Overview
The Allen-Bradley 1761-NET-AIC (AIC+ Advanced Interface Converter) is a purpose-built network adapter for connecting DF1-enabled devices to DH-485 communication networks. It provides isolated RS-232 to RS-485 conversion with integrated electrical isolation, making it an essential component in legacy and hybrid MicroLogix and SLC automation systems that require bridging between incompatible serial protocols.
Key Features
- Dual RS-232 communication ports (one 9-pin DB-9, one 8-pin mini-DIN) plus one RS-485 DH-485 port for flexible connectivity
- 500 VDC internal isolation voltage ensures protection against ground loops and signal noise
- Supports up to 32 nodes per multidrop DH-485 network with maximum network length of 1219 m (4000 ft)
- Operates on 24 VDC external power or via communication cable supply
- DC power selection switch and communication rate selector for easy configuration
- Non-protocol converter: all devices must use the same communication protocol (DF1 or DH-485)
Technical Specifications
- Power Supply: 20.4–28.8 VDC
- Operating Current: 0–120 mA at 24 VDC
- Inrush Current: 200 mA maximum
- Internal Isolation: 500 VDC
- Communication Protocol: DF1, DH-485
- Network Nodes: 32 maximum per multidrop network
- Network Distance: 1219 m (4000 ft) maximum
- Weight: 0.40 lbs
- Serial Interface Ports: RS-232 (2), RS-485 (1)
Typical Applications
- Connecting MicroLogix 1000, 1200, 1500 controllers to existing DH-485 networks
- Interfacing SLC 5/01, 5/02, and 5/03 processors with DF1 serial devices
- Bridging legacy serial automation equipment with modern multidrop networks
- Providing isolated RS-232 to RS-485 conversion for any Allen-Bradley controller with RS-232 capability
- Point-to-point and half-duplex ASCII isolator applications in industrial environments
Compatibility & Replacements
Compatible With
- MicroLogix 1000, 1200, 1500 controllers
- SLC 5/01, 5/02, 5/03 processors
- MicroLogix 1100 and 1400 controllers
- Any Allen-Bradley controller or terminal with RS-232 port
- DH-485 multidrop networks
- DF1 protocol devices and networks
Replaces / Drop-In Replacement For
- Verify replacement compatibility with your system integrator or controls engineer before ordering, as the 1761-NET-AIC was discontinued by the manufacturer in 2016.
Works With
- DF1 full-duplex and half-duplex communication protocols
- DH-485 serial networks
- RS-232 and RS-485 serial interfaces
- Allen-Bradley PLC programming environments (RSLogix and legacy platforms)
- Peer-to-peer messaging between controllers
