Overview
Manuals
Chassis Power
Backplane Load
Installation Check
Features:
- ControlLogix 1756 identity: 1756-PA75 is the documented non-redundant AC chassis power supply.
- Power conversion: Accepts 120/240 V AC nominal input and provides 1.2 V, 3.3 V, 5.1 V and 24 V DC backplane rails with 75 W maximum total output.
- Verification focus: Confirm catalog number, hardware series, chassis type, calculated backplane load, branch protection and protective-earth wiring before replacement.
Allen-Bradley 1756-PA75 is a ControlLogix AC chassis power supply designed for 120/240 V AC nominal input. It converts the incoming supply into regulated 1.2 V, 3.3 V, 5.1 V and 24 V DC rails for the ControlLogix backplane, with 75 W maximum total output. The catalog identity distinguishes this standard, non-redundant supply from coated, redundant and DC-input variants, so the complete nameplate and installed chassis loading should be checked for replacement.
The technical content for 1756-PA75 is limited to the current Rockwell Automation product page and publications 1756-IN619 and 1756-TD005. Final compatibility depends on the ControlLogix chassis, hardware series, input source, available rail current, total backplane load, branch protection and protective-earth connection.
The Allen-Bradley 1756-PA75 ControlLogix AC power supply is supported by Moore Automated for verified industrial replacement and spare-part requirements.
Allen-Bradley 1756-PA75 documentation and product resources.
Important Notice: Confirm the complete catalog number, hardware revision and required controlled-document revision before replacement.
The supply converts the documented AC source into the regulated backplane rails required by the installed ControlLogix modules. Confirm the calculated rack load remains within every rail limit and the 75 W total.
Check the 24 V, 5.1 V, 3.3 V and 1.2 V current demand for the complete chassis. A valid total-watt figure does not override an individual rail-current limit.
De-energize the chassis, verify input voltage and branch protection, retain protective-earth and terminal torque requirements, then confirm the power and module-status indicators after restart.
