Allen-Bradley 1756-CMS1B1 High-Performance Compute Module – ControlLogix 1756 Series
When a ControlLogix system loses its compute module, the entire control architecture comes to a halt. Real-time data processing stops, deterministic task execution fails, and production lines dependent on coordinated motion, safety interlocks, or high-speed I/O scanning face unplanned downtime that can cost thousands of dollars per hour. The Allen-Bradley 1756-CMS1B1 is the dedicated compute module engineered to prevent exactly this scenario — delivering the processing backbone that keeps your ControlLogix chassis running at full capacity.
Within the Rockwell Automation 1756 ControlLogix platform — the world’s most widely deployed modular PLC architecture — the 1756-CMS1B1 occupies a specialized role as a compute-intensive processing resource. Unlike standard controller modules, it is designed to offload computational tasks, enabling the primary controller to maintain deterministic scan times even under heavy data loads. Trusted by system integrators and OEMs across automotive, oil & gas, food & beverage, and discrete manufacturing sectors globally, this module represents Rockwell’s commitment to scalable, high-availability control system design.
Technical Specifications
- Part Number / SKU: 1756-CMS1B1
- Series: Rockwell Automation ControlLogix 1756
- Module Type: Compute Module
- Form Factor: 1756 ControlLogix chassis-mount
- Backplane Compatibility: ControlLogix 1756 series backplane
- Communication: Via ControlLogix backplane bus
- 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
- Certifications: CE, UL, cUL (verify with official Rockwell datasheet)
- Mounting: DIN rail or panel mount via ControlLogix chassis
Note: Always verify specifications against the official Rockwell Automation product datasheet for your specific revision and firmware requirements.
Key Features & Benefits
- Dedicated Compute Offloading: Frees the primary ControlLogix controller from compute-intensive tasks, preserving deterministic scan performance.
- Seamless Backplane Integration: Installs directly into any 1756 ControlLogix chassis slot — no external wiring or special adapters required.
- High Availability Design: Supports redundant system architectures when paired with appropriate ControlLogix redundancy modules.
- Scalable Architecture: Fits within Rockwell’s modular 1756 ecosystem, allowing system expansion without redesign.
- Industrial-Grade Reliability: Built to withstand harsh industrial environments including vibration, temperature extremes, and electrical noise.
- Rockwell Ecosystem Compatibility: Fully compatible with Studio 5000 Logix Designer programming environment and RSLogix 5000.
Industry & Equipment Applications
- Automotive Manufacturing: Body welding lines, paint shop automation, and assembly conveyor control requiring high-speed coordinated processing.
- Oil & Gas: Pipeline SCADA systems, compressor station control, and wellhead automation with demanding real-time data requirements.
- Food & Beverage: High-throughput packaging lines, batch processing systems, and CIP (Clean-In-Place) sequence control.
- Pharmaceutical: Validated manufacturing environments requiring precise, auditable process control with deterministic execution.
- Discrete Manufacturing: CNC machine tool integration, robotic cell controllers, and multi-axis motion coordination.
- Water & Wastewater: Treatment plant automation with distributed I/O and centralized compute requirements.
System Integration & Compatible Parts
The 1756-CMS1B1 is designed to operate within the broader Allen-Bradley 1756 ControlLogix ecosystem. Compatible and commonly paired components include:
- Controllers: 1756-L71, 1756-L72, 1756-L73, 1756-L74, 1756-L75, 1756-L81E, 1756-L82E, 1756-L83E, 1756-L84E, 1756-L85E
- Chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
- Power Supplies: 1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75
- Communication Modules: 1756-EN2T, 1756-EN2TR, 1756-EN3TR, 1756-ENBT, 1756-CN2, 1756-DNB
- I/O Modules: 1756-IB16, 1756-OB16E, 1756-IF8, 1756-OF8
- Redundancy Modules: 1756-RM2, 1756-RM2XT
Our Quality Assurance Process
At Konmask.com, every Allen-Bradley 1756-CMS1B1 unit we supply undergoes a rigorous multi-stage verification process before shipment:
- Source Verification: All units are sourced from authorized distributors or verified surplus channels with full traceability documentation.
- Visual Inspection: Physical examination for damage, counterfeit indicators, and label authenticity.
- Functional Testing: Where applicable, modules are bench-tested to confirm operational status prior to dispatch.
- Packaging: Anti-static packaging with moisture barrier protection for safe international transit.
- Documentation: Certificate of conformance and test reports available upon request.
How to Order
- Submit your inquiry via the Contact Us form or email support@konmask.com with your required quantity and delivery timeline.
- Our technical team will confirm availability, lead time, and provide a formal quotation within 24 business hours.
- Upon PO confirmation, we arrange secure packaging and international freight with full tracking.
- Post-delivery technical support is available for integration and commissioning queries.
Why Choose Konmask.com?
- B2B Industrial Specialist: We exclusively serve industrial automation buyers — no consumer distractions, just expert parts sourcing.
- Global Supply Network: Access to new, surplus, and refurbished Allen-Bradley inventory across multiple continents.
- Technical Expertise: Our team includes qualified automation engineers who understand your application requirements.
- Fast Response: Quotations within 24 hours, with expedited sourcing available for urgent shutdowns.
- Secure Transactions: T/T, L/C, and other B2B payment terms available for qualified buyers.
- Export Compliance: Full documentation support for customs clearance in major import markets.
Frequently Asked Questions
Q: What is the difference between the 1756-CMS1B1 and other ControlLogix compute modules?
A: The 1756-CMS1B1 is a specific revision/configuration within the ControlLogix compute module family. Always cross-reference the full part number including series suffix to ensure compatibility with your existing chassis firmware and controller revision.
Q: Is the 1756-CMS1B1 compatible with all ControlLogix chassis sizes?
A: Yes, it is designed to fit any standard 1756 ControlLogix chassis (4, 7, 10, 13, or 17 slot) as it occupies a standard backplane slot.
Q: Can Konmask.com supply this module with a warranty?
A: Yes. We offer a standard warranty on all units supplied. Warranty terms vary by unit condition (new vs. tested surplus) — please request details with your quotation.
Q: What is the typical lead time for the 1756-CMS1B1?
A: Lead time depends on current stock levels. In-stock units typically ship within 3–5 business days internationally. Contact us for real-time availability.
Q: Do you provide export documentation for customs clearance?
A: Yes. We provide commercial invoices, packing lists, certificates of origin, and other documentation required for import in most countries.
Q: Can I request a datasheet or technical manual for the 1756-CMS1B1?
A: Yes. Contact our technical team and we will provide the relevant Rockwell Automation publication references and available documentation.
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