Catalogue → Allen-Bradley → CompactLogix 1769 controller
1769-L31
Allen-Bradley · PLC processor · CompactLogix 1769 controller confirmed
The Allen-Bradley 1769-L31 is a PLC processor in the CompactLogix 1769 controller range.
What 1769-L31 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 1769-L31 listed on eBay → Asking prices, not sold prices. We may earn a commission.
| Manufacturer | Allen-Bradley (also Rockwell Automation, AB) |
|---|---|
| Family | CompactLogix 1769 controller |
| Category | PLC processor |
| Without separators | 1769L31 |
| Notes | verified from CompactLogix and Compact GuardLogix Systems Selection Guide (1769-sg003) |
What changes what 1769-L31 is worth
Same catalogue number, different money. These are the attributes that separate two otherwise identical 1769-L31 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 1769-L31?
The Allen-Bradley 1769-L31 is a PLC processor in the CompactLogix 1769 controller range.
What changes what a 1769-L31 is worth?
Two 1769-L31 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 1769-L31?
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 1769-L31?
Allen-Bradley makes the 1769-L31. The same equipment is sold and labelled as AB, A-B, Allen Bradley, Allen-Bradley, Rockwell, Rockwell Automation.