12 in stock
Allen Bradley 1747-L551/A CPU Processors
Allen Bradley 1747-L551/A CPU Processors
Brand/Manufacturer: Allen-Bradley
Order Number: 1747-L551/A
Type: CPU Processors
Country of Origin: USA
Condition: Original Brand
Lead Time: Available in stock
Payment Term: 100% TT In Advance
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Description
Configured for discrete and analog automation control in SLC 500 rack architectures, the Allen-Bradley 1747-L551/A, also cataloged as the 1747-L551/A SLC 5/05 Processor Module, provides direct physical and electrical execution for program instruction processing and I/O coordination.
Suffix Breakdown & Model Matrix
| Model Identifier | Series / Platform | Core Function | Memory & Communication |
|---|---|---|---|
| 1747-L551/A | SLC 500 / SLC 5/05 | Central Processing Unit (CPU) | 16 KB Memory, Ethernet & RS-232 Ports |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1747-L551/A |
| Brand | Allen-Bradley / Rockwell Automation |
| Origin | USA |
| Weight | 0.64 lbs (0.29 kg) |
| Dimensions | Standard SLC 500 single-slot module profile |
| Operating Temp | 0 deg C to 60 deg C (32 deg F to 140 deg F) |
| Power Consumption | Backplane current: 1000 mA at 5 VDC, 200 mA at 24 VDC |
| Core Function | SLC 5/05 Processor Module |
| User Memory | 16 KB (Flash EEPROM) |
| Processing Speed | 0.9 ms per 1K of user program |
| I/O Capacity | Up to 8192 digital I/O max across local chassis |
Backplane Bus Communication Velocity and Firmware Compatibility
Configured for deterministic industrial network execution, the module maintains strict backplane bus communication velocity and real-time data exchange across local SLC 500 chassis racks. Firmware flash compatibility, integrated Ethernet communication, and multi-protocol RS-232 ports (supporting DH-485, DF1, Modbus, and ASCII) ensure synchronized instruction processing without introducing communication latency or timing jitter into the control loop.
Frequently Asked Questions
Q: What communication interfaces are available on the 1747-L551/A processor?
A: The processor features an integrated Ethernet port for network communications and programming, alongside an RS-232 port supporting DH-485, DF1, Modbus, and ASCII protocols.
Q: Can this processor module be replaced while the chassis backplane is energized?
A: No, system rack power must be fully isolated and de-energized prior to removing or inserting the processor module to prevent electrical arcing or backplane pin damage.
Field Installation Guidelines
Ensure all system power feeds and rack voltages are fully isolated and locked out prior to handling or mounting the 1747-L551/A processor module. Secure the 0.64 lbs module firmly into slot 0 of the primary SLC 500 chassis backplane, ensuring proper mechanical engagement and tightening the retaining screws. Terminate network cables securely to the Ethernet and RS-232 ports, ensuring that all communication cable shields are grounded properly to the cabinet earth bar to mitigate electromagnetic interference.
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Testimonials
Fast Delivery, Excellent Quality
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
We’ve worked with IndustriaX Limited on several urgent orders for automation components. Their ability to provide original, factory-sealed parts with full documentation—often from in-stock inventory—has significantly reduced our downtime. The delivery is consistently fast, and their logistics team is highly responsive. IndustriaX has become one of our most trusted global suppliers for industrial spare parts.
- Sarah Johnson
Reliable Partner for Original Parts
Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
- David Smith
Finding authentic automation parts has always been a challenge, especially for discontinued models. IndustriaX Limited has impressed us with their genuine stock, clear product traceability, and prompt updates. We’ve verified their shipments against OEM specs multiple times, and the results are flawless. They’re now our preferred sourcing partner for critical systems.
- David Smith
Professional Service with After-Sales Support"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
"IndustriaX Limited doesn’t just ship products—they provide solutions. When we encountered installation issues with one of the modules, their technical team replied in less than 4 hours and provided wiring guides and troubleshooting tips. This level of post-sale support is rare in the spare parts sector. Their professionalism gives us confidence in every order."
- Emily Brown
Trusted Source for Industrial Automation Spares
We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
- Michael Anderson
We've tested multiple suppliers over the years, but IndustriaX Limited consistently stands out. Their product catalog is extensive, their team is knowledgeable, and they understand the urgency of industrial needs. With every order, we receive timely updates, fast delivery, and 100% genuine products. It’s rare to find such consistency and reliability in this field.
- Michael Anderson