Genuine PLC 1756-PA75 ControlLogix - Industrial Automation Part

AB | 1756-PA75 | ControlLogix AC Power Supply

SKU: 1756-PA75 Category: Allen-Bradley

Description

Allen-Bradley 1756-PA75 ControlLogix AC Power Supply | Replacement, Equivalent & Selection Guide

The Allen-Bradley 1756-PA75 is a high-performance AC power supply module designed for the Rockwell Automation ControlLogix platform. It delivers stable, regulated DC power to the ControlLogix chassis backplane, supporting mission-critical industrial automation systems. This page provides full technical specifications, compatible replacement models, application guidance, and sourcing information to help engineers and procurement teams make confident selection decisions.

Technical Specifications

Manufacturer: Allen-Bradley / Rockwell Automation
Part Number: 1756-PA75
Series: ControlLogix
Input Voltage: 85–265 VAC, 47–63 Hz
Output Power: 75 W (backplane)
Output Voltage: 5.1 VDC (backplane), 1.2 VDC (auxiliary)
Output Current: 13 A @ 5.1 VDC; 0.8 A @ 1.2 VDC
Auxiliary Output: 24 VDC, 0.8 A (field-side power)
Chassis Compatibility: 1756-Axx ControlLogix chassis (4, 7, 10, 13, 17-slot)
Operating Temperature: 0–60 °C
Storage Temperature: -40–85 °C
Relative Humidity: 5–95% (non-condensing)
Dimensions (H × W × D): 147 × 45 × 144 mm (approx.)
Weight: ~1.0 kg
Certifications: UL, CE, cUL
Catalog Number: 1756-PA75 / Series B

Compatible Replacement & Equivalent Models

The following models are commonly evaluated as replacements or equivalents for the 1756-PA75. Always verify electrical and mechanical compatibility before substitution.

1756-PA75R — Redundant version of the PA75; drop-in for redundancy-enabled chassis configurations
1756-PB75 — DC input equivalent (18–32 VDC); same 75 W output, suitable when AC input is unavailable
1756-PB75R — Redundant DC input variant; mirrors PA75R functionality on DC supply
1756-PA72 — Lower-power predecessor (72 W); compatible in most non-peak-load applications
1756-PA16 — 16 W supply for smaller chassis; not a direct replacement but suitable for 4-slot chassis with light I/O loads
Third-party equivalents — Some aftermarket suppliers offer 1756-PA75-compatible units; Konmask.com supplies OEM-grade and verified-compatible modules only

Note: Rockwell Automation does not officially endorse third-party replacements. Consult your system integrator or Konmask.com for sourcing guidance.

Why Choose the Original 1756-PA75

Guaranteed compatibility with all 1756-series ControlLogix chassis and modules
Rockwell-validated firmware and diagnostics integration via RSLogix 5000 / Studio 5000
Proven MTBF in continuous industrial environments (24/7 operation)
Full warranty support and Rockwell TechConnect eligibility
Hot-swap capable when used with redundant power supply configurations (1756-PA75R)
Consistent backplane power quality — critical for high-density I/O and motion control modules

Typical Applications

Automotive assembly line control systems
Oil & gas pipeline SCADA and DCS integration
Water/wastewater treatment plant automation
Pharmaceutical batch processing (21 CFR Part 11 environments)
Food & beverage packaging line control
Power generation and utility substation automation
Mining and material handling conveyor systems
Building management and HVAC control panels

System Compatibility

Chassis: 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17
Controllers: 1756-L6x, 1756-L7x, 1756-L8x series (ControlLogix 5560/5570/5580)
Communication modules: 1756-EN2T, 1756-EN3TR, 1756-DHRIO, 1756-CN2
I/O modules: All 1756-series digital and analog I/O
Motion modules: 1756-M02AE, 1756-M08SE and compatible servo drives
Software: RSLogix 5000 v16+, Studio 5000 Logix Designer v21+
Redundancy: Compatible with 1756-SRM redundancy module when paired with 1756-PA75R

Selection Guide

Use the following criteria to determine whether the 1756-PA75 is the right power supply for your application:

Step 1 — Calculate chassis power demand: Sum the backplane current draw of all installed modules. The 1756-PA75 supports up to 13 A @ 5.1 VDC. If total demand exceeds this, consider dual-supply or a higher-capacity chassis.
Step 2 — Confirm input voltage: If your panel supplies AC (85–265 VAC), the PA75 is correct. For DC-only panels, select the 1756-PB75 instead.
Step 3 — Assess redundancy requirements: For SIL-rated or high-availability systems, select the 1756-PA75R (redundant) variant.
Step 4 — Verify chassis slot: The power supply occupies the leftmost slot of the 1756 chassis. Confirm your chassis model is 1756-Axx series.
Step 5 — Check auxiliary output needs: If field devices require 24 VDC auxiliary power from the supply, confirm load does not exceed 0.8 A.

Quality Assurance & Sourcing

All 1756-PA75 units supplied by Konmask.com are sourced from authorized distribution channels or verified surplus with full traceability
Each unit undergoes incoming inspection: visual check, label verification, and functional power-on test where applicable
Anti-counterfeit measures: holographic labels, serial number verification against Rockwell databases
Packaging: ESD-safe bags, foam-lined cartons, moisture barrier where required
Lead time: In-stock units ship within 1–3 business days; sourced units within 5–10 business days
Export compliance: ECCN EAR99; no export license required for most destinations

How to Order

Online: Add to cart directly on this page — select quantity and proceed to checkout
RFQ / Bulk: Email support@konmask.com with part number, quantity, and required delivery date
Phone / WhatsApp: +0086 19859288691 (Mon–Fri, 09:00–18:00 CST)
Payment: T/T (wire transfer), PayPal, credit card, and trade assurance accepted
Shipping: DHL, FedEx, UPS express; sea freight available for large orders
Documentation: Commercial invoice, packing list, COO, and test report available on request

Replacement & Compatibility FAQ

Q: Can I replace a 1756-PA75 with a 1756-PA75R without chassis modification?
A: Yes. The 1756-PA75R is physically and electrically identical to the PA75 and fits the same chassis slot. The redundancy feature is simply inactive unless a second supply and SRM module are installed.

Q: Is the 1756-PB75 a direct replacement for the 1756-PA75?
A: No — the PB75 requires 18–32 VDC input versus the PA75’s AC input. Output characteristics are identical, but input wiring must be changed. Do not substitute without modifying the panel power feed.

Q: Can the 1756-PA75 power a full 17-slot chassis?
A: It depends on module selection. The PA75 provides 75 W / 13 A @ 5.1 VDC. High-density I/O or motion modules may exceed this in a 17-slot chassis. Always calculate total backplane load before specifying.

Q: What is the difference between Series A and Series B of the 1756-PA75?
A: Series B introduced minor firmware and hardware revisions for improved diagnostics. Both series are functionally compatible with the same chassis and controllers. Konmask.com stocks Series B as the current production revision.

Q: Do you supply refurbished or remanufactured units?
A: Konmask.com supplies new and verified-surplus units only. All surplus units are tested and certified before shipment. Refurbished units are clearly labeled as such and priced accordingly.

Q: How do I verify authenticity of a 1756-PA75?
A: Check the Rockwell Automation holographic label, verify the serial number via Rockwell’s PartnerNetwork portal, and inspect the PCB date code. Contact us if you have authenticity concerns about a unit you have received.