ALLEN BRADLEY Controllogix Slot Rack Chassis Power 1756-A10 1756-PA72/B I/o Supply

( Brand: Allen Bradley ), ( Manufacturer Part Number: 1756-PA72 ), ( Model: 1756-A10 1756-A10/C ), ( Part Type: Rack Supply )

Review ALLEN BRADLEY 1756-pa72/b Controllogix I/o Slot Rack Chassis And Power Supply

The **Allen-Bradley 1756-PA72 Controllogix I/O 10-Slot Rack Chassis with Integrated Power Supply** is a robust, high-performance modular control system designed to meet the demanding requirements of industrial automation environments. Part of Rockwell Automation s Controllogix family, this compact yet versatile chassis serves as the backbone for scalable control solutions, accommodating a wide range of I/O modules, communication adapters, and specialized devices within its 10-slot architecture. Engineered for reliability and efficiency, the 1756-PA72 features a **built-in power supply unit**, eliminating the need for external power distribution components and simplifying installation while reducing footprint complexity. The chassis is constructed from high-quality materials, ensuring durability in harsh industrial settings, including exposure to temperature fluctuations, vibration, and electrical noise. Its **10-slot design** allows for flexible configuration, enabling users to mix and match standard I/O modules such as digital, analog, serial, or high-speed Ethernet modules alongside specialized devices like motion control cards or advanced communication adapters, all while maintaining seamless integration with the Controllogix CPU. The power supply itself is a **redundant, hot-swappable unit**, delivering a stable 24V DC output with a maximum current capacity of 10 amps, ensuring continuous operation even during transient faults or component failures. This redundancy enhances system uptime and minimizes downtime in critical applications. The chassis also incorporates **industry-standard mounting features**, including DIN rail compatibility and a robust backplane design optimized for high-speed data transfer, supporting the full range of Controllogix communication protocols, including Ethernet/IP, DeviceNet, and ControlNet. Whether deployed in manufacturing plants, process control systems, or large-scale automation projects, the 1756-PA72 provides a **scalable, future-proof platform** that balances performance, ease of maintenance, and integration with Rockwell s broader automation ecosystem. Its modularity and integrated power solution make it an ideal choice for engineers seeking a streamlined yet powerful control system that adapts to evolving operational demands.

### **Pros and Cons of Buying an Allen-Bradley 1756-PA72 (10-Slot Rack Chassis with Power Supply)**

#### **Pros**

1. **Reliability and Industry Standard**

The 1756-PA72 is a well-established product from Rockwell Automation, known for robust performance in industrial automation. It is widely used in manufacturing, process control, and other critical applications, ensuring compatibility with existing systems and support from a large user base.

2. **High Capacity and Flexibility**

The 10-slot chassis provides ample space for expanding I/O modules, allowing for complex control systems. This scalability makes it suitable for growing applications without requiring frequent upgrades.

3. **Backward and Forward Compatibility**

The 1756-PA72 is compatible with older 1756 series controllers (e.g., 1756-L6x, 1756-L7x) and newer models like the ControlLogix 5562 or 5582. This ensures long-term usability and reduces the need for costly replacements.

4. **Redundant Power Supply Option**

The included power supply (or optional redundant unit) enhances system reliability by preventing downtime in case of a power failure. This is critical for applications where continuous operation is mandatory.

5. **Proven Performance in Harsh Environments**

The chassis is designed for industrial use, with features like vibration resistance, temperature tolerance, and protection against electrical noise. This makes it suitable for factories, oil and gas, and other demanding environments.

6. **Support for Advanced Features**

The ControlLogix platform supports high-speed Ethernet, serial communication, and integration with other Rockwell products (e.g., Studio 5000, FactoryTalk). This enables advanced monitoring, diagnostics, and automation capabilities.

7. **Resale and Replacement Market Availability**

Due to its widespread use, spare parts, modules, and replacement units are readily available, reducing downtime and maintenance costs.

8. **Energy Efficiency**

Modern ControlLogix systems are designed with energy-saving features, helping reduce operational costs over time.

---

#### **Cons**

1. **High Initial Cost**

The 1756-PA72 chassis and associated modules are expensive compared to newer or alternative brands (e.g., Siemens, Beckhoff, or open-source PLCs). The cost includes not only the chassis but also compatible I/O modules, programming software, and potential licensing fees.

2. **Legacy System Limitations**

While compatible with newer controllers, some advanced features (e.g., high-speed motion control, advanced analytics) may require additional modules or software upgrades, adding complexity and cost.

3. **Programming Complexity**

Rockwell s Studio 5000 software has a steep learning curve, especially for users unfamiliar with Ladder Logic (LD) or Structured Text (ST). Training may be required for engineers or technicians.

4. **Dependence on Rockwell Ecosystem**

Integration with non-Rockwell systems (e.g., third-party HMI, SCADA, or cloud platforms) can be challenging and may require additional gateways or middleware.

5. **Obsolescence Concerns**

While not immediately obsolete, Rockwell Automation has shifted focus to newer platforms (e.g., CompactLogix, GuardLogix). Future support for the 1756 series may diminish, potentially increasing long-term maintenance costs.

6. **Bulkiness and Space Requirements**

The 10-slot chassis is physically large, requiring dedicated space in control panels or racks. This may not be ideal for compact or space-constrained installations.

7. **Licensing and Software Costs**

Full-featured programming and debugging tools (e.g., Studio 5000) require licenses, which can be costly for small businesses or one-time projects.

---

### **Ending Conclusion**

The **Allen-Bradley 1756-PA72 (10-slot rack chassis with power supply)** is a **highly reliable, scalable, and proven solution** for industrial automation, particularly for applications requiring robust control, redundancy, and long-term stability. Its strengths lie in **compatibility, performance in harsh environments, and a vast support network**, making it ideal for large-scale manufacturing, process control, or legacy system upgrades.

However, the **high upfront cost, complexity of programming, and dependency on Rockwell s ecosystem** may pose challenges, especially for smaller operations or those seeking modern, open alternatives. If budget and long-term maintenance are not concerns, this chassis remains a **strong choice for mission-critical automation**. For cost-sensitive or future-proofing needs, evaluating newer or alternative PLC platforms (e.g., Siemens S7-1500, Beckhoff CX, or open-source options) may be worth considering.

---

### **Recommendation**

- You require a **proven, high-reliability control system** for large-scale industrial applications.

- Your project is **long-term** and requires compatibility with existing Rockwell Automation infrastructure.

- **Redundancy and scalability** are critical, and you can justify the initial investment.

- You have **access to trained personnel** familiar with Rockwell s programming environment.

- Your budget is **limited**, and newer or open-source PLCs (e.g., Siemens, Beckhoff, or openPLC) offer comparable performance at a lower cost.

- You prioritize **future-proofing** and modularity, as newer platforms may offer better long-term support.

- Your application is **small-scale or experimental**, where a more affordable or flexible solution (e.g., a CompactLogix or open PLC) would suffice.

For most **large industrial automation projects** where reliability and legacy support are paramount, the **1756-PA72 remains a sound investment**. However, for **cost-sensitive or innovative applications**, exploring modern alternatives may yield better long-term value.

Details:

And the cost of return shipping. Items in Lot1. Part Number1756-PA72 1756-PA72/B. Ask our experts.

Includes one Blank and a divider. Missing power supply cover. Removed From a Working Environment. Model 1756-A10/C.

Condition Used. Shipping Dimensions: length 19 in. Country of Manufacture/A.

part #: 1756pa72 prices

• $183.00-$600.00

specifications sensoindustria:

• brand: Allen Bradley
• mpn: 1756-pa72
• model: 1756-a10 1756-a10/c
• part type: Rack Supply

payments sensoindustria:

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shipping sensoindustria:

• cost: $30.90
• class: Standard, Expedited, One-day
• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day, FedEx Standard Overnight
• transit: 2-5 Days
• carrier: FedEx
• type: Calculated

offer sensoindustria:

• best offers: True
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• availability: In Stock
• quantity: 1
• started: April 16, 2026

returns sensoindustria:

• time: 30 Days
• method: Money back
• policy: Returns Accepted
• paid by: Buyer

seller sensoindustria:

• city: Millersburg, Indiana
• rating: 99.9%
• # reviews: 19233

general sensoindustria:

• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules
• condition: Used

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