Catalogue → Allen-Bradley → SLC 500 processor (1747)
1747-L553
Allen-Bradley · PLC processor · SLC 500 processor (1747) confirmed
The Allen-Bradley 1747-L553 is a PLC processor in the SLC 500 processor (1747) range. SLC 5/05 controller, 64K, Ethernet; Discontinued but one of the highest-velocity platforms on the used market; the seed had no SLC coverage at all.
What 1747-L553 sells for
No auction result recorded for this part yet. We publish hammer prices only where we have watched a lot through to close — never an estimate in their place.
See 1747-L553 listed on eBay → Asking prices, not sold prices. We may earn a commission.
| Manufacturer | Allen-Bradley (also Rockwell Automation, AB) |
|---|---|
| Family | SLC 500 processor (1747) |
| Category | PLC processor |
| Without separators | 1747L553 |
| Notes | SLC 5/05 controller, 64K, Ethernet; Discontinued but one of the highest-velocity platforms on the used market; the seed had no SLC coverage at all.; verified: Rockwell 1747-SG001 SLC 500 selection guide |
What changes what 1747-L553 is worth
Same catalogue number, different money. These are the attributes that separate two otherwise identical 1747-L553 units — check each one before you quote or bid.
Series letter
Series letter on the label. Later series are not always backward compatible and sell for more.
Printed on the label, usually right after the catalogue number, as "SER A".
Firmware revision
Firmware/FRN revision. Buyers match it to an existing project; a mismatch can make the unit useless to them.
On the label as "FRN" or "FW", and on the module's own display if it powers up.
Tested or untested
Tested / as-is / new-in-box. The single biggest multiplier on used price.
Not on the plate. It comes from whoever pulled the unit, and it moves the price more than anything printed.
Questions
What is a 1747-L553?
The Allen-Bradley 1747-L553 is a PLC processor in the SLC 500 processor (1747) range. SLC 5/05 controller, 64K, Ethernet; Discontinued but one of the highest-velocity platforms on the used market; the seed had no SLC coverage at all.
What changes what a 1747-L553 is worth?
Two 1747-L553 units with the same catalogue number can be worth different amounts. What separates them: series letter, firmware revision, tested or untested. Series letter on the label. Later series are not always backward compatible and sell for more. Firmware/FRN revision. Buyers match it to an existing project; a mismatch can make the unit useless to them. Tested / as-is / new-in-box. The single biggest multiplier on used price.
Where do you find the series or revision on a 1747-L553?
Series letter: Printed on the label, usually right after the catalogue number, as "SER A". Firmware revision: On the label as "FRN" or "FW", and on the module's own display if it powers up. Tested or untested: Not on the plate. It comes from whoever pulled the unit, and it moves the price more than anything printed.
Who makes the 1747-L553?
Allen-Bradley makes the 1747-L553. The same equipment is sold and labelled as AB, A-B, Allen Bradley, Allen-Bradley, Rockwell, Rockwell Automation.