Allen-Bradley 1756-A7 ControlLogix 7-Slot Chassis – ControlLogix Modular Backplane System
When a ControlLogix chassis fails mid-production, the consequences are immediate and severe: conveyor lines halt, batch processes abort, and every minute of unplanned downtime translates directly into lost revenue and missed delivery commitments. In process-critical environments — automotive stamping, oil & gas pipeline control, pharmaceutical batch manufacturing — the chassis is not a passive enclosure; it is the high-speed communication backbone that keeps every I/O module, processor, and communication card synchronized. Without a reliable chassis, the entire control architecture collapses.
The Allen-Bradley 1756-A7 occupies a precise niche within the ControlLogix 1756 platform: a 7-slot backplane that balances system density with installation footprint. Positioned between the compact 4-slot 1756-A4 and the high-density 10- and 13-slot variants, the 1756-A7 is the preferred choice for mid-complexity control panels where engineers need room for a processor, redundant power supply, multiple I/O modules, and at least one communication bridge — without over-specifying rack space. As part of Rockwell Automation’s flagship ControlLogix family, it is deployed across tens of thousands of installations worldwide and remains one of the most specified chassis in global industrial automation projects.
Technical Specifications
- Part Number: 1756-A7
- Series: ControlLogix (1756 Platform)
- Number of Slots: 7
- Backplane Communication: ControlLogix high-speed backplane bus
- Compatible Power Supplies: 1756-PA72, 1756-PB72, 1756-PA75, 1756-PB75, 1756-PSCA2 (redundant)
- Mounting: DIN rail or panel mount
- 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
- Weight: Approx. 1.4 kg (bare chassis)
- Certifications: UL, CE, cUL (verify current listing with Rockwell Automation)
- Country of Origin: USA
Key Features & Benefits
- 7-Slot Flexibility: Accommodates processor, power supply, I/O, and communication modules in a single compact rack — ideal for mid-scale control panels.
- High-Speed Backplane: The ControlLogix backplane delivers deterministic, high-bandwidth communication between all installed modules, eliminating inter-module latency.
- Hot-Swap Module Support: Modules can be inserted and removed under power (with appropriate precautions), minimizing maintenance downtime.
- Redundancy Ready: Supports controller redundancy configurations when paired with 1756-RM2 redundancy modules and compatible processors.
- Scalable Architecture: Easily expanded via EtherNet/IP or ControlNet remote I/O racks as system requirements grow.
- Long Product Lifecycle: Part of Rockwell Automation’s long-term supported ControlLogix platform, ensuring spare parts availability for decades.
- Wide Environmental Tolerance: Rated for harsh industrial environments including elevated temperatures and high-vibration installations.
Industry & Equipment Applications
- Automotive Manufacturing: Body welding lines, paint shop conveyors, press control systems
- Oil & Gas: Pipeline SCADA panels, compressor station control, wellhead automation
- Pharmaceutical & Food & Beverage: Batch process control, CIP/SIP systems, filling line automation
- Power Generation & Utilities: Substation automation, turbine control, water treatment SCADA
- Mining & Minerals: Conveyor drive control, crusher automation, slurry pump management
- Pulp & Paper: Winder control, digester automation, DCS migration projects
- Machine Building (OEM): Packaging machines, palletizers, robotic cell controllers
System Integration & Compatible Parts
The 1756-A7 chassis is the foundation of a complete ControlLogix system. Typical configurations include:
- Processors: 1756-L71, 1756-L72, 1756-L73, 1756-L74, 1756-L75, 1756-L81E, 1756-L82E, 1756-L83E, 1756-L84E, 1756-L85E
- Power Supplies: 1756-PA72 (120/240 VAC), 1756-PB72 (18–32 VDC), 1756-PA75, 1756-PB75
- Communication Modules: 1756-EN2T (EtherNet/IP), 1756-EN2TR (ring topology), 1756-CN2 (ControlNet), 1756-DNB (DeviceNet)
- Digital I/O: 1756-IB16, 1756-OB16E, 1756-IA16, 1756-OA16
- Analog I/O: 1756-IF8, 1756-OF8, 1756-IF16
- Redundancy: 1756-RM2, 1756-SYNCH
Contact Konmask.com for complete BOM support and cross-reference assistance.
Our Quality Assurance Process
Every Allen-Bradley 1756-A7 chassis shipped from Konmask.com undergoes a structured inspection process:
- Visual Inspection: Backplane connector pins, slot guides, and housing integrity checked against OEM specifications.
- Label & Traceability Verification: Part number, series letter, and date code confirmed against Rockwell Automation documentation.
- Functional Pre-Check: Where applicable, chassis are bench-tested with a compatible power supply prior to shipment.
- Anti-Static Packaging: All units are packed in ESD-safe materials with moisture barrier bags for international transit.
- Documentation: Certificate of conformity and inspection report available upon request.
How to Order
- Submit your inquiry via the Contact / RFQ form on this page or email support@konmask.com.
- Provide your required quantity, delivery timeline, and destination country.
- Our technical team will confirm stock availability, lead time, and issue a formal quotation within 24 business hours.
- Upon PO confirmation, we arrange export documentation, freight, and insurance as required.
- Tracking information and shipping documents (commercial invoice, packing list, COO) are provided before dispatch.
Minimum Order Quantity: 1 unit | Lead Time: Subject to stock availability — contact us for current status.
Why Choose Konmask.com?
- Industrial Automation Specialists: Our team has deep expertise in Rockwell Automation, Siemens, Schneider Electric, and other leading PLC/DCS platforms.
- Global Export Experience: We serve engineering firms, system integrators, and MRO buyers across Asia, the Middle East, Europe, and the Americas.
- Competitive Pricing: Direct sourcing relationships and lean operations allow us to offer market-competitive pricing on both new and surplus stock.
- Technical Pre-Sales Support: Not sure if the 1756-A7 is the right chassis for your application? Our engineers will review your BOM and advise.
- Reliable Logistics: DHL, FedEx, and freight forwarding options with full export documentation support.
- Responsive Communication: Dedicated account managers respond to RFQs within one business day.
Frequently Asked Questions
Q: What is the difference between the 1756-A7 and 1756-A7/B?
A: The /B suffix denotes a later series revision. Both are functionally compatible with the same ControlLogix modules; the revision may affect minor mechanical or cosmetic details. Contact us to confirm the series available in current stock.
Q: Can I use the 1756-A7 with a 1756-L8x series processor?
A: Yes. The 1756-A7 chassis is compatible with all ControlLogix processors including the current L8x generation (1756-L81E through 1756-L85E), provided a compatible power supply is installed.
Q: Is the 1756-A7 suitable for SIL-rated safety applications?
A: The standard 1756-A7 is not a safety-rated chassis. For SIL 2/3 applications, Rockwell Automation’s GuardLogix platform (1756-L7SP, 1756-L8SP) with appropriate safety I/O is required.
Q: Do you supply the power supply separately?
A: Yes. We stock a range of 1756-series power supplies. Please include your power supply requirements in your RFQ.
Q: What warranty do you offer?
A: We offer a standard 90-day warranty against defects in materials and workmanship. Extended warranty options are available — please inquire at the time of order.
Q: Can you provide an export license or end-user certificate?
A: We can assist with standard export documentation. Certain destinations may require additional compliance review. Please disclose your end destination when submitting your RFQ.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
{
“@context”: “https://schema.org”,
“@graph”: [
{
“@type”: “Product”,
“name”: “Allen-Bradley 1756-A7 ControlLogix 7-Slot Chassis”,
“description”: “The Allen-Bradley 1756-A7 is a 7-slot ControlLogix backplane chassis supporting all 1756-series processors, power supplies, I/O, and communication modules. Ideal for mid-complexity industrial automation control panels.”,
“sku”: “1756-A7”,
“brand”: {
“@type”: “Brand”,
“name”: “Allen-Bradley”
},
“manufacturer”: {
“@type”: “Organization”,
“name”: “Rockwell Automation”
},
“category”: “PLC Chassis / Industrial Automation”,
“url”: “https://konmask.com/products/allen-bradley-1756-a7-controllogix-7-slot-chassis”,
“offers”: {
“@type”: “Offer”,
“priceCurrency”: “USD”,
“availability”: “https://schema.org/InStock”,
“seller”: {
“@type”: “Organization”,
“name”: “Konmask.com”,
“url”: “https://konmask.com”
}
}
},
{
“@type”: “FAQPage”,
“mainEntity”: [
{
“@type”: “Question”,
“name”: “What is the difference between the 1756-A7 and 1756-A7/B?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The /B suffix denotes a later series revision. Both are functionally compatible with the same ControlLogix modules; the revision may affect minor mechanical or cosmetic details.”
}
},
{
“@type”: “Question”,
“name”: “Can I use the 1756-A7 with a 1756-L8x series processor?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. The 1756-A7 chassis is compatible with all ControlLogix processors including the current L8x generation (1756-L81E through 1756-L85E), provided a compatible power supply is installed.”
}
},
{
“@type”: “Question”,
“name”: “Is the 1756-A7 suitable for SIL-rated safety applications?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “The standard 1756-A7 is not a safety-rated chassis. For SIL 2/3 applications, Rockwell Automation’s GuardLogix platform with appropriate safety I/O is required.”
}
},
{
“@type”: “Question”,
“name”: “Do you supply the power supply separately?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “Yes. We stock a range of 1756-series power supplies. Please include your power supply requirements in your RFQ.”
}
},
{
“@type”: “Question”,
“name”: “What warranty do you offer?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “We offer a standard 90-day warranty against defects in materials and workmanship. Extended warranty options are available upon request.”
}
},
{
“@type”: “Question”,
“name”: “Can you provide an export license or end-user certificate?”,
“acceptedAnswer”: {
“@type”: “Answer”,
“text”: “We can assist with standard export documentation. Certain destinations may require additional compliance review. Please disclose your end destination when submitting your RFQ.”
}
}
]
}
]
}
