Overview
The Allen-Bradley 1761-NET-ENI Series D is a compact EtherNet/IP interface module that bridges legacy industrial controllers to modern Ethernet networks. Designed for MicroLogix, SLC 500, and CompactLogix systems, this module provides reliable industrial networking for program upload/download, real-time data exchange, and device-to-device communication over standard Ethernet infrastructure.
Key Features
- 100Base-T Ethernet connectivity — 10/100 Mbps RJ45 port with embedded link/traffic status LEDs for quick network diagnostics
- DF1 full-duplex serial communication — RS-232 port enables backward-compatible controller communication
- 24 V DC powered — Low-voltage operation with 50 mA backplane current draw at 24V, suitable for industrial control cabinets
- Auto-negotiation support — Automatic speed and duplex mode detection for simplified network integration
- Configuration over Ethernet — Built-in security provisions and BOOTP/DHCP support for flexible IP addressing
- Compact DIN rail mount — Space-efficient design for control enclosures and panel-mounted systems
Technical Specifications
- Communication Interface: 100Base-T (10/100 Mbps) EtherNet/IP via RJ45
- Serial Port: RS-232 with DF1 full-duplex protocol
- Input Voltage: 20.4–26.4 V AC (backplane-supplied)
- Current Draw: 50 mA at 24V DC
- Certification: CE marked for EU/EEA installation; designed to EN 61131-2 industrial standards
- Operating Environment: Industrial indoor; requires proper enclosure per NEMA 250 / IEC 529
- Protocol Support: EtherNet/IP with BOOTP and DHCP configuration
Typical Applications
- Adding Ethernet connectivity to legacy MicroLogix 1000/1100 controllers without network ports
- Bridging older SLC 500 systems to modern enterprise networks and SCADA/MES platforms
- Real-time data logging and supervisory control in distributed manufacturing environments
- Integration of legacy PLCs into Industry 4.0 networks for condition monitoring and analytics
- DH-485 to EtherNet/IP network conversion for facility-wide automation upgrades
Compatibility & Replacements
Compatible With
- MicroLogix 1000, MicroLogix 1100, MicroLogix 1200 controllers
- SLC 500 (SLC-05/03, SLC-04/05) processors
- CompactLogix L35 series controllers
- EtherNet/IP industrial networks and standard Ethernet infrastructure
- Studio 5000 Logix Designer and RSLogix 500 programming platforms
- BOOTP/DHCP network configuration utilities
Replaces / Drop-In Replacement For
- 1761-NET-ENI Series A, B, C (with firmware/configuration compatibility verification)
- Legacy serial-only MicroLogix installations requiring network upgrade paths
Works With
- EtherNet/IP: Standard industrial protocol for real-time Ethernet communication
- DF1 Full-Duplex: Serial communication protocol for controller data exchange
- BOOTP/DHCP: Automatic IP addressing and network configuration
- Studio 5000 Logix Designer: Program upload/download over Ethernet
- RSLogix 500: Legacy SLC 500 programming interface
- Standard industrial Ethernet switches: 100Base-T compatible networks
