Allen-Bradley 1756-A10K – 10-Slot ControlLogix Chassis | ControlLogix Platform
Engineering Background: The ControlLogix platform, introduced by Rockwell Automation, is the industry benchmark for high-performance programmable automation controllers (PAC). Designed for demanding process, discrete, and motion control applications, the ControlLogix backplane architecture enables modular, scalable system design with deterministic communication between all installed modules.
Product Positioning: The Allen-Bradley 1756-A10K is a 10-slot ControlLogix chassis engineered for mid-to-large scale control systems requiring high module density. The “K” suffix designates the conformal-coated variant, providing enhanced protection against moisture, dust, and corrosive atmospheres — making it the preferred choice for harsh industrial environments where standard chassis cannot meet reliability requirements.
Complete Technical Specifications
- Part Number: 1756-A10K
- Series: ControlLogix (1756 Series)
- Manufacturer: Allen-Bradley / Rockwell Automation
- Number of Slots: 10 (accepts any combination of ControlLogix modules)
- Backplane Communication: ControlLogix proprietary high-speed backplane bus
- Power Supply Compatibility: 1756-Pxx series (sold separately)
- Conformal Coating: Yes (“K” suffix — IPC-A-610 Class 3 standard)
- Operating Temperature: 0°C to 60°C (32°F to 140°F)
- Storage Temperature: -40°C to 85°C
- Relative Humidity: 5% to 95% non-condensing
- Vibration Rating: IEC 68-2-6 compliant
- Shock Rating: IEC 68-2-27 compliant
- Enclosure Rating: Open type (requires installation in rated enclosure)
- Agency Certifications: UL, CE, CSA, C-Tick
- Weight: Approx. 0.5 kg (chassis only, without modules)
- Dimensions (H × W × D): Per Rockwell publication 1756-IN005
- Catalog Number: 1756-A10K
Proven Application Environments
- Oil & Gas: Wellhead control panels, pipeline SCADA RTUs, compressor station automation — conformal coating resists H₂S and salt-laden atmospheres
- Chemical & Petrochemical: Reactor control, batch processing, DCS migration projects requiring high I/O density in a single chassis
- Automotive Manufacturing: Body-in-white welding lines, paint shop conveyors, press automation with coordinated motion and I/O in one rack
- Water & Wastewater: Pump station control, SCADA integration, remote lift stations exposed to high humidity and condensation
- Food & Beverage: CIP (Clean-in-Place) environments, cold storage facilities, packaging lines requiring washdown-adjacent electronics protection
- Mining: Underground conveyor control, ore processing, environments with coal dust and high vibration
- Power Generation: Turbine control auxiliaries, substation automation, environments with electrical noise and temperature cycling
Engineering Advantages
- Conformal Coating (K-variant): Protects PCB traces and connectors from corrosion, condensation, and particulate contamination — extends MTBF in harsh environments
- 10-Slot Density: Maximises module count per chassis, reducing total rack count and inter-chassis cabling complexity
- Universal Module Compatibility: Accepts all 1756-series controllers, I/O, communication, and motion modules without slot restrictions
- Redundancy Ready: Supports 1756-RM2/RM2K redundancy modules for controller redundancy configurations
- Hot-Swap Capable: Modules can be inserted and removed under power (with appropriate module support), minimising planned downtime
- Scalable Architecture: Multiple chassis can be linked via ControlBus extender or EtherNet/IP for distributed I/O expansion
- Long Product Lifecycle: ControlLogix 1756 platform has a documented Rockwell Automation lifecycle commitment, protecting capital investment
System Architecture & Signal Flow
In a typical ControlLogix system, the 1756-A10K chassis serves as the physical backbone. A 1756-Pxx power supply occupies the rightmost dedicated slot and delivers regulated DC power to the backplane. The controller module (e.g., 1756-L8x series) resides in any standard slot and communicates with all other modules via the high-speed backplane bus at deterministic scan rates. I/O modules (digital, analog, specialty) connect to field devices; communication modules (EtherNet/IP, DeviceNet, PROFIBUS) bridge to plant networks and remote I/O. For redundant systems, a 1756-RM2K redundancy module pair synchronises two chassis over a dedicated fiber link, enabling bumpless transfer on controller fault.
Sourcing & Quality Verification
- All units sourced through authorised distribution channels or verified surplus with full traceability documentation
- Each chassis inspected for backplane connector integrity, slot guide rail condition, and conformal coating coverage
- Serial number and date code verification against Rockwell Automation product authenticity guidelines
- Functional backplane continuity test performed prior to shipment
- Anti-static packaging with humidity indicator cards for international freight
- Certificate of conformance available upon request
Procurement Process
- Submit your BOM or part number to support@konmask.com for availability and lead time confirmation
- Receive formal quotation with unit price, quantity, and shipping terms (EXW / DDP options available)
- Issue PO — payment via T/T, PayPal, or trade finance instruments accepted
- Quality inspection and documentation package prepared (CoC, photos, test report)
- Shipment via DHL / FedEx / sea freight with full tracking; typical lead time 3–7 business days for in-stock items
- Post-delivery technical support available via email and WhatsApp
Technical FAQ
Q: What is the difference between 1756-A10 and 1756-A10K?
A: The 1756-A10K is the conformal-coated version of the standard 1756-A10. The “K” suffix indicates IPC-A-610 Class 3 conformal coating applied to the backplane PCB, providing superior protection in humid, corrosive, or dusty environments. Electrically and mechanically, both are identical.
Q: Can I mix controller and I/O modules in the same 1756-A10K chassis?
A: Yes. Any combination of ControlLogix 1756-series modules — controllers, I/O, communication, motion, and redundancy — can be installed in any slot of the 1756-A10K chassis.
Q: Does the 1756-A10K support controller redundancy?
A: Yes. When paired with a 1756-RM2K redundancy module and a matching secondary chassis, the 1756-A10K supports full ControlLogix redundancy (SIL 2 capable configurations with appropriate safety modules).
Q: What power supply is required?
A: The 1756-A10K requires a 1756-series power supply (e.g., 1756-PA72, 1756-PB72, 1756-PC75). Power supply selection depends on input voltage (AC/DC) and total chassis current draw from installed modules.
Q: Is the 1756-A10K still in active production?
A: Rockwell Automation maintains the ControlLogix 1756 platform as an active product line. Contact us for current availability and lead time for new or refurbished units.
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