Allen-Bradley / Rockwell · SLC 500 · PLC CPU

Allen-Bradley / Rockwell 1747-L553

DiscontinuedMEDIUM

What should replace this part?

Your options

Our analysisFull migration to CompactLogix 5380

OEM migration profile routes SLC 500 to CompactLogix 5380; no single catalog is stated, so the 5069 bill of materials must be engineered.

Our analysisPhased retention with 1747-AENTR

Adapter retains SLC I/O remotely while the processor moves; a staged path that defers rewiring.

Our analysisRepair the original

OEM page flags repairable with repair services linked; a bridge while migration is scoped.

Replacement analysis

Original: 1747-L553 (SLC 5/05 64K processor DH+/Ethernet)

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Replacement: CompactLogix 5380 platform (5069 family; no 1:1 catalog)

Relationship: Modern platform migration (not a swap) MEDIUM

Migration / engineering work required — not a drop-in. This is not presented as a drop-in replacement.

Analyst note: OEM exact page fetched. Migration platform-level (MIGRAT-PP004); 1747-AENTR phased-retention option.

What changes?

Hardware	1746 chassis converts to the 5069 platform; power and capacity planning change.
Software	RSLogix 500 converts to Studio 5000 Logix Designer.
Wiring	Rewiring or 1492 conversion hardware; phased option keeps SLC I/O remotely via 1747-AENTR.

Anything not listed here is unknown — the evidence does not establish it.

Can I still buy the original?

Repair: Verified — see evidenceUsed: Unknown — not verifiedRefurbished: Unknown — not verified

New-original availability is not claimed unless evidence supports it. Availability is never implied by the existence of a listing alone.

Lifecycle

Status: Discontinued

Discontinuation date: 2024-03-31

Lifecycle source

Evidence

Every important claim traces to a source below. OEM source means the manufacturer published it; third-party source means a distributor, repair company or reseller states it; our analysis connects them — and is labeled as such.

OEM / manufacturer sources

OEM source HIGH Rockwell Automation · Tier A · 2026-09-10

SLC 5/05 64K discontinued as of 2024-03-31; Engineering Replacement; repairable

“Rockwell Automation announces that as of March 31, 2024, the SLC 5/05 64K Controller will be discontinued and no longer available for sale.”

Establishes: modern_platform_migration · View source · Note: Fetched exact model page

OEM source MEDIUM Rockwell Automation · Tier A

SLC 500 to CompactLogix 5380 migration profile; 1747-AENTR phased I/O retention

“Plan now to lower risk... with SLC 500 to CompactLogix 5380 control system migration.”

Establishes: modern_platform_migration · View source · Note: Platform-level not L553-to-single-catalog

Why you might be searching this

SLC 5/05 unsupported since 2024; rip-and-replace or phased retention?

Related replacement analyses

Allen-Bradley / Rockwell 1746-IB16 — Same family: SLC 500
Allen-Bradley / Rockwell 1785-L80B — Same plc cpu line

Need help deciding between repair, replacement, or migration?

Request a replacement review for 1747-L553 — repair assessment, sourced original, replacement quote, or migration scoping.

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Research status: done. Confidence MEDIUM reflects the evidence above, not marketing. Commercial paths: Migration scoping · CompactLogix 5380 quote · Repair bridge. No search-volume, pricing or revenue claims are made on this page.