Allen-Bradley 1761-NET-AIC MicroLogix and SLC Communication Adaptor

The Allen-Bradley 1761-NET-AIC, commonly known as the AIC+ Advanced Interface Converter, provides essential protocol bridging for legacy industrial networks. This device primarily links DF1-compatible hardware to DH-485 communication lines. It establishes a reliable connection between MicroLogix controllers and SLC 500 processors. Furthermore, it serves as a critical interface for linking operator terminals to PLC systems. The adaptor ensures seamless data flow across diverse Allen-Bradley automation platforms.

Hardware Interface and Ports

• RS-232 Port 1: 9-pin D-shell connector for PCs or modems
• RS-232 Port 2: 8-pin mini-DIN connector for MicroLogix controllers
• Network Port: RS-485 DH-485 Phoenix-style plug for trunk lines
• Baud Rate Selection: Manual switch for 600 to 19.2K bps
• Mounting Options: Standard DIN rail or panel-mount capability

Technical Performance and Isolation

This module delivers superior signal integrity through high-level electrical isolation between ports. It effectively functions as an RS-232 to RS-485 isolator to protect sensitive controller electronics. Additionally, the 1761-NET-AIC supports ASCII isolation for peripheral devices like barcode scanners or printers. Users can power the unit through an external 24V DC source. Alternatively, the communication cable can provide power directly from the MicroLogix controller. A dedicated selector switch manages these different power input modes.

Industrial Network Applications

The AIC+ adaptor supports complex network topologies including point-to-point and multi-drop configurations. It integrates perfectly with SLC 5/01, 5/02, and 5/03 processors via their native ports. Moreover, it allows MicroLogix 1000, 1200, and 1500 units to participate in DH-485 networking. The module also bridges communications for Logix-based systems using the 1756-DH485 interface. Its compact form factor suits tight control cabinets and remote monitoring stations.