1. Automation/Motion Controls For Sale
  2. sku: 15172694347387632
  3. ALLEN BRADLEY 634490AS-C-90

ALLEN BRADLEY 634490AS-C-90 Automation

634490as-c-90 Allen Bradley / 634490asc90 Used

( Brand: Allen Bradley ), ( Manufacturer Part Number: 634490AS-C-90 )

Review ALLEN BRADLEY 634490asc90 Used

The **Allen-Bradley 634490AS-C-90** is a high-performance, compact motor control center (MCC) designed for industrial automation applications requiring reliable, space-efficient power distribution and motor protection. Part of Rockwell Automation s modular 634 series, this unit combines robust engineering with flexibility to meet the demands of modern manufacturing environments. The **634490AS-C-90** features a **90-ampere (A) continuous current rating**, making it suitable for controlling and protecting three-phase AC motors ranging from fractional horsepower up to approximately 25 horsepower (depending on voltage and motor type), while also accommodating a variety of other electrical loads in industrial settings. Its **compact, NEMA 1 or NEMA 3R enclosure** ensures easy integration into control panels, machine bases, or wall-mounted installations, reducing footprint requirements without compromising safety or performance.

This motor control center incorporates a **single-phase or three-phase power input**, configurable for standard industrial voltages such as 208V, 230V, 460V, or 480V AC, depending on regional electrical standards. The **634490AS-C-90** is equipped with a **thermal overload relay (TOLR) with adjustable trip settings**, providing overcurrent and overload protection for connected motors. The relay s **manual reset capability** allows for safe troubleshooting and maintenance, while its **electronic trip curve** ensures precise protection against motor stalling, overheating, or short circuits. Additionally, the unit supports **auxiliary contacts** for remote monitoring or control signals, enhancing system integration with PLCs, HMIs, or other automation devices.

For enhanced safety and compliance, the **634490AS-C-90** includes **ground fault protection** and **short-circuit protection**, both critical for preventing equipment damage and ensuring operator safety in harsh industrial environments. The motor starter within this MCC features a **magnetic contactor** with **silver-cadmium oxide (Ag-CdO) or silver-graphite (Ag-Gr) contacts**, delivering superior arc resistance and longevity, even under frequent switching cycles. The **auxiliary relays** and **status indicators** provide clear feedback on motor operation, fault conditions, or maintenance requirements, simplifying diagnostics for technicians.

Designed with **modularity in mind**, the **634490AS-C-90** can be easily expanded or customized by adding additional motor starters, overload relays, or auxiliary devices within the same enclosure. Its **plug-in terminal blocks** facilitate quick wiring and reconfiguration, reducing downtime during system updates or repairs. The unit also supports **Rockwell Automation s FactoryTalk View software integration**, enabling seamless data logging, remote monitoring, and predictive maintenance capabilities for improved operational efficiency. Whether deployed in manufacturing plants, HVAC systems, conveyor applications, or material handling equipment, the **634490AS-C-90** delivers a balance of **reliability, efficiency, and adaptability**, making it an ideal choice for engineers and technicians seeking a dependable motor control solution.

### **Pros and Cons of buying a Allen-Bradley 634490AS-C-90 (CompactLogix 5370 Processor, 90 I/O Points)**

#### **Pros**

1. **Reliability and Brand Reputation**

- Allen-Bradley (now part of Rockwell Automation) is a well-established brand known for durable, high-performance industrial automation controllers. The CompactLogix 5370 series is designed for harsh environments, offering long-term reliability.

2. **Scalability and Flexibility**

- The 634490AS-C-90 supports up to 90 I/O points, making it suitable for mid-sized control applications. It can be expanded with additional modules (input/output, communication, or special function) as needed, reducing the need for a complete system upgrade later.

- Compatible with a wide range of Allen-Bradley I/O modules, allowing for customization based on application requirements.

3. **Advanced Programming Capabilities**

- Supports **Studio 5000 Logix Designer**, a robust programming environment with features like structured text, ladder logic, and function block diagrams. This makes it accessible for both PLC novices and experienced programmers.

- Includes built-in **EtherNet/IP** and **DeviceNet** communication ports, enabling seamless integration with other Rockwell Automation devices, HMI systems, and enterprise networks.

4. **Energy Efficiency and Cost Savings**

- The CompactLogix 5370 series is designed with power efficiency in mind, consuming less energy than some older PLC models while maintaining high performance.

- Reduces long-term operational costs by minimizing downtime and improving process optimization.

5. **Support and Documentation**

- Extensive documentation, tutorials, and community support (e.g., Rockwell Automation forums, third-party resources) are available for troubleshooting and programming.

- Compatible with legacy Allen-Bradley systems, making it easier to integrate into existing setups.

6. **Compact and Space-Efficient Design**

- The **C-series** (CompactLogix) is designed to fit into tight spaces, making it ideal for applications where space is limited.

- Modular design allows for easy installation and maintenance without disrupting the entire system.

7. **Security Features**

- Supports **EtherNet/IP security** (via encryption and authentication) to protect against cyber threats, which is increasingly important in modern industrial environments.

- Role-based access control can be implemented to restrict unauthorized changes to the PLC program.

8. **Compatibility with Modern Technologies**

- Works with **Industry 4.0** concepts, such as cloud connectivity (via Rockwell s FactoryTalk platform) and predictive maintenance tools.

- Can interface with **IoT devices** and **edge computing** solutions for advanced monitoring and analytics.

---

#### **Cons**

1. **High Upfront Cost**

- The 634490AS-C-90 is a premium product, and the initial purchase price is higher than some basic PLCs (e.g., smaller Allen-Bradley models or third-party alternatives like Siemens or Mitsubishi).

- Additional I/O modules, programming licenses (for advanced features), and communication hardware (e.g., Ethernet switches) may add to the total cost.

2. **Complexity for Beginners**

- While Studio 5000 is powerful, its learning curve can be steep for users unfamiliar with PLC programming or Rockwell Automation s ecosystem.

- Debugging and troubleshooting may require more time and expertise compared to simpler PLCs.

3. **Vendor Lock-In Risks**

- Heavy reliance on Rockwell Automation s ecosystem can make it difficult to migrate to other brands in the future. While the CompactLogix is widely used, switching to a different PLC platform (e.g., Siemens TIA Portal) would require reprogramming and potential retraining.

- Proprietary communication protocols (e.g., EtherNet/IP) may limit flexibility if integration with non-Rockwell devices is needed.

4. **Limited Physical I/O Points**

- The base model (90 I/O points) may be insufficient for very large or complex applications. Expanding I/O requires additional modules, which can increase cost and complexity.

- Unlike some larger PLCs (e.g., ControlLogix), the CompactLogix has a smaller maximum I/O capacity per rack, which may necessitate multiple units for high-density applications.

5. **Dependency on Software Licenses**

- Advanced features in Studio 5000 (e.g., structured text, certain security tools) may require additional software licenses, adding to the total cost of ownership.

- Some features (e.g., cloud connectivity) may require separate subscriptions or third-party tools.

6. **Potential for Obsolescence**

- While the CompactLogix 5370 series is still supported, newer models (e.g., the **CompactLogix 5380**) may offer improved performance, security, and features. Future-proofing may require upgrading sooner rather than later.

- Spare parts and support for older models may become harder to find over time, though Rockwell generally provides long-term support for their products.

7. **Installation and Configuration Time**

- Setting up the PLC, configuring I/O, and programming can be time-consuming, especially for users without prior experience.

- Requires proper grounding, power supply, and network configuration, which may add to installation complexity.

8. **Limited Analog Input/Output Options**

- While the 634490AS-C-90 supports analog I/O, the number of analog points is limited compared to some other PLCs. For high-precision analog applications, additional modules may be needed.

---

### **Conclusion**

The **Allen-Bradley 634490AS-C-90 (CompactLogix 5370)** is a **high-quality, scalable, and reliable PLC** well-suited for mid-sized industrial automation applications requiring robust performance, advanced programming, and seamless integration with Rockwell Automation s ecosystem. Its strengths lie in **reliability, flexibility, and compatibility with modern industrial technologies**, making it an excellent choice for manufacturers, process control systems, and automation projects where long-term support and scalability are priorities.

However, the **high cost, complexity for beginners, and vendor lock-in risks** must be carefully considered. If budget is a constraint or the application is relatively simple, a smaller or third-party PLC might be a more cost-effective alternative. Similarly, if the system requires frequent upgrades or non-Rockwell integration, the long-term flexibility of this PLC should be weighed against its advantages.

For most **mid-to-large industrial applications where durability, expandability, and advanced features are critical**, the **634490AS-C-90 is a strong recommendation**. Users should ensure they have the necessary expertise (or access to training) to fully utilize its capabilities and budget accordingly for additional modules, software licenses, and potential future expansions.

### **Final Recommendation**

**Buy the Allen-Bradley 634490AS-C-90 if:**

- You need a **reliable, scalable PLC** for a mid-sized automation project.

- Your system requires **EtherNet/IP or DeviceNet integration** with other Rockwell Automation devices.

- You prioritize **long-term support, advanced programming, and Industry 4.0 compatibility**.

- Your team has access to **Studio 5000 Logix Designer** or can invest in training.

- The application demands **compact yet powerful control** with room for future expansion.

**Consider alternatives if:**

- Your budget is tight and a **lower-cost PLC** (e.g., Allen-Bradley 1769-L30ERM, Siemens S7-1200, or Mitsubishi FX series) would suffice.

- Your application is **simple or small-scale**, and a more basic PLC would meet your needs.

- You require **maximum flexibility** and plan to integrate with non-Rockwell systems, making vendor lock-in a concern.

- Your team lacks experience with **Rockwell Automation s programming environment**, and training costs would be prohibitive.

Details:

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part #: 634490asc90 price

  • $237.78

specifications automationjack:

  • brand: Allen Bradley
  • mpn: 634490as-c-90

general automationjack:

  • condition: Used
  • Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment

seller automationjack:

  • rating: 99.7%
  • # reviews: 2014 49
  • city: 1 Millennium Dr, Willingboro, NJ 08046

shipping automationjack:

  • transit: 31-36 Days
  • service: Standard
  • type: Fixed
  • cost: $12.90
  • class: Standard

returns automationjack:

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

offer automationjack:

  • availability: In Stock
  • quantity: 1
  • sold: 0
  • options: Ship-to-home
  • started: April 27, 2026

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category: business & industrial > industrial automation motion controls > automation equipment, sku: 15172694347387632,
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