Allen-Bradley 1747-L553/C SLC 5/05 Processor | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1747-L553/C is a high-performance SLC 5/05 series processor from Rockwell Automation, featuring built-in Ethernet/IP communication for seamless integration into modern industrial control networks. Designed for demanding manufacturing and process automation environments, this processor delivers reliable execution with extensive I/O capacity and broad compatibility across the SLC 500 platform.
Technical Specifications
| Parameter | Specification |
|---|---|
| Catalog Number | 1747-L553/C |
| Series | SLC 5/05 |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Communication Port | Built-in Ethernet/IP (10/100 Mbps), RS-232 (DH-485) |
| User Memory | 64K Words |
| Max I/O Points | 4,096 digital I/O |
| Max I/O Chassis | 3 chassis (local + 2 extended) |
| Scan Time | ~1 ms/K (typical) |
| Power Supply Voltage | Supplied by SLC 500 chassis power supply |
| 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) |
| Programming Software | RSLogix 500 / Studio 5000 Logix Designer (offline) |
| Firmware Revision | Series C |
| Certifications | UL, CE, CSA |
| Weight | Approx. 300 g |
Compatible Replacement & Equivalent Models
When the 1747-L553/C is unavailable or end-of-life, the following models offer functional equivalence or direct drop-in replacement capability:
| Model | Series | Memory | Communication | Compatibility Notes |
|---|---|---|---|---|
| 1747-L553/C (this unit) | SLC 5/05 | 64K | Ethernet/IP + DH-485 | Original |
| 1747-L552/C | SLC 5/05 | 32K | Ethernet/IP + DH-485 | Lower memory; same platform |
| 1747-L551/C | SLC 5/05 | 16K | Ethernet/IP + DH-485 | Entry-level SLC 5/05 |
| 1747-L543/C | SLC 5/04 | 64K | DH+ only | No Ethernet; DH+ network required |
| 1747-L533/C | SLC 5/03 | 16K | DH-485 only | Reduced capability; legacy replacement |
| 1769-L30ER (CompactLogix) | CompactLogix 5370 | 1 MB | Ethernet/IP | Modern migration path; requires program conversion |
| 1769-L33ER (CompactLogix) | CompactLogix 5370 | 2 MB | Ethernet/IP | Recommended upgrade for new projects |
Note: Program conversion from SLC 500 to CompactLogix requires RSLogix 500 and Studio 5000. Konmask can assist with migration planning.
Why Choose the Original Model
- Drop-in compatibility: Fits directly into any SLC 500 modular chassis (1746-A4, A7, A10, A13) without hardware modification.
- Ethernet/IP native: Enables direct integration with SCADA, HMI, and MES systems over standard TCP/IP networks — no additional communication modules required.
- 64K user memory: The largest memory option in the SLC 5/05 family, supporting complex ladder logic programs with extensive data tables.
- Proven reliability: Decades of field-proven performance in automotive, food & beverage, water treatment, and discrete manufacturing.
- Broad I/O support: Compatible with the full range of 1746 I/O modules including analog, digital, specialty, and safety modules.
- Long-term parts availability: Konmask maintains stock of new, refurbished, and tested units to support legacy system maintenance.
Typical Applications
- Automotive assembly line control and conveyor management
- Food & beverage packaging and batch processing
- Water and wastewater treatment plant automation
- HVAC and building management systems
- Pharmaceutical manufacturing and clean-room control
- Material handling, palletizing, and sortation systems
- Oil & gas upstream and midstream process control
- Legacy system maintenance and life extension projects
System Compatibility
- Chassis: 1746-A4 (4-slot), 1746-A7 (7-slot), 1746-A10 (10-slot), 1746-A13 (13-slot)
- Power Supplies: 1746-P1, P2, P3, P4, P7 series
- I/O Modules: Full 1746 I/O family — digital, analog, thermocouple, RTD, high-speed counter, DeviceNet scanner
- Programming Software: RSLogix 500 v8.0 and above (Windows 7/10/11 compatible)
- Communication: EtherNet/IP (port 44818), MSG instruction to ControlLogix/CompactLogix, PCCC protocol support
- HMI: PanelView, PanelView Plus, FactoryTalk View SE/ME, third-party HMI via Ethernet/IP or Modbus TCP gateway
Selection Guide
Use the following criteria to select the correct SLC 5/05 processor for your application:
| Requirement | Recommended Model |
|---|---|
| Ethernet/IP + 64K memory (maximum capacity) | 1747-L553/C ✓ (this unit) |
| Ethernet/IP + 32K memory (mid-range) | 1747-L552/C |
| Ethernet/IP + 16K memory (entry-level) | 1747-L551/C |
| DH+ network only, 64K memory | 1747-L543/C (SLC 5/04) |
| New project with modern architecture | 1769-L33ER CompactLogix (migration) |
| Replacement for failed unit, same chassis | 1747-L553/C (direct swap) |
Key decision factors: network protocol (Ethernet/IP vs. DH+), required user memory, I/O count, and whether a like-for-like replacement or platform migration is preferred.
Quality Assurance & Sourcing
- Source verification: All units sourced from authorized distributors, certified resellers, or directly from Rockwell Automation supply chains.
- Inspection protocol: Each unit undergoes visual inspection, firmware version verification, and functional power-on testing before shipment.
- Condition options: New (factory sealed), Refurbished (tested & certified), and Used (tested, as-is) — clearly labeled on each listing.
- Warranty: 12-month warranty on new units; 90-day warranty on refurbished units. Extended warranty available on request.
- Counterfeit prevention: Konmask does not source from unverified grey-market channels. All units include traceable documentation.
- Export compliance: Units shipped in compliance with applicable export control regulations (EAR/ECCN).
How to Order
- Confirm your catalog number: Verify the exact part number (1747-L553/C) from your existing hardware label or system documentation.
- Specify condition: Choose New, Refurbished, or Used based on your budget and application criticality.
- Add to cart and proceed to checkout, or contact us for bulk pricing and lead time confirmation.
- Provide shipping details: Include your delivery address and any special freight requirements (e.g., ESD-safe packaging, expedited shipping).
- Receive order confirmation: You will receive a proforma invoice and tracking number within 1 business day of order placement.
For urgent requirements or large-quantity orders, contact our technical sales team directly at support@konmask.com or call +0086 19859288691.
Replacement & Compatibility FAQ
Q: Can I replace a 1747-L553/B with a 1747-L553/C?
A: Yes. Series C is backward compatible with Series B. The /C revision includes firmware improvements and is a direct drop-in replacement. No program changes are required.
Q: Will my existing SLC 500 program run on a 1747-L553/C without modification?
A: Yes, provided the program was written for SLC 5/05 and the memory usage is within 64K words. Back up your program via RSLogix 500 before swapping the processor.
Q: Can I use the 1747-L553/C in a fixed SLC 500 chassis?
A: No. The 1747-L553/C is a modular processor and requires a modular SLC 500 chassis (1746-Axx series). It is not compatible with fixed SLC 500 controllers (e.g., 1747-L20, L30, L40).
Q: What is the difference between 1747-L553/C and 1747-L552/C?
A: The primary difference is user memory: 64K words (L553) vs. 32K words (L552). Both share the same Ethernet/IP communication capability and chassis compatibility.
Q: Is the 1747-L553/C still in production?
A: The SLC 500 platform has reached end-of-life status with Rockwell Automation. Konmask maintains inventory of new and refurbished units to support ongoing maintenance needs. For new projects, we recommend migrating to CompactLogix.
Q: Can I connect the 1747-L553/C directly to a PC for programming?
A: Yes. Connect via Ethernet using RSLinx Classic and RSLogix 500. Alternatively, use the RS-232 port with a 1747-CP3 cable for direct serial connection.
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