Buy now: Allen-Bradley 1761-NET-AIC Advanced Interface Converter (AIC+)
Atlantechdrives provides you the 1761-NET-AIC, popularly known as the AIC+. This module is a high-performance communication interface that provides an isolated link between Allen-Bradley controllers and DH-485 networks. It is a critical accessory for networking MicroLogix, SLC 500, and PLC-5 controllers, as well as providing a stable RS-232 to RS-485 conversion for industrial data exchange.
- Ports: 8-pin Mini-DIN (RS-232), 9-pin D-shell (RS-232), and 6-pin Phoenix (RS-485/DH-485)
- Isolation: Full galvanic isolation between all ports
- Power: Powered by the MicroLogix port or an external 24V DC supply
- Baud Rates: Supports 600 to 19.2k baud
- Mounting: DIN-rail or panel mount
Technical Performance: Securing Your DH-485 Network
The 1761-NET-AIC is engineered to solve the most common communication challenges in industrial environments: ground loops and signal interference. By providing full electrical isolation between the connected PLC and the network trunk, the AIC+ protects your expensive hardware from voltage transients and common-mode noise that can travel across long DH-485 cable runs. It acts as a multi-port bridge, allowing you to connect a PC for programming via the DB9 port while the PLC remains connected to the network via the Mini-DIN port. This «Advanced» version (AIC+) is the industry standard for creating robust, deterministic serial networks that connect legacy machinery to modern data collection systems.
Expert Tips: Powering and Termination Best Practices
When installing the 1761-NET-AIC, the source of power is the most frequent point of confusion. If connected to a MicroLogix controller via the 1761-CBL-AM00 cable, the AIC+ draws its 24V DC directly from the PLC. However, if you are using it with an SLC 5/03 or a PC, you **must** provide an external 24V DC power supply to the Phoenix terminal. For the DH-485 network to function correctly, ensure that the network is terminated at both ends of the trunk. The AIC+ does not have a built-in termination resistor, so an external 120-ohm resistor should be used across the ‘A’ and ‘B’ lines at the physical ends of the network to prevent signal reflections.
Maintenance and Signal Integrity Audits
The 1761-NET-AIC is a solid-state module with a long service life, but its physical connections are subject to wear. Periodically inspect the 6-pin Phoenix connector for loose wires and the 8-pin mini-DIN for bent pins. In environments with high vibration, ensure the DIN-rail clips are secure. If your network experiences «Missing Nodes,» the AIC+ is the best place to start troubleshooting: check the diagnostic LEDs on the unit to verify power and data traffic. By sourcing original 1761-NET-AIC modules from Atlantechdrives, you ensure that your legacy network maintains the galvanic isolation necessary to prevent catastrophic port failures during an electrical fault.
FAQs
Q: Can the 1761-NET-AIC be used as a standard RS-232 to RS-485 converter?
A: Yes, it can function as a high-quality isolated converter for various industrial serial protocols, not just DH-485.
Q: What cable do I need to connect a PC to the AIC+?
A: You can use a standard null-modem DB9 cable connected to the Port 1 of the AIC+.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
This RS-232 to RS-485 isolator is the standard tool for networking multiple MicroLogix 1000 controllers in a DH-485 loop.
