Allen-Bradley 1747-L552 SLC 5/05 32K Controller | Replacement, Equivalent & Selection Guide
The Allen-Bradley 1747-L552 is a high-performance SLC 5/05 CPU module featuring 32K words of user memory and an integrated Ethernet (10/100 Mbps) communication port. Designed for mid-range industrial automation, it delivers reliable ladder logic execution, robust I/O management, and seamless integration within the SLC 500 modular platform. This selection guide helps engineers identify compatible replacements, equivalent models, and system-fit alternatives.
Technical Specifications
| Parameter | Specification |
|---|---|
| Catalog Number | 1747-L552 |
| Series | SLC 500 — SLC 5/05 CPU |
| User Memory | 32K Words |
| Communication Port | Ethernet 10/100 Mbps (RJ-45) + RS-232 (Channel 0) |
| Supported Protocols | EtherNet/IP, DF1, DH-485, ASCII |
| Max I/O Points | 4,096 discrete / 960 analog |
| Scan Time | ~1 ms/K (typical) |
| Power Supply Requirement | SLC 500 chassis power supply (e.g., 1746-P2, 1746-P4) |
| Operating Temperature | 0 °C to 60 °C |
| Weight | 450 g (approx.) |
| Dimensions (H × W × D) | Standard SLC 500 single-slot module |
| Certifications | UL, CE, CSA |
Compatible Replacement & Equivalent Models
When the 1747-L552 is unavailable or end-of-life, the following models offer compatible or equivalent functionality. Always verify firmware, memory, and communication requirements before substitution.
| Model | Memory | Communication | Notes |
|---|---|---|---|
| 1747-L551 | 16K Words | Ethernet + RS-232 | Lower memory; same SLC 5/05 platform |
| 1747-L553 | 64K Words | Ethernet + RS-232 | Higher memory upgrade path |
| 1747-L541 | 16K Words | DH+ + RS-232 | SLC 5/04; no Ethernet — protocol change required |
| 1747-L543 | 64K Words | DH+ + RS-232 | SLC 5/04 high-memory alternative |
| 1756-L71 (ControlLogix) | 2 MB+ | EtherNet/IP | Platform migration; requires program conversion |
| 1769-L30ER (CompactLogix) | 1 MB | EtherNet/IP | Modern compact alternative; program conversion needed |
⚠ Note: Cross-platform replacements (SLC → Logix) require program re-engineering. Contact our technical team for migration support.
Why Choose the Original Model
- Proven SLC 5/05 Architecture: Decades of field-proven reliability in discrete and process manufacturing environments.
- Native Ethernet Connectivity: Built-in EtherNet/IP port eliminates the need for additional communication modules, reducing BOM cost.
- 32K Memory Sweet Spot: Sufficient for complex ladder logic programs without the cost premium of 64K variants.
- Broad I/O Compatibility: Supports the full SLC 500 I/O library — discrete, analog, specialty, and remote I/O.
- RSLogix 500 Programming: Fully supported by Rockwell Automation’s RSLogix 500 / Studio 5000 Logix Designer (legacy mode).
- Spare Parts Availability: Konmask maintains verified stock of new, refurbished, and tested units to support legacy system maintenance.
Typical Applications
- Automotive assembly line control and sequencing
- Food & beverage packaging and conveyor systems
- Water/wastewater treatment plant automation
- HVAC and building management systems
- Pharmaceutical batch processing
- Material handling and warehouse automation
- Oil & gas upstream/downstream process control
- Legacy system maintenance and life extension projects
System Compatibility
| Component Category | Compatible Part Numbers |
|---|---|
| Chassis | 1746-A4, 1746-A7, 1746-A10, 1746-A13 |
| Power Supplies | 1746-P1, 1746-P2, 1746-P3, 1746-P4, 1746-P7 |
| Discrete I/O | 1746-IB16, 1746-OB16, 1746-IA16, 1746-OA16 |
| Analog I/O | 1746-NI4, 1746-NO4I, 1746-NI8, 1746-NI16I |
| Communication Modules | 1747-SDN (DeviceNet), 1747-SCNR (ControlNet) |
| Programming Software | RSLogix 500 v8.x+, RSLinx Classic |
| HMI | PanelView 300–1000, PanelView Plus (via EtherNet/IP) |
Selection Guide
Use the decision matrix below to identify the right SLC 5/05 CPU for your application:
| Requirement | Recommended Model |
|---|---|
| Ethernet connectivity + 16K memory | 1747-L551 |
| Ethernet connectivity + 32K memory ✓ | 1747-L552 (This Product) |
| Ethernet connectivity + 64K memory | 1747-L553 |
| DH+ network + 32K memory | 1747-L542 |
| Modern platform migration (EtherNet/IP) | 1769-L30ER or 1756-L71 |
| Budget-sensitive legacy replacement | Refurbished 1747-L552 (tested & warranted) |
Quality Assurance & Sourcing
- Verified Supply Chain: All units sourced from authorized distributors, OEM surplus, or certified refurbishers — never grey-market or counterfeit channels.
- 4-Step Inspection: Visual inspection → functional power-on test → communication port verification → firmware version confirmation.
- Warranty: 90-day replacement warranty on all tested units; 12-month warranty on new-in-box stock.
- Traceability: Lot documentation and serial number records available upon request for regulated industries.
- Packaging: ESD-safe anti-static bags, foam-lined cartons, and moisture barrier packaging for international shipments.
How to Order
- Confirm Part Number: Verify catalog number 1747-L552 matches your existing system documentation or nameplate.
- Specify Condition: New-in-box, factory-refurbished (tested), or used (as-is) — contact us for current stock and pricing.
- Request a Quote: Email support@konmask.com with quantity, required delivery date, and destination country.
- Confirm Lead Time: In-stock orders typically ship within 1–3 business days; sourced orders within 5–10 business days.
- Receive & Verify: Inspect upon receipt. Our team provides post-delivery technical support at no additional charge.
Replacement & Compatibility FAQ
Q: Can I directly replace a 1747-L552 with a 1747-L553?
A: Yes — the 1747-L553 is a drop-in hardware replacement with 64K memory. Your existing program will run without modification, provided it fits within 32K. No wiring or chassis changes are required.
Q: Is the 1747-L552 compatible with ControlLogix chassis?
A: No. The 1747-L552 is designed exclusively for SLC 500 chassis (1746-Axxx series). ControlLogix uses the 1756 platform with a different backplane architecture.
Q: Can I use RSLogix 5000 / Studio 5000 to program the 1747-L552?
A: No. The 1747-L552 requires RSLogix 500. Studio 5000 is for Logix5000 controllers (ControlLogix, CompactLogix) only.
Q: What is the difference between SLC 5/04 and SLC 5/05?
A: The SLC 5/05 (1747-L55x) adds a built-in Ethernet port versus the SLC 5/04 (1747-L54x) which uses DH+ as its primary network. If your system requires Ethernet/IP connectivity, the SLC 5/05 is the correct platform.
Q: Do you supply firmware upgrade support?
A: We can advise on firmware compatibility and supply units with specific firmware versions where available. Contact our technical team with your current firmware version and requirements.
Q: What warranty do refurbished units carry?
A: All refurbished units sold by Konmask carry a 90-day replacement warranty. Extended warranty options are available — please inquire at time of order.
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