The 1761-NET-ENI (Ethernet Interface Module) from Rockwell Automation is a communication adapter used with MicroLogix and SLC controllers to enable Ethernet network connectivity.
It converts DF1 serial communication (RS-232) into Ethernet/IP-style network access, allowing older PLCs to be integrated into Ethernet-based industrial systems.
Typical use cases include:
- Connecting MicroLogix PLCs to Ethernet networks
- Remote programming and monitoring via Ethernet
- Integration with SCADA/HMI systems
- Legacy system Ethernet upgrade without replacing PLC
Main Functions
The 1761-NET-ENI provides:
- DF1 (RS-232) ↔ Ethernet communication conversion
- Ethernet network access for MicroLogix/SLC controllers
- Remote programming and diagnostics over LAN
- Basic TCP/IP Ethernet communication support
- Device-level bridging between serial PLCs and Ethernet systems
It does not replace the PLC Ethernet port, but acts as an external communication gateway.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1761-NET-ENI |
| Type | Ethernet Interface Module |
| Communication Ports | 1 × RS-232, 1 × Ethernet |
| Protocols | DF1 Full-Duplex, Ethernet |
| Power Supply | 20.4–26.4 V DC |
| Current Draw | ~50 mA typical (100 mA max) |
| Ethernet Speed | 10 Mbps (early versions), up to 100 Mbps (later series) |
| Isolation Voltage | ~710 V DC for 1 minute |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -45°C to 85°C |
| Mounting | DIN rail or panel mount |
| Weight | ~0.20 kg (≈1 lb) |
Physical Dimensions (L × W × H)
- 117.8 × 52.1 × 64.8 mm
- Approx. equivalent: 4.64 × 2.05 × 2.55 in
Key Features
- Converts serial DF1 to Ethernet communication
- Enables Ethernet access for MicroLogix/SLC PLCs
- Supports remote programming and monitoring
- Compact DIN rail design
- LED status indicators for network diagnostics
- BOOTP or static IP configuration support
- Industrial-grade electrical isolation
