14 USB-COM-Si-M – Product Manual
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6.
Notes, Tips, and Warnings
Note
Note: Sometimes, when operating in RS-422 or RS-485, it is necessary to
configure termination and biasing of the data transmission lines. Generally
this must be done in the cabling, since this depends on the installation of
connections. Before applying the option, check your cable specification for
proper impedance matching.
Biasing of data lines must only occur at a single point anywhere in the
cabling. USB-2COMi-SI-M provides biasing for ease of installation. Please be
sure to disable this inside the unit, if your cabling already provides biasing.
Termination must not be installed in the middle of the cable. It is only
permitted at both ends. Since a computer controlled serial port is almost
always at one end of the cable, termination is enabled by default.
Reference section 2.1
Note: if you have more than one USB Serial Port (COMx) installed in your PC,
you need to repeat from step 5 to step 6 to delete the driver software for
each port.
Reference section 5, step 6
Note: if you have more than one USB Serial Converter installed in your PC,
you need to repeat step 7 and step 8 to delete the driver software for all
devices.
Reference section 5, step 8
Tip
N/A
Warning
N/A
Safety
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Read the entire Product Manual before implementing this product for
your application. This manual contains important information about
