ALLEN BRADLEY 1738-EP24DC Plc Modules

( Brand: Allen Bradley ), ( Manufacturer Part Number: 1738-EP24DC ), ( Part Type: Module )

Review ALLEN BRADLEY 1738ep24dc Used

The **Allen-Bradley 1738-EP24DC** is a robust and versatile **CompactLogix 1738 Programmable Logic Controller (PLC)**, designed to deliver high-performance automation in industrial environments where space efficiency and reliability are critical. Part of Rockwell Automation s trusted CompactLogix series, this PLC is engineered to meet the demands of modern manufacturing, process control, and discrete automation applications. With a **24V DC power supply** and a **17-slot backplane**, the 1738-EP24DC provides ample expansion capability, allowing users to integrate a wide range of I/O modules, communication adapters, and advanced control functions to suit complex system requirements. Its **compact yet sturdy chassis** is built to withstand harsh industrial conditions, featuring a rugged metal enclosure that protects internal components from dust, moisture, and temperature fluctuations, ensuring long-term operational integrity. The controller operates seamlessly with **Studio 5000 Logix Designer**, Rockwell s industry-leading software platform, which simplifies programming, debugging, and monitoring through an intuitive graphical interface. This PLC excels in applications requiring precise timing, high-speed data processing, and seamless integration with other automation systems, such as Human Machine Interfaces (HMIs), motion controllers, and enterprise-level networks like Ethernet/IP or ControlNet. Whether deployed in a small control panel or as part of a larger distributed automation architecture, the 1738-EP24DC combines flexibility, scalability, and dependability, making it an ideal choice for engineers and technicians seeking a reliable foundation for their automation solutions. Its modular design allows for easy upgrades and customization, ensuring that it can adapt to evolving process requirements without significant downtime or infrastructure changes.

### **Pros and Cons of buying a Allen-Bradley 1738-EP24DC (1738EP24DC) Controller**

1. **High Reliability and Durability** Allen-Bradley (now part of Rockwell Automation) is a well-established brand known for robust industrial automation components. The 1738-EP series is designed for harsh environments, offering long-term reliability in manufacturing, process control, and other industrial applications.

2. **Compact and Space-Efficient Design** The 1738-EP24DC is a compact controller, making it suitable for installations where space is limited. Its small footprint helps in optimizing panel layouts without sacrificing functionality.

3. **Wide Input Voltage Range (24V DC)** The 24V DC power supply compatibility makes it versatile for various industrial setups where 24V DC is standard. This reduces the need for additional voltage conversion components in some applications.

4. **Modular and Scalable Architecture** The 1738-EP series supports modular expansion, allowing users to add I/O modules, communication ports, or other components as their automation needs grow. This scalability ensures long-term adaptability.

5. **Built-in Communication Ports** The controller includes Ethernet (EtherNet/IP), serial (RS-232/485), and other communication interfaces, enabling seamless integration with PLCs, HMIs, SCADA systems, and other industrial networks.

6. **Support for Advanced Programming** Compatible with **Studio 5000**, **RSLogix 5000**, and other Rockwell Automation software, allowing for complex logic programming, motion control, and process automation.

7. **Good Availability of Spare Parts and Support** As a legacy but still widely used product, finding replacement parts, documentation, and technical support is relatively easier compared to newer or niche brands.

8. **Cost-Effective for Mid-Range Applications** While not the cheapest option, the 1738-EP24DC offers a balanced price-to-performance ratio for applications requiring reliable, mid-sized PLC functionality.

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- No new firmware updates or security patches.

- Potential compatibility issues with newer software or communication protocols.

- Risk of obsolescence as Rockwell shifts focus to newer platforms (e.g., **CompactLogix, ControlLogix, or Micro800**).

2. **Limited I/O Capacity Compared to Modern PLCs** The 1738-EP24DC has a fixed number of I/O points (24 digital I/O, no analog by default unless expanded). Larger or more complex applications may require additional modules, increasing cost and complexity.

3. **No Built-in Analog Inputs/Outputs** The base model lacks analog I/O, meaning users must purchase separate analog expansion modules (e.g., **1738-A16DI16DO**) if temperature, pressure, or other analog signals are required.

4. **Slower Processing Speed Relative to Modern PLCs** Newer Rockwell PLCs (e.g., **Micro800, ControlLogix**) offer faster scan times and better performance for high-speed applications. The 1738-EP may struggle in applications requiring real-time precision.

5. **Dependence on Third-Party Support for Upgrades** Since Rockwell no longer supports it, users may need to rely on third-party vendors (e.g., **eBay sellers, automation distributors**) for parts or software, which can be inconsistent in quality or availability.

6. **Limited Security Features** Older PLCs lack modern cybersecurity measures (e.g., encrypted communications, role-based access control). This increases vulnerability in industrial networks.

7. **Higher Long-Term Maintenance Costs** Without official support, troubleshooting may require more time and expertise, potentially increasing downtime and repair expenses.

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### **Conclusion**

The **Allen-Bradley 1738-EP24DC** is a **reliable, compact, and well-suited controller for mid-range industrial applications** where space and 24V DC compatibility are priorities. Its modularity, communication capabilities, and compatibility with Rockwell software make it a strong choice for legacy systems or applications that do not require cutting-edge performance.

However, its **discontinued status, lack of official support, and limited scalability** for advanced applications make it a **less ideal choice for new installations or long-term projects**. If cybersecurity, high-speed processing, or future-proofing are concerns, newer Rockwell PLCs (e.g., **Micro800, CompactLogix**) would be preferable.

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### **Recommendation**

- You are replacing an existing 1738-EP system and need a drop-in replacement.

- Your application is **low to mid-complexity** with primarily digital I/O and no analog requirements.

- You have **existing Rockwell software (Studio 5000/RSLogix 5000) experience** and can manage legacy support.

- Cost is a concern, and you prioritize **proven reliability over future upgrades**.

- You are starting a **new project** and need long-term support, cybersecurity, or high-speed processing.

- Your application requires **analog I/O, motion control, or advanced networking** beyond basic Ethernet/IP.

- You want **official Rockwell warranty and future firmware updates**.

- You plan to integrate with **modern SCADA or cloud-based systems** that may not fully support legacy PLCs.

- For **new installations**, consider **Rockwell Micro800** (cost-effective, compact, Ethernet/IP) or **CompactLogix** (higher performance, better support).

- If **analog I/O is needed**, evaluate the **1738-A16DI16DO** expansion module alongside the EP24DC.

- For **budget-friendly legacy replacements**, check **Siemens LOGO! or Mitsubishi FX series** as alternatives, though compatibility may vary.

Ultimately, weigh the **cost savings against long-term risks** if the 1738-EP24DC fits your current needs and budget, it remains a **practical choice**. Otherwise, investing in a **supported, modern PLC** may save time and headaches in the future.

Details:

ALLEN BRADLEY 1738-EP24DC / 1738EP24DC USED EXPANSION POWER MODULE, ARMORPOINT I/O, 400MA 24 V DC INPUT, 1.3 A 5 OUTPUT TO POINTBUS, SEALED, IP69K. All products are guaranteed to be working but may show signs of use if purchasing a used product. Call to use a shipping service other than the ones listed. Sells new and surplus product develops channels to purchase such.

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: 1738ep24dc prices

• $318.70-$378.41

specifications sensoindustria:

• brand: Allen Bradley
• mpn: 1738-ep24dc
• part type: Module

general sensoindustria:

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

seller sensoindustria:

• rating: 99.7%
• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 2016 43

offer sensoindustria:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1
• started: April 29, 2026

shipping sensoindustria:

• transit: 30-35 Days
• service: Standard
• class: Standard
• cost: $12.90
• type: Fixed

returns sensoindustria:

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

payments sensoindustria:

• other
• wallet: Paypal
• credit card: Diners-club

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