1785-ENET | Allen Bradley | PLC-5 EtherNet/IP Interface Module

Product Overview

The Allen Bradley 1785-ENET acts as a high-performance communication bridge, adding EtherNet/IP connectivity to existing PLC-5 control systems. This module enables legacy processors to exchange data with modern HMIs, SCADA systems, and other controllers over standard Ethernet networks. We supply this unit as 100% Brand New and Original, featuring a factory-applied conformal coating to ensure long-term durability in harsh industrial environments. By installing this module, you modernize your 1771-chassis based systems without a full processor replacement.

Technical Specifications

The 1785-ENET integrates directly into the PLC-5 architecture with the following parameters:

Engineering Advantages

• Instant Modernization: This module provides an Ethernet port for "Classic" and "Enhanced" PLC-5 processors. It eliminates the reliance on slow DH+ or RIO networks, facilitating faster data throughput for modern plant-wide analytics.

• Aggressive Environmental Resistance: The specialized conformal coating protects the internal circuitry from salt spray, high humidity, and airborne chemical contaminants. This treatment prevents short circuits and dendritic growth in corrosive atmosphere industries like wastewater or chemical processing.

• Simplified Integration: The 1785-ENET connects directly to Channel 3 of the PLC-5 processor. This direct-connection architecture minimizes software configuration and does not require an external power supply, as the unit draws all necessary power from the 1771 backplane.

• Deterministic Messaging: The module manages process messages efficiently, allowing the main CPU to focus on logic execution while the 1785-ENET handles the heavy communication overhead of the EtherNet/IP stack.

• Flexible Diagnostics: Integrated LED indicators (STAT, 10M, 100M) provide real-time hardware and network health status. Technicians identify link speeds and diagnostic faults instantly without specialized software tools.

FAQs

• Which PLC-5 series are compatible with the 1785-ENET?

  This module supports a wide range of processors, including Enhanced PLC-5/11, 5/20, 5/40, 5/60, and 5/80 models. Please verify your processor's hardware series and firmware revision (e.g., Series C Rev K or later) to ensure full compatibility.

• Does this module require an external 24V DC power source?

  No. The 1785-ENET draws its 1.0 A of current directly from the 1771 backplane's 5V DC rail. Ensure your rack's power supply has sufficient headroom for this additional load.

• What is the maximum number of Ethernet modules I can install in one rack?

  You can install up to four 1785-ENET modules in a single PLC-5 system. This allows you to segregate network traffic or create redundant communication paths to different plant sub-networks.

• Is this a factory-sealed unit?

  Absolutely. We guarantee this 1785-ENET is 100% Brand New original stock. It arrives in factory-sealed Allen Bradley packaging with all original security seals and the verifiable UPC (612598169207) intact.