MODICON 174-CEV-300-20 Schneider Electric

( Brand: Modicon ), ( Manufacturer Part Number: 174-CEV-300-20 )

Review MODICON Schneider Electric 174cev30020 Used

The **Schneider Electric Modicon 174-CEV-300-20** is a robust and versatile programmable logic controller (PLC) designed to deliver high-performance automation in industrial environments where reliability, scalability, and ease of integration are paramount. Part of Schneider Electric s **Modicon M580 series**, this PLC is engineered to meet the demands of modern manufacturing, process control, and discrete automation applications, offering a seamless blend of advanced functionality and user-friendly operation. The **174-CEV-300-20** features a **300-point I/O capacity** with **20 analog input/output (AI/O) channels**, making it an ideal choice for systems requiring precise control over analog signals such as temperature, pressure, flow, or voltage monitoring. Its **compact yet durable design** ensures easy installation in tight spaces, while the **modular architecture** allows for flexible expansion to accommodate growing automation needs without sacrificing performance.

At its core, the **174-CEV-300-20** is powered by Schneider Electric s **EcoStruxure Machine Expert software**, a comprehensive platform that simplifies programming, debugging, and maintenance through an intuitive graphical interface. This software supports **structured text, ladder logic, function block diagrams, and sequential function charts**, catering to engineers and technicians with varying levels of expertise. The PLC s **high-speed processing capabilities** and **real-time data acquisition** ensure minimal latency, critical for applications requiring synchronized control of multiple axes or precise timing sequences. Additionally, the **built-in Ethernet port** enables seamless communication with other PLCs, HMIs, SCADA systems, and cloud-based platforms, facilitating remote monitoring, predictive maintenance, and data analytics key components of Industry 4.0 initiatives.

Safety and redundancy are prioritized in the **174-CEV-300-20**, which supports **Schneider Electric s EcoStruxure Safety** framework, allowing for integrated safety functions such as emergency stops, safety doors, and machine safeguarding. The unit also features **industrial-grade components** with a **wide operating temperature range (-40 C to 70 C)**, making it suitable for harsh environments such as factories, oil and gas facilities, or outdoor installations. Its **low power consumption** and **energy-efficient design** contribute to cost savings while maintaining operational reliability. Whether deployed in a small-scale automation project or as part of a larger, distributed control system, the **Modicon 174-CEV-300-20** delivers a balance of **performance, flexibility, and ease of use**, positioning it as a cornerstone for modern industrial automation solutions.

### **Pros and Cons of buying a Modicon 174-CEV-300-20 (Schneider Electric PLC)**

1. **Proven Reliability** The Modicon 174 series is a well-established PLC platform with decades of industrial use, known for durability and consistent performance in harsh environments.

2. **High Performance** The 300-series models offer robust processing power, making them suitable for complex automation tasks, including motion control, high-speed I/O, and advanced logic.

3. **Scalability** The modular design allows for easy expansion with additional CPU modules, I/O cards, and communication ports, accommodating growing automation needs.

4. **Strong Communication Capabilities** Supports multiple protocols (Modbus, Ethernet/IP, Profibus, CANopen, etc.), ensuring compatibility with modern SCADA systems, HMIs, and other industrial devices.

5. **Redundancy & Fault Tolerance** The CEV (Centralized Expansion) architecture supports hot-swappable modules, reducing downtime during maintenance or upgrades.

6. **Industrial-Grade Build** Designed for harsh environments (temperature, vibration, electrical noise), making it ideal for manufacturing, oil & gas, and process industries.

7. **Legacy Support** Schneider Electric continues to provide technical support, documentation, and spare parts, ensuring long-term maintainability.

8. **Compatibility with Schneider Ecosystem** Works seamlessly with EcoStruxure, Unity Pro, and other Schneider automation tools, simplifying integration with newer systems.

9. **High-Speed I/O** The 300-series supports high-speed digital and analog I/O, suitable for applications requiring precise control (e.g., servo drives, sensors).

10. **Global Availability** Widely distributed through Schneider Electric and authorized distributors, reducing lead times for replacements or upgrades.

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1. **Age of Technology** While robust, the 174 series is not the latest PLC architecture. Newer models (e.g., Modicon M580, EcoStruxure Micro PLCs) offer improved features like built-in Ethernet, touchscreen integration, and cloud connectivity.

2. **Limited Modern Protocols** Some advanced industrial protocols (e.g., OPC UA, MQTT) may require additional gateways or adapters, unlike newer PLCs with native support.

3. **Higher Initial Cost** Compared to entry-level or mid-range PLCs (e.g., Allen-Bradley Micro800, Siemens LOGO!), the 174-CEV-300-20 is more expensive, especially for smaller applications.

4. **Complexity for Beginners** The modular design and advanced features may be overwhelming for users with limited PLC experience, requiring more training.

5. **Software Dependency** Relies on older versions of Unity Pro or other Schneider software, which may lack modern features like drag-and-drop programming or cloud diagnostics.

6. **Physical Size** The rack-mounted design takes up more space than compact PLCs, which may be a constraint in space-limited installations.

7. **Deprecation Risks** While Schneider supports it, long-term availability of spare parts or firmware updates could become uncertain as the product ages.

8. **No Built-in Touchscreen/HMI** Unlike some newer PLCs, the 174-CEV does not include an integrated HMI, requiring separate devices for operator interfaces.

9. **Limited IoT/Cloud Features** Lacks native support for remote monitoring, predictive maintenance, or cloud-based analytics, which are increasingly important in Industry 4.0 applications.

10. **Training Costs** Employees may need additional training to maintain or program this PLC, adding to operational expenses.

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### **Conclusion**

The **Modicon 174-CEV-300-20** is a **highly reliable, scalable, and robust PLC** ideal for **large-scale industrial automation** where performance, redundancy, and long-term support are critical. It excels in applications requiring **high-speed I/O, complex logic, and compatibility with legacy systems**. However, its **age, higher cost, and lack of modern features** (e.g., built-in cloud connectivity, simplified programming) make it less suitable for **smaller projects, IoT-enabled systems, or applications requiring cutting-edge technology**.

For **new installations or cost-sensitive projects**, newer PLCs (e.g., Schneider M580, Siemens S7-1200, or Allen-Bradley CompactLogix) may offer better long-term value. The 174-CEV-300-20 remains a **strong choice for existing systems or applications where its strengths align with operational needs**.

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### **Recommendation**

- You are **replacing or upgrading an existing 174-series system** and need backward compatibility.

- Your application requires **high-speed I/O, redundancy, or complex automation** in a **harsh industrial environment**.

- You prioritize **proven reliability and long-term support** over the latest features.

- Budget constraints allow for a **premium PLC** with modular scalability.

- You are starting a **new project** and want **modern features** (cloud connectivity, simplified programming, built-in Ethernet).

- Your application is **small-scale or cost-sensitive**, as newer PLCs offer better value.

- You need **easier integration with IoT, HMI, or SCADA systems** without additional gateways.

- Future-proofing is a priority, as newer PLCs support **OPC UA, MQTT, and predictive maintenance tools**.

For most **new automation projects**, investing in a **modern PLC** will provide better flexibility, lower total cost of ownership, and easier integration with emerging technologies. However, if you are **locked into the Modicon ecosystem or require its specific capabilities**, the 174-CEV-300-20 remains a **solid, high-performance choice**.

Details:

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. SCHNEIDER ELECTRIC 174-CEV-300-20 / 174CEV30020 USED DISCONTINUED BY MANUFACTURER, COMMUNICATION MODULE, ETHERNET BRIDGE, 9-30 VDC, 9-24 VAC. Sells new and surplus product develops channels to purchase such. Call to use a shipping service other than the ones listed.

All products are guaranteed to be working but may show signs of use if purchasing a used product.

part #: 174cev30020 prices

• $163.19-$295.00

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• mpn: 174-cev-300-20

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• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules

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