AI-USB Serie - ARCnet HUB & USB Adapter

Der AI-USB-485(X) von Contemporary Controls ist ein USB Hub/Adapter.
Der AI-USB-485(X) von Contemporary Controls ist ein USB Hub/Adapter.
Der AI-USB-CXS von Contemporary Controls ist ein USB Hub/Adapter.
Die ARCnet Hubs & USB Adapter der AI-USB Serie von Contemporary Controls sind ausgetsattet mit einem COM20022 ARCnet Controller, 128 kbytes Empfangsbuffer, LED Statusindikatoren, 2 externen Hub Ports und Koaxial-/ oder Twisted-Pair-Technologie.

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AI-USB Series - ARCnet Hub & USB Adapter

The AI-USB hub alters how you connect to an ARCNET network. It gives you easy access to the network via a PC without removing the cover. It helps to prevent any service technician aggravation because it eliminates the installation of an ARCNET card in the PC.

This is an active hub with similar hub functionality as an AI Series hub, but it allows access to the Universal Serial Bus (USB) to a host PC. It has three ports — two external and one internal. The internal port has a connection to a USB adapter (network interface module) resident in the AI-USB. The USB connection is brought out to the front panel so a laptop or desktop computer can gain Plug-and-Play (PnP) access to an ARCNET network.

This unit conforms to the high-speed USB 2.0 standard. It is a very fast and convenient method of accessing an ARCNET network without the need of removing a cover and installing a network interface module into a computer.

Today, most computers are equipped with a USB port so it is only necessary to make a connection between the computer and the AI-USB. It also operates with the earlier lower-speed USB 1.1 standard.

An ideal application for the AI-USB is temporary access to an ARCNET network by simply hooking from a laptop computer using its USB port. With the AI-USB permanently connected to the ARCNET network, field wiring is not disturbed when attaching the USB cable. Thus, an ARCNET network can be monitored, stations configured and troubleshooting can be accomplished with minimal disruption to the network. With two external hub ports, the AI-USB can be inserted between two bus segments and function as a bus extender. Models are available for coaxial bus, twisted-pair bus and both AC- and DC-coupled EIA-485.


  • Functions as both a hub and a USB interface to the ARCNET network
  • Exchanges ARCNET packets with a USB-connected computer
  • Two external hub ports for expansion
  • Supports coaxial and twisted-pair including AC- and DC-coupled EIA-485
  • Operates with either the USB 1.1 or 2.0 standard
  • Incorporates a COM20022 ARCNET controller chip
  • LEDs identify reconfigurations and port activity
  • Minimizes bit jitter with precision delay-line timing
  • Low-voltage AC- or DC-powered
  • CE Mark
  • RoHS compliant
  • Embedded microcontroller provides 128 Kbytes of receiver buffering


-CXS Coaxial Star

Most ARCNET networks use RG-62/u coaxial cable (with BNC connectors) in a star topology where each NIM connects directly to a port on an AI hub. But the coaxial star configuration provides the longest coaxial distance and simplifies troubleshooting. This port terminates a coaxial segment without requiring a passive terminator.

-TB5 Twisted-Pair Bus

Twisted-pair can be used in a bus and dual RJ-45 jacks support a “daisy-chain”. Distances and node count are limited. Passive terminators are inserted in unused jacks at each far end of the segment. Shielded as well

as unshielded cable is supported.

-485 DC-Coupled EIA-485

A shielded or unshielded EIA-485 twisted-pair can support several nodes over a limited distance. Screw terminals permit a “daisy-chain” segment. EIA-485 offers a hubless solution but with limited distance and low common mode breakdown voltage. Segments can be extended with AI repeaters and hubs and each port accommodates failsafe bias and cable termination.

-485X AC-Coupled EIA-485

The EIA-485 transformer-coupled option provides the convenience of EIA-485 connectivity — but with a much higher common mode breakdown voltage. The -485X option eliminates the phase reversal issue of the -485 option, but distance and node count are lower.