771-P4, 1771-P7) |
| Operational Temp | 0 to 60 °C (32 to 140 °F) |
| Coating | Conformal Coated (K-version) |
| Dimensions | Approximately 19 x 12.4 x 7.6 inches |
Key Advantages
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Durability: Built to withstand high-vibration and high-temperature industrial settings.
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Environmental Protection: The conformal coating allows the unit to operate reliably in corrosive or humid atmospheres where standard boards might fail.
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Scalability: With 12 slots, it offers a high density of I/O points in a single footprint, reducing the need for multiple smaller chassis.
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Legacy Reliability: The 1771 platform is world-renowned for its “bulletproof” reliability and long lifecycle in heavy industry.
Important Considerations & Precautions
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Power Requirements: The chassis does not have a built-in power supply. You must ensure the chosen power supply module can handle the total current draw of all installed modules.
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Addressing Modes: Ensure the backplane DIP switches are correctly set for 2-slot, 1-slot, or 1/2-slot addressing to match your PLC program configuration.
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Electrostatic Discharge (ESD): Always wear a grounding strap when handling the backplane or inserting modules to prevent circuit damage.
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Modernization: As the 1771 series is now in “End of Life” (EOL) or “Discontinued” status by Rockwell Automation, users should consider keeping spare parts on hand or planning a migration to ControlLogix (1756).
Product Applications
The 1771-A3BK is commonly found in heavy-duty sectors including:
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Oil and Gas: Monitoring remote pipelines and refinery processes.
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Steel Mills: Controlling high-heat blast furnaces and rolling mills.
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Automotive: Managing large-scale assembly line logic and robotics coordination.
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Water Treatment: Supervising pumps, filtration systems, and chemical dosing.
Advantages: Foxboro, OVATION, TRICONEX, Allen-Bradley, ABB, Motorola, Siemens Moore, Ge Fanuc, Woodward, Bently Nevada and other major import brands!
We have the same series of models in stock. If you don’t find the model you need, please contact us and we will provide you with an official quotation！
Colour：new Warranty: 12 months
Lead Time：3-day working day Country of origin: Sweden
Price: Please contact us Product weight：0.515kg
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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