Catalogue → Allen-Bradley → ControlLogix 1756 I/O
1756-OB16D
Allen-Bradley · PLC I/O module · ControlLogix 1756 I/O confirmed
The Allen-Bradley 1756-OB16D is a PLC I/O module in the ControlLogix 1756 I/O range. 16-point 24VDC output, diagnostic.
What 1756-OB16D 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 1756-OB16D listed on eBay → Asking prices, not sold prices. We may earn a commission.
| Manufacturer | Allen-Bradley (also Rockwell Automation, AB) |
|---|---|
| Family | ControlLogix 1756 I/O |
| Category | PLC I/O module |
| Without separators | 1756OB16D |
| Notes | 16-point 24VDC output, diagnostic |
What changes what 1756-OB16D is worth
Same catalogue number, different money. These are the attributes that separate two otherwise identical 1756-OB16D 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".
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 1756-OB16D?
The Allen-Bradley 1756-OB16D is a PLC I/O module in the ControlLogix 1756 I/O range. 16-point 24VDC output, diagnostic.
What changes what a 1756-OB16D is worth?
Two 1756-OB16D units with the same catalogue number can be worth different amounts. What separates them: series letter, tested or untested. Series letter on the label. Later series are not always backward compatible and sell for more. Tested / as-is / new-in-box. The single biggest multiplier on used price.
Where do you find the series or revision on a 1756-OB16D?
Series letter: Printed on the label, usually right after the catalogue number, as "SER A". 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 1756-OB16D?
Allen-Bradley makes the 1756-OB16D. The same equipment is sold and labelled as AB, A-B, Allen Bradley, Allen-Bradley, Rockwell, Rockwell Automation.