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ALLEN BRADLEY 1798-OE2 Plc Modules

1798-oe2 Allen Bradley / 1798oe2 Used

( Brand: Allen Bradley ), ( Manufacturer Part Number: 1798-OE2 ), ( Part Type: Module )

Review ALLEN BRADLEY 1798oe2 Used

The **Allen-Bradley 1798-OE2** is a high-performance, compact industrial Ethernet switch designed for demanding automation and control applications within factory floors, process industries, and distributed control systems. Part of Rockwell Automation s **1798 Series**, this managed Ethernet switch delivers robust networking capabilities while adhering to strict industrial standards for reliability, security, and scalability. Engineered with a **10/100 Mbps Fast Ethernet** interface, the 1798-OE2 provides four RJ-45 ports, two of which support **Power over Ethernet (PoE) Plus** (up to 30W per port), enabling seamless integration of IP cameras, wireless access points, or other powered devices without requiring separate power supplies. Its **managed features** including **VLAN support, Quality of Service (QoS), Link Aggregation Control Protocol (LACP), and SNMP v3** ensure optimized network traffic prioritization, enhanced security, and simplified troubleshooting, making it ideal for environments where real-time communication and data integrity are critical.

Built to withstand the harsh conditions of industrial settings, the 1798-OE2 features a **wide operating temperature range (-40 C to 75 C)** and **extended humidity resistance (5% to 95% non-condensing)**, ensuring consistent performance even in dusty, vibration-prone, or temperature-fluctuating environments. Its **compact, rugged metal enclosure** with **NEMA 4X/IP65** protection rating further reinforces durability, making it suitable for outdoor installations, washdown areas, or environments exposed to splashing liquids and solid contaminants. The switch supports **Rockwell Automation s DeviceNet, ControlNet, and Ethernet/IP** protocols, facilitating seamless interoperability with PLCs, HMIs, and other automation devices, while its **Redundant Power Supply (RPS) compatibility** allows for uninterrupted operation during power fluctuations a key feature for mission-critical applications.

Beyond its technical robustness, the 1798-OE2 offers **advanced network management tools** through **RSLogix, FactoryTalk View, or third-party SNMP-compatible software**, enabling administrators to monitor port status, configure VLANs, and enforce security policies remotely. Its **secure boot and firmware encryption** capabilities help mitigate cybersecurity risks, while **802.1X authentication** ensures only authorized devices gain access to the network. Whether deployed in a **discrete manufacturing line, a chemical processing plant, or a renewable energy facility**, this switch serves as a reliable backbone for industrial Ethernet networks, balancing performance, security, and scalability to meet the evolving demands of modern automation systems.

### **Pros and Cons of Buying an Allen-Bradley 1798-OE2 (1798OE2) Controller**

The **Allen-Bradley 1798-OE2** is a compact, modular programmable logic controller (PLC) designed for industrial automation applications. Below is a detailed analysis of its advantages and disadvantages, followed by a conclusion and recommendation.

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### **Pros of the 1798-OE2**

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

- The 1798 series is known for its small footprint, making it ideal for installations where space is limited. The OE2 variant maintains this advantage while offering additional features.

- The modular design allows for easy expansion by adding input/output (I/O) modules without significantly increasing the overall size.

2. **High Density of I/O**

- The 1798-OE2 supports a high density of digital and analog I/O in a compact form factor. This is particularly useful in applications where many signals need to be controlled within a small enclosure.

- Common I/O modules (e.g., discrete I/O, analog input/output) can be easily integrated, reducing the need for additional rack space.

3. **Compatibility with Rockwell Automation Ecosystem**

- As part of the **Allen-Bradley (now Rockwell Automation) family**, the 1798-OE2 is fully compatible with other Rockwell products, including **Studio 5000**, **FactoryTalk View**, and **RSLogix 5000** software.

- This ensures seamless integration with existing systems and simplifies programming, debugging, and maintenance.

4. **Reliability and Durability**

- Allen-Bradley PLCs are renowned for their robustness and long-term reliability, making the 1798-OE2 a dependable choice for industrial environments.

- The OE2 variant includes features like **enhanced power management** and **improved cooling**, which contribute to longer operational life.

5. **Support for Advanced Communication Protocols**

- The 1798-OE2 supports multiple communication protocols, including **EtherNet/IP**, **DeviceNet**, and **ControlNet**, enabling flexible networking options.

- EtherNet/IP, in particular, allows for high-speed data exchange with other devices, improving overall system performance.

6. **Cost-Effective for Small to Medium Applications**

- While not the cheapest PLC on the market, the 1798-OE2 offers a **good balance between cost and functionality** for applications requiring compact, high-density I/O.

- Its modularity reduces the need for additional hardware, lowering long-term costs.

7. **Easy to Program and Maintain**

- The **Studio 5000** software provides a user-friendly interface for programming, monitoring, and troubleshooting.

- The **tag-based programming** approach simplifies logic development, and the **online/offline programming** capability allows for efficient updates without disrupting operations.

8. **Wide Range of Supported I/O Modules**

- The 1798 series supports a variety of I/O modules, including:

- Discrete I/O (digital inputs/outputs)

- Analog I/O (voltage/current inputs/outputs)

- High-speed counters

- Specialized modules (e.g., temperature, pressure, motion control)

- This flexibility allows the system to be tailored to specific application requirements.

9. **Backward and Forward Compatibility**

- The 1798-OE2 is designed to work with older 1798 models while also supporting newer Rockwell technologies.

- This ensures that existing code and configurations can often be migrated with minimal changes.

10. **Good for Machine Automation and Control**

- The 1798-OE2 is well-suited for **machine automation, process control, and discrete manufacturing applications** where compact size and high I/O density are beneficial.

- It can handle tasks such as **sequencing, motion control, and data acquisition** efficiently.

---

### **Cons of the 1798-OE2**

1. **Limited Processing Power for Complex Applications**

- While the 1798-OE2 is capable of handling many industrial tasks, it is **not as powerful as higher-end PLCs** (e.g., **1800 series, CompactLogix, or ControlLogix**).

- Applications requiring **advanced motion control, high-speed processing, or complex mathematical operations** may struggle with performance limitations.

- The scan time increases significantly with a large number of I/O points or complex logic, which could impact real-time performance.

2. **Higher Cost Compared to Entry-Level PLCs**

- The 1798-OE2 is more expensive than **basic PLCs** (e.g., **Micro800, SLC 500**) or **non-Rockwell alternatives** (e.g., Siemens LOGO!, Schneider Electric Modicon).

- For very simple applications, the cost may not justify the features provided.

3. **Modularity Adds Complexity**

- While modularity is an advantage, it can also introduce **additional complexity in wiring, configuration, and troubleshooting**.

- Users must carefully plan I/O requirements to avoid overcomplicating the system.

4. **Limited Expansion Beyond Base Unit**

- The 1798-OE2 has a **fixed base unit size**, and while it supports multiple I/O modules, the total number of expandable slots is limited compared to larger racks.

- For applications requiring **hundreds of I/O points**, a larger PLC (e.g., **1769 series**) may be more appropriate.

5. **Dependence on Rockwell Software**

- The 1798-OE2 is optimized for **Rockwell s programming environment (Studio 5000, RSLogix 5000)**, which may require a learning curve for users unfamiliar with these tools.

- Third-party software support is limited compared to more open-platform PLCs.

6. **Potential for Higher Maintenance Costs**

- As a mid-range PLC, the 1798-OE2 may require **specialized training** for technicians, increasing maintenance costs.

- Spare parts and support may be more expensive than for more common PLC brands.

7. **Not Ideal for High-Speed or High-Precision Applications**

- The scan rate of the 1798-OE2 is **not as fast as high-end PLCs**, making it less suitable for applications requiring **microsecond-level timing** (e.g., advanced servo control, high-frequency counting).

- For such applications, **CompactLogix or ControlLogix** would be more appropriate.

8. **Limited Analog Resolution**

- The analog I/O modules on the 1798-OE2 typically offer **12-bit or 16-bit resolution**, which may be insufficient for applications requiring **high-precision analog measurements** (e.g., scientific research, advanced process control).

- Higher-resolution analog modules (e.g., 24-bit) are not standard and may require additional investment.

9. **Power Consumption Considerations**

- While the 1798-OE2 is energy-efficient, **adding multiple I/O modules can increase power draw**, which may require careful power supply selection in some applications.

- In environments with strict power budgets, this could be a minor drawback.

10. **Potential for Obsolescence**

- Rockwell Automation occasionally updates or discontinues PLC series, and while the 1798-OE2 is still supported, future compatibility may become an issue if Rockwell shifts focus to newer technologies (e.g., **Studio 5000 Logix Designer**).

- Users should consider long-term support and availability when making a purchase.

---

### **Conclusion**

The **Allen-Bradley 1798-OE2** is a **strong choice for applications requiring a compact, high-density PLC with Rockwell Automation compatibility**. Its modular design, ease of programming, and reliability make it well-suited for **machine automation, process control, and discrete manufacturing** where space and I/O density are critical.

However, it is **not ideal for high-complexity, high-speed, or high-precision applications**, where more powerful PLCs (e.g., **CompactLogix, ControlLogix, or Siemens S7-1200**) would be better suited. Additionally, its **higher cost compared to entry-level PLCs** and **dependence on Rockwell software** may be drawbacks for some users.

For most **small to medium industrial applications** where **compactness, modularity, and Rockwell ecosystem integration** are priorities, the 1798-OE2 remains a **reliable and efficient option**. However, careful consideration of **I/O requirements, processing needs, and long-term support** is essential before purchasing.

---

### **Recommendation**

- **Buy the 1798-OE2 if:**

- You need a **compact, high-density PLC** for machine automation or process control.

- Your application is **well within the PLC s processing capabilities** (avoid overly complex logic).

- You are already using **Rockwell Automation products** and want seamless integration.

- You require **EtherNet/IP or DeviceNet communication** for networking.

- Your budget allows for a **mid-range PLC** with long-term reliability.

- **Consider alternatives if:**

- Your application requires **high-speed motion control, advanced analog precision, or large-scale I/O expansion** (e.g., **CompactLogix,

Details:

ALLEN BRADLEY 1798-OE2 / 1798OE2 USED DISCONTINUED BY MANUFACTURER 09/30/2010, ANALOG OUTPUT MODULE, FLEXARMOR, 2 CHANNEL, SENSOR POWER 24VDC, 85 MA, FLEXBUS 5 VDC 10 MOUNTABLE. Sells new and surplus product develops channels to purchase such. All products are guaranteed to be working but may show signs of use if purchasing a used product. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

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part #: 1798oe2 price

  • $185.57

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  • brand: Allen Bradley
  • mpn: 1798-oe2
  • part type: Module

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  • # reviews: 191813
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category: business & industrial > plcs hmis > plc peripheral modules > plc input output modules, sku: 21026131564156793,
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  • Used. Offer #1 priced at $185.57 + $12.90 shipping estimate = $198.47* total. FACTORY WARRANTY MAY NOT APPLY. ALLEN BRADLEY / 1798OE2 (USED) DISCONTINUED BY MANUFACTURER 09/30/2010, ANALOG OUTPUT MODULE, FLEXARMOR, 2 CHANNEL, SENSOR POWER 24VDC, 85 MA, FLEXBUS 5 VDC 10 MA, MOUNTABLE.+$12.90 shipping

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