ALLEN-BRADLEY 1785-L80E-E Cat Ethernet Processor Module Cat. 1785-L80E/E. PLC-5 Module. Rev. G01

( Brand: Allen-bradley ), ( Manufacturer Part Number: 1785-L80E/E ), ( Type: I/o Module ), ( Revision: G01 ), ( Controller Platform: Plc-5 ), ( Country Of Origin: United States )

Review ALLEN BRADLEY 1785-l80e/e Cat. 1785-l80e/e. Ethernet Processor Module. Rev. G01

The **Allen-Bradley 1785-L80E/E CAT PLC-5 Ethernet Processor Module (G01)** is a high-performance, industrial-grade communication module designed to integrate seamlessly into the **PLC-5** programmable logic controller family, bridging legacy automation systems with modern Ethernet-based networks. This module serves as the central hub for data exchange, enabling real-time connectivity between PLC-5 controllers and higher-level systems such as SCADA platforms, enterprise resource planning (ERP) software, or other industrial networks. Built with robust engineering standards, the **1785-L80E/E** supports **Class I, Division 2 (Class 1, Zone 2)** hazardous location certification, making it suitable for applications in environments with moderate explosion risks, such as oil and gas, chemical processing, or manufacturing facilities where safety compliance is critical.

The module features a **10/100 Mbps Ethernet interface**, ensuring fast and reliable data transmission while maintaining compatibility with **TCP/IP, UDP, and Modbus TCP** protocols, which simplifies integration with modern IT infrastructure. Its **CAT (Cat5e) rating** guarantees high-speed, low-latency communication over standard Ethernet cabling, reducing the need for specialized wiring and minimizing network congestion. The **G01 revision** of this module incorporates enhanced firmware stability and improved diagnostic capabilities, allowing operators to monitor network performance, detect connectivity issues, and troubleshoot errors more efficiently. With a **dual-port design** (one for network connectivity and one for optional backup or redundant configurations), the **1785-L80E/E** provides flexibility for mission-critical applications where uptime is non-negotiable.

Physically, the module is designed for easy installation into a **PLC-5 chassis**, occupying a single **1785-series slot** while maintaining full backward and forward compatibility with existing **PLC-5** and **PLC-5E** systems. Its rugged construction, featuring **industrial-grade connectors and shielding**, ensures resistance to electromagnetic interference (EMI) and environmental factors such as temperature fluctuations, vibration, and humidity, making it ideal for harsh factory floors or outdoor control applications. The module also supports **VLAN tagging** and **QoS (Quality of Service) prioritization**, allowing network administrators to optimize bandwidth allocation for time-sensitive control traffic while accommodating less critical data streams. Additionally, its **Modbus TCP support** enables easy integration with third-party devices and software, expanding the PLC-5 s functionality beyond traditional automation boundaries.

For maintenance and diagnostics, the **1785-L80E/E** provides **LED indicators** for network status, link activity, and fault conditions, offering quick visual confirmation of operational health. Advanced error logging and **remote management capabilities** via **Telnet or SSH** (when configured) allow technicians to perform firmware updates, security configurations, and performance tuning without physical access to the controller. The module s **compatibility with Rockwell Automation s FactoryTalk View and other HMI/SCADA solutions** further enhances its utility, enabling real-time monitoring, historical data logging, and remote control of industrial processes. Whether deployed in a **discrete manufacturing plant, process control environment, or distributed automation system**, the **Allen-Bradley 1785-L80E/E** serves as a reliable bridge between legacy automation and contemporary industrial networking, ensuring seamless data flow and operational efficiency.

### **Pros and Cons of buying a Allen-Bradley 1785-L80E/E (CAT PLC-5 Ethernet Processor Module, G01)**

1. **Compatibility with PLC-5 Systems** This module is designed specifically for the Allen-Bradley PLC-5 family, ensuring seamless integration with existing control systems. It maintains backward compatibility with legacy PLC-5 hardware and software.

2. **Ethernet Communication** The module provides Ethernet connectivity (via the G01 interface), enabling modern communication protocols such as TCP/IP, allowing for remote monitoring, data logging, and integration with SCADA or enterprise systems.

3. **Reliability and Proven Performance** The PLC-5 architecture is well-established in industrial automation, known for its robustness in harsh environments. This module extends that reliability with Ethernet support.

4. **Support for Multiple I/O Modules** The 1785-L80E/E can be paired with various 1785-series I/O modules, expanding the system s flexibility for different automation needs.

5. **Legacy Software Support** Since it is part of the PLC-5 family, it works with **RSLogix 5** and other legacy programming environments, making it suitable for maintenance or upgrades of older systems.

6. **Cost-Effective Upgrade Path** If an existing PLC-5 system lacks Ethernet, this module provides a cost-effective way to add network connectivity without replacing the entire controller.

7. **Industrial-Grade Construction** Allen-Bradley modules are built to withstand industrial conditions, including temperature fluctuations and electrical noise.

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1. **Limited Modern Protocol Support** While it supports Ethernet, it does not natively support advanced industrial protocols like **Modbus TCP, OPC UA, or PROFINET**, which may require additional gateways or converters for full integration with modern systems.

2. **Deprecated Technology** The PLC-5 platform is considered **legacy** by Allen-Bradley, meaning it is no longer actively developed. Future software updates or technical support may be limited.

3. **Higher Maintenance Overhead** Since the PLC-5 is an older architecture, troubleshooting and programming may require specialized knowledge, increasing operational costs over time.

4. **Scalability Limitations** The PLC-5 system has inherent limitations in terms of processing power and I/O expansion compared to newer controllers like **ControlLogix or CompactLogix**.

5. **Compatibility Issues with Newer Systems** Modern HMI, SCADA, or cloud-based solutions may not have built-in support for PLC-5 communication, requiring additional middleware or adapters.

6. **End-of-Life (EOL) Status** Allen-Bradley has phased out most PLC-5 products, meaning parts may become harder to source in the long term.

7. **Lack of Built-in Security Features** Unlike newer controllers, the PLC-5 Ethernet module does not include advanced cybersecurity features, making it more vulnerable to network-based threats.

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### **Conclusion**

The **Allen-Bradley 1785-L80E/E (CAT PLC-5 Ethernet Processor Module, G01)** is a **practical choice** for maintaining or upgrading an existing PLC-5 system that requires Ethernet connectivity. It provides a **cost-effective solution** for adding network capabilities to legacy automation setups while ensuring compatibility with older I/O and software.

However, if the goal is **long-term scalability, modern communication protocols, or reduced maintenance costs**, investing in a **newer controller platform** (such as **ControlLogix, CompactLogix, or even a modern PLC with Ethernet/IP or Modbus TCP support**) would be a better long-term decision. The PLC-5 architecture, while reliable, is **not future-proof** and may eventually become a bottleneck in an evolving industrial environment.

### **Recommendation**

- You have an **existing PLC-5 system** that needs Ethernet connectivity.

- You are **not planning major upgrades** and need a quick, compatible solution.

- You have **legacy software and I/O** that must remain in place.

- You are **starting a new project** and can afford a more scalable controller.

- You need **advanced communication protocols** (Modbus, OPC UA, etc.).

- You anticipate **long-term maintenance or expansion** beyond PLC-5 capabilities.

- You require **better cybersecurity and industrial networking features**.

For **new installations or future-proofing**, consider **Allen-Bradley s ControlLogix (556x), CompactLogix (176x), or even third-party PLCs** that offer better performance, modern protocols, and easier integration with current industrial standards.

Details:

The Allen-Bradley Cat. Manufactured by Allen-Bradley in the USA, this I/O module is specifically designed for communication and control industrial automation systems. # 1785-L80E/E PLC-5 Ethernet Processor Module is a high-quality industrial automation component designed for use with the controller platform. With a revision of G01, this module ensures compatibility and reliability for various automation applications.

part #: 1785l80e prices

• $89.00-$397.00

specifications sensoindustria:

• brand: Allen-bradley
• mpn: 1785-l80e/e
• type: I/o Module
• revision: G01
• controller platform: Plc-5
• country of origin: United States

payments sensoindustria:

• credit card: Mastercard
• other
• wallet: Paypal

offer sensoindustria:

• started: March 21, 2026
• quantity: 1
• availability: In Stock
• best offers: True
• sold: 0
• options: Ship-to-home

seller sensoindustria:

• # reviews: 122
• city: Tonganoxie, Kansas
• rating: 100.0%

returns sensoindustria:

• policy: No Returns

general sensoindustria:

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

shipping sensoindustria:

• type: Calculated
• carrier: UPS
• transit: 3-5 Days
• class: Standard, Expedited, One-day
• service: UPS Ground, UPS 2nd Day Air, UPS Next Day Air Saver, UPS Next Day Air
• cost: $12.81

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