EquipVector
Evidence-backed decisions for obsolete industrial parts

Allen-Bradley / Rockwell · SLC 500 · PLC CPU · SLC 5/05 Ethernet processor

Allen-Bradley / Rockwell 1747-L552

Discontinued

Analysis reviewed: September 11, 2026

What should replace this part?

The documented replacement is CompactLogix 5380 platform (5069 family; no 1:1 catalog). This is a platform migration, not a drop-in swap.

Move to CompactLogix 5380 in stages — repair or retained I/O covers the changeover

Your options

Move to CompactLogix 5380
Rockwell's migration profile moves SLC 500 to CompactLogix 5380. There is no single catalog swap, so the new 5069 system needs sizing and configuration for your application.
Keep the SLC I/O running with 1747-AENTR
The 1747-AENTR adapter replaces the SLC processor so the existing chassis works as EtherNet/IP remote I/O under the new controller. Rewiring can wait for a later step.
Repair the original
Repair shops quote this exact model on request. Useful cover while you plan the migration.

What will need to change?

HardwareThe 1746 chassis gives way to the 5069 platform. Replan power and capacity for the new rack.
SoftwareMove the program from RSLogix 500 to Studio 5000 Logix Designer and revalidate the application.
WiringEither rewire for the new I/O or use 1492 conversion hardware. The AENTR path keeps existing SLC I/O connected remotely instead.

For anything not listed here, check the replacement manual against your existing configuration.

Need help confirming this replacement?

Send us the part number and current setup for 1747-L552. We'll help determine whether you need a replacement, repair, original-stock sourcing, or a migration.

Request a replacement review

Can I still buy the original?

Repair — Not confirmed for this exact modelUsed — Not confirmed for this exact modelRefurbished — Not confirmed for this exact model

We did not verify current new-original stock for this exact part.

Lifecycle

Status: Discontinued

Discontinuation date: March 31, 2024

Lifecycle source · rockwellautomation.com

Technical evidence

The recommendation above is based on the sources listed here. OEM source means the manufacturer published it; third-party source means a distributor, repair company or reseller states it. Confidence reflects how directly those sources support the recommendation: High — directly supported by manufacturer documentation. Medium — supported by family-level, secondary, or otherwise less-direct evidence. Low — limited or indirect evidence; verify independently before ordering.

OEM / manufacturer sources

OEM source Confidence: Medium Rockwell Automation (OEM app profile 5069-AP001)
The 1747-AENTR replaces the SLC processor so the chassis serves as EtherNet/IP remote I/O under a Logix controller.
Source excerpt“1747-AENTR enables CompactLogix/ControlLogix to control SLC I/O via EtherNet/IP”
View source · Note: Check per-module firmware notes in the profile before relying on this path.

Third-party sources

Third-party source Confidence: Medium Industrial Monitor Direct (independent technical publisher) · 2026-09-09
Rockwell removed the SLC 5/05 family (L551/L552/L553) from sale on 2024-03-31, with repair support committed for about 7 years to around 2031.
Source excerpt“Removed from sale March 31 2024; repair support committed through ~March 31 2031”
View source · Note: Family-level dates. The per-model memory split is not covered here.

Limitation: Direction comes from Rockwell's platform-level migration profile, not an L552 catalog. Repair is quoted per request, so line up the quote early.

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