Purchase now: Allen Bradley 1747-L553 SLC 5/05 Processor
Purchase now: Atlantechdrives provides you the 1747-L553, the undisputed flagship processor of the Allen Bradley SLC 500 automation family. Engineered for massive, enterprise-level industrial applications, this processor provides the maximum allowable 64,000 words (64K) of memory on the 1746 platform. Combined with its native high-speed Ethernet/IP port, the 1747-L553 acts as a centralized data hub, capable of controlling vast local I/O chassis while simultaneously managing complex communication arrays with dozens of remote HMIs, SCADA servers, and subsidiary PLCs. It is strictly deployed in mission-critical environments such as large power generation stations, extensive automotive lines, and sprawling chemical processing plants where data bottlenecks are unacceptable.
Technical Specifications of the 1747-L553
Beyond massive memory and Ethernet capabilities, the 1747-L553 provides advanced memory mapping, allowing programmers to execute heavy mathematical algorithms without running out of data table overhead. It natively supports up to 64 simultaneous Ethernet connections (on newer series).
- Part Number: 1747-L553
- Processor Class: SLC 5/05 CPU (Maximum Capacity)
- Total User Memory: 64K Words (Instructions and Data)
- Channel 1 Port: Ethernet/IP (RJ45, 10/100 Mbps Auto-negotiate)
- Channel 0 Port: RS-232 (Supports DF1, ASCII, User Mode)
- Embedded Feature: Built-in Web Server
- Maximum Local I/O Capacity: 4096 inputs / 4096 outputs
- Backplane Current Draw: 1.0 Amps at 5V DC
Expert Tips: Unleashing the Embedded Web Server
The 1747-L553 features an incredible, often overlooked diagnostic tool: an embedded HTTP web server. Expert Tip: By typing the IP address of the processor directly into a standard web browser (like Chrome or Edge), you can access the module’s diagnostic pages. You can view Ethernet port statistics, check for connection timeouts, and verify processor utilization without ever opening RSLogix 500. Furthermore, using the «Data Table Memory Map» feature, you can configure custom HTML pages that allow plant managers to securely view live production data (like tank levels or part counts directly from the N7 or F8 data files) on their office PCs or tablets, acting as a lightweight, free SCADA alternative.
Maintenance and Environmental Protections
As the most expensive component in the SLC chassis, protecting the 1747-L553 is paramount. Always ensure the front protective plastic door (1746-R14) is securely attached to prevent electrostatic discharge (ESD) from damaging the exposed Ethernet and serial communication ports. Additionally, with 64K of logic executing continuously, the processor relies heavily on stable 5V DC backplane power. Ensure your chassis power supply (1746-P4) is adequately ventilated and free of conductive dust. To prevent catastrophic program loss, change the internal 1747-BA battery every 2 years while the power remains ON.
Frequently Asked Questions (FAQs)
Q: Is the 1747-L553 backward compatible with older SLC 5/01 or 5/03 programs?
A: Yes. You can easily migrate a program from an older, lower-memory SLC processor into the 1747-L553 using RSLogix 500. You will just need to update the hardware configuration to match the 5/05 CPU and configure the new Ethernet IP settings.
Q: How do I reset the IP address if I lose the password or the network settings are unknown?
A: To factory reset the processor (which will wipe the IP address back to BOOTP mode and erase the 64K logic program), you must remove the processor from the chassis, disconnect the internal lithium battery, and short the VBB and GND pins on the motherboard for 60 seconds.
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For the most demanding Ethernet-based SLC applications, the 64KB SLC 5/05 is the premier processor for the 1746-A10 chassis.
