Product Details
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:
| Feature | Specification |
| Communication Protocol | EtherNet/IP |
| Transmission Speed | 10/100 Mbps (Auto-negotiating) |
| Port Interface | One (1) RJ45 Ethernet Port |
| Backplane Current | 1.0 A @ 5V DC |
| Power Dissipation | 5 Watts |
| Heat Dissipation | 17.06 BTU/hr |
| Status Indicators | STAT, 10M, 100M LEDs |
| Environmental Protection | Factory Conformal Coated |
| Max Modules per System | 4 |
| Weight | 1.75 lbs (0.79 kg) |
Engineering Advantages
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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.
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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.
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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.
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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.
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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
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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.
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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.
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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.
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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.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.