Contemporary Controls USB22 Series Kurulum Kılavuzu - Sayfa 5

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INSTALLATION

SOFTWARE

(Windows

2000/XP/Vista/7)

When a USB cable first connects the NIM to a PC and you are prompted

for a driver, follow the instructions that appear when you click on the

Software Developer Kit link at the following URL:

www.ccontrols.com/support/usb22.htm

INDICATOR LIGHTS

ARCNET: This will flash green in response to any ARCNET activity.

USB: This LED glows green so long as a valid active USB

connection exists to an attached computer.

FIELD CONNECTIONS

The USB22 is available in four models that vary by transceiver type for

connecting to an ARCNET LAN via a certain kind of cable. Each model's

transceiver is identified by the suffix (-4000, -485, -CXB or -TB5)

separated from the main number by a hyphen.

-CXB Coaxial Bus

Generally two types of coaxial cables are used with ARCNET: RG-62/u

and RG-59/u. RG-62/u is recommended because it matches the 93-ohm

-CXB impedance and can thus achieve the maximum 1000-foot segment

distance. Although RG-59/u does not match the -CXB impedance (it is

75-ohm cable), it will still work, but the segment length may be limited.

Never attach coax cable directly to the USB22-CXB; always use the

provided BNC "T" connector. The "T" connector allows the coaxial bus

to continue as shown with device A in Figure 4. Apply the provided

93-ohm BNC terminator to the "T" if the USB22 terminates the coax in

an end-of-line situation as shown with device B in Figure 4.

Figure 4 — Possible Connections for the USB22-CXB

TD040900-0IJ