Overview
The Allen-Bradley 1761-NET-AIC is an AIC+ Advanced Interface Converter designed to bridge communication between DF1-enabled devices and DH-485 networks. This device provides network bridging and electrical isolation, making it ideal for connecting diverse controllers and peripherals within industrial automation systems. It supports DH-485 multidrop networks with up to 32 nodes and offers multiple operation modes including point-to-point isolation, RS-232 to RS-485 conversion, and half-duplex ASCII user mode isolation.
Key Features
- Dual RS-232 ports: One 9-pin DB-9 connector and one 8-pin mini-DIN connector for flexible programming and communication options
- DH-485 port: Full RS-485 support for multidrop network connectivity up to 32 nodes per network
- 500 VDC isolation: Robust electrical isolation ensures signal integrity and protection in industrial environments
- Flexible power supply: Accepts 24 VDC from external source or through communication cable, with integrated DC power selection switch
- Configurable communication rates: Built-in communication rate selector and DF1, DH-485, or user protocol support
Technical Specifications
- Power Supply: 20.4–28.8 VDC; 0–120 mA current consumption at 24V
- Inrush Current: Maximum 200 mA
- Isolation Voltage: 500 VDC for 1 minute
- Operating Temperature: 0–60°C (32–140°F)
- Storage Temperature: −40–85°C (−40–185°F)
- Relative Humidity: 5–95% noncondensing
- Network Capacity: 32 nodes maximum per multidrop DH-485 network
- Network Length: 1,219 m (4,000 ft) maximum per multidrop network
- Weight: 0.761 lb
- Certifications: C-TICK, CE, CSA, GOST, KC, MARINE
- Communication Ports: Two RS-232 (DB-9 and 8-pin mini-DIN) and one DH-485
Typical Applications
The 1761-NET-AIC is widely used in legacy and modern automation systems where communication bridging between different network protocols is required. Common applications include:
- Connecting older SLC 500 or MicroLogix controllers to modern DF1-based devices
- Extending DH-485 networks across geographically dispersed facilities
- Providing RS-232 to RS-485 conversion for HMIs, modems, and programming terminals
- Isolating serial communication lines in noisy industrial environments
- System integration where multiple communication protocols must coexist
Compatibility & Replacements
Compatible With
- MicroLogix 1000, 1200, and 1500 controllers
- SLC 5/01, 5/02, and 5/03 processors
- SLC 500 family controllers
- Allen-Bradley PanelView terminals (300 and higher)
- DF1 full-duplex and half-duplex user mode protocols
- DH-485 multidrop networks
- RS-232 serial devices and modems
Replaces / Drop-In Replacement For
The 1761-NET-AIC serves as a direct replacement for earlier AIC+ interface converters in MicroLogix and SLC systems. Verify compatibility with your system integrator before ordering to ensure the communication protocol and network topology match your application.
Works With
- RSLogix 5 and RSLogix 500 programming environments
- RSLogix Emulate 500 software simulation
- Studio 5000 Logix Designer (for connected configuration)
- DH-485 Data Highway communication protocol
- DF1 serial protocol (full-duplex and half-duplex)
- Allen-Bradley hand-held programmers (HHP)
- User-defined serial protocols in ASCII mode
