PRODUCT INFORMATION
Product Overview
Revision scope: These specifications describe 1756-PA75R/A (Series A). Check the corresponding technical data before specifying another hardware series.
The Allen-Bradley 1756-PA75R is a redundant AC power supply module. It is built for ControlLogix chassis installations. The unit operates across an input voltage range of 85 to 265 V AC. Its nominal input frequencies span 47 to 63 Hz. Nominal operating voltages include 120 V AC and 240 V AC. The module delivers 75 W of direct-current backplane power from 0 to 60 °C.
This supply module distributes four regulated direct-current rails to the chassis backplane. It delivers 1.5 A at 1.2 V and 4 A at 3.3 V DC. It also supplies 13 A at 5.1 V and 2.8 A at 24 V DC. Hold-up time reaches two cycles at 60 Hz after an input power loss. Maximum inrush current is limited to 20 A at power-up.
TECHNICAL DATA
Technical Specifications
These specifications describe 1756-PA75R/A (Series A). Check the corresponding technical data before specifying another hardware series.
| Parameter | Specification |
|---|
| Input Voltage Range | 85–265 V AC (nominal 120/240 V AC, 47–63 Hz) |
|---|
| Output Power | 75 W @ 0–60 °C (32–140 °F) |
|---|
| Backplane DC Output Currents | 1.5 A @ 1.2 V; 4 A @ 3.3 V; 13 A @ 5.1 V; 2.8 A @ 24 V DC |
|---|
| Max Inrush Current | 20 A (at power-up) |
|---|
| Hold-Up Time (after input loss) | 2 cycles @ 60 Hz (typical) |
|---|
| Chassis Compatibility | 1756-A4, A7, A10, A13, A17 (Series B/C ControlLogix chassis) |
|---|
TECHNICAL INFORMATION
Order Information
| Revision Part # | Also known as | Reference Price |
|---|
| 1756-PA75R Ser A | 1756-PA75R/A, Series A | USD 429.00–928.00, indicative |
Reference prices are observed third-party market prices for the stated revision, not a final Aituos quotation.
TECHNICAL INFORMATION
Features
- Provides 75 W continuous backplane output power between 0 and 60 °C.
- Accepts wide input voltage from 85 to 265 V AC at 47 to 63 Hz.
- Supplies regulated DC rails at 1.2 V, 3.3 V, 5.1 V, and 24 V.
- Offers typical hold-up time of two cycles at 60 Hz during input interruption.
- Limits maximum initial power-up inrush current to 20 A.
TECHNICAL INFORMATION
Applications
- Redundant AC power supply configurations in ControlLogix chassis environments.
- Dual-source AC power backup setups for continuous backplane DC distribution.
- Automation racks requiring high-availability backplane power stability.
TECHNICAL INFORMATION
Connections / Interfaces
- AC input terminal connections accept field power wiring from 85 to 265 V AC.
- ControlLogix backplane connector routes four regulated direct-current voltage lines.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module onto the dedicated power position of the supported chassis.
- Disconnect all incoming AC supply power before wiring the terminal block.
- Maintain cabinet ventilation to ensure operating ambient temperatures remain below 60 °C.
TECHNICAL INFORMATION
Configuration Guidelines
- Calculate total module DC load across the four voltage rails before commissioning.
- Verify total backplane consumption remains at or below the 75 W limit.
- Balance chassis module current draw against the individual backplane rail ratings.
TECHNICAL INFORMATION
Compatibility
- Compatible with Series B and Series C 1756-A4 ControlLogix chassis.
- Compatible with Series B and Series C 1756-A7 and 1756-A10 chassis.
- Compatible with Series B and Series C 1756-A13 and 1756-A17 chassis.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- The Series A hardware revision carries catalog designation 1756-PA75R/A.
- Maintain matched redundant power supply units within redundant ControlLogix configurations.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Series B and Series C 1756-A4 ControlLogix chassis. Compatible with Series B and Series C 1756-A7 and 1756-A10 chassis. Compatible with Series B and Series C 1756-A13 and 1756-A17 chassis.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What is the primary function of the 1756-PA75R?
It provides redundant AC-to-DC power for compatible Allen-Bradley ControlLogix chassis backplanes.
Which ControlLogix chassis models support this power supply?
It supports 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 Series B and C chassis.
What are the backplane DC output ratings of the 1756-PA75R?
The module outputs 1.5 A at 1.2 V and 4 A at 3.3 V DC. It also outputs 13 A at 5.1 V and 2.8 A at 24 V DC.
What is the market reference price for the 1756-PA75R?
Observed market reference pricing spans USD 429.00 to 928.00 depending on unit condition. These figures are indicative market reference pricing only and are not a final quotation.
