Supply role
Provides the separately documented power-supply position in a PLC-3 build.
Allen-Bradley · PLC-3 power supply
Allen-Bradley 1775-P1 PLC-3 Power Supply
Power-supply hardware documented for PLC-3 controller assemblies.
01
System Overview
The Allen-Bradley 1775-P1 appears in the PLC-3 quick-start component list as a power supply. The same list distinguishes the PLC-3 supply position from the processor chassis, processor, memory module and I/O scanner positions.
Within the documented PLC-3 build, 1775-P1 is named alongside 1775-P3 as the power-supply selection for PLC-3. The source separately assigns 1775-A1, 1775-A2 and 1775-A4B to the PLC-3 processor-chassis category.
The installation flow in the quick start includes an explicit power-supply installation step before the processor, memory and scanner-module installation step. This establishes the module’s hardware role in the assembly sequence without treating it as a communications or signal-scanning module.
The official record reviewed for this page does not publish voltage, current or thermal figures for 1775-P1. Those values should be taken from the unit nameplate and its matching publication revision, rather than inferred from the other listed PLC-3 supply number.
02
Configuration Reference
- Brand
- Allen-Bradley
- Product type
- PLC-3 power supply
- System family
- PLC-3
- Country of Origin
- Not stated in the reviewed official source
- PLC-3 supply listing
- 1775-P1 and 1775-P3
- PLC-3 chassis context
- 1775-A1, 1775-A2 or 1775-A4B
- Installation sequence
- Power supply installation precedes processor, memory and scanner-module installation
- Processor context
- 1775-L3 PLC-3 processor
- I/O scanner context
- 1775-S4A, S4B, S5, SR5 or SR
03
PLC-3 Assembly Context
Documented system role
PLC-3 Assembly Context
The official PLC-3 component sheet is retained as a technical reference crop. It identifies the 1775-P1/P3 power-supply line independently from the processor, memory and I/O scanner lines.
The image is an official technical-diagram crop with non-diagram page furniture removed. Selecting it opens the complete embedded diagram; its placement is fixed to the adjacent content height and does not stretch the layout.
04
Configuration Notes
Chassis relation
The PLC-3 chassis family is listed separately as 1775-A1, A2 and A4B.
Specification limit
This source does not establish electrical ratings for the P1.
05
Support Questions
A PLC-3 cabinet has lost power and the parts list mentions P1 and P3; how is 1775-P1 identified?
For 1775-P1, it is listed as a PLC-3 power supply, while 1775-P3 is a separate power-supply catalog number.
Which chassis context should be checked before a 1775-P1 power-supply change?
For 1775-P1, the PLC-3 component record names 1775-A1, 1775-A2 and 1775-A4B as the processor-chassis context.
Does 1775-P1 perform the processor or scanner function when the PLC-3 will not start?
For 1775-P1, no; it is the power-supply entry, with the processor, memory modules and I/O scanners listed as different components.
Why does the install sequence matter when rebuilding a PLC-3 around 1775-P1?
For 1775-P1, the official quick start places power-supply installation before processor, memory and scanner-module installation.
Can an electrical rating be copied from 1775-P3 onto a 1775-P1 request?
For 1775-P1, no; the reviewed quick-start source does not publish a 1775-P1 electrical rating, so the unit label and matching publication revision must be checked.
What prevents a wrong 1775-P1 replacement assignment?
For 1775-P1, record the full P1 catalog number with the installed PLC-3 chassis and supply position, rather than relying on the shared PLC-3 family name.
06
Moore Automation
Moore Automation
Industrial automation parts support
Moore Automation provides industrial automation parts for maintenance and replacement planning. Supply enquiries can be prepared with the complete manufacturer model and required quantity.
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www.mvme.cn
07
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08
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