Point
to point communication is the most common application
for Westermo products. In its simplest form, it consists
for example of a PC connected to a serial printer. In
more complex systems, it can be an entire star network
with numerous point to point connections. The advantage
with point to point communication is that it eliminates
the risk of data collisions and that the system is less
vulnerable since a fault in a single line will not affect
traffic between other units. It also has the disadvantage
of being more expensive to install and more complex to
change and expand. The communication between two short
haul modems requires a 4-wire twisted pair cable and
offers a transmission range of up to 18 km (depending
on data rates). If there is only a 2-wire cable available
it is possible to use our telephone modems to provide
transmission ranges of up to 25 km. It is also possible
to use our interface converters (RS-485) for 2-wire transmission
but in this case it is only possible to communicate half
duplex.
Gross Automation, 1725 S. Johnson Rd., New
Berlin WI 53146
262-446-0000 FAX 262-446-0300
