Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 1756-PA75/B |
| Product Type | Standard AC Power Supply |
| Input Voltage Range | 85…265 V AC |
| Nominal Input | 120 / 240 V AC |
| Frequency Range | 47…63 Hz |
| Max Input Power | 100 VA / 100 W |
| Max Output Power | 75 W @ 0…60 °C |
| Current Capacity @ 5.1 V DC | 13 A |
| Current Capacity @ 24 V DC | 2.8 A |
| Current Capacity @ 3.3 V DC | 4 A |
| Current Capacity @ 1.2 V DC | 1.5 A |
| Mounting Location | Left side of 1756 chassis |
| Compatible Chassis | 1756-A4, A7, A10, A13, A17 (Series B) |
4. Product Introduction (Anti-Template)
The Allen-Bradley 1756-PA75/B is a standard AC power supply designed for ControlLogix chassis. It mounts on the left side of the chassis and plugs directly into the backplane, supplying the necessary DC voltages to all modules in the rack.
It accepts a wide input range of 85–265 V AC and delivers up to 75 W of combined output power across the 5.1 V, 24 V, 3.3 V, and 1.2 V backplane rails. The Series B version provides 13 A at 5.1 V DC, making it suitable for fully loaded chassis with higher-current modules. The power supply includes hold-up time to ride through brief power interruptions and features a status LED for quick diagnostics. It is a non-redundant, open-style unit intended for standard industrial environments.
1756-PA75-B
1756-PA75-B
1756-PA75-B
1756-PA75-B
5. QC, Procurement & Logistics SOP
- Inbound Verification – Confirm catalog number (1756-PA75/B or 1756-PA75-B), series letter, and physical condition of connectors and terminals. Photograph all labels.
- Functional Testing – Install on a compatible chassis, apply AC power, and verify status LED and backplane voltages where possible.
- QA & Packaging – Protect the backplane connector and terminal block, clean the unit, and pack in protective packaging.
- Global Logistics & Export Compliance – Classify under the correct HS code for industrial power supplies. Packaging must protect against mechanical shock; export documentation is prepared to minimize customs delays.
6. Technical Pitfalls & Integration Warnings
Power Budget – The total power drawn by all modules in the chassis must not exceed 75 W. Calculate the sum of module currents at each voltage rail before finalizing the configuration.
Chassis Compatibility – Confirm the chassis is Series B (or later compatible). Series A chassis have different power supply requirements.
Wiring – Use the specified wire size (14 AWG / 2.5 mm²) and torque values. Incorrect torque can cause overheating or intermittent power.
Hold-Up Time – Hold-up time varies with input voltage. At lower line voltages the ride-through capability is reduced.
7. Frequently Asked Questions (FAQ)
What is the realistic global lead time for a verified 1756-PA75-B?
As a common ControlLogix power supply, availability is generally good. Typical lead time after verification is 3–10 business days plus standard shipping.
What is the input voltage range?
85–265 V AC, 47–63 Hz.
How much current does it supply at 5.1 V?
13 A (Series B).
Where does it mount?
On the left side of a 1756 ControlLogix chassis.
Is it redundant?
No. This is a standard (non-redundant) power supply. Redundant versions are available as 1756-PA75R.
What should be confirmed before ordering a replacement?
Exact catalog number including series (1756-PA75/B), chassis series compatibility, and total power budget of the modules in the rack.
What are typical applications?
Powering ControlLogix chassis in machine control, process skids, and industrial automation systems.
