LINK Systems LinkNet I - Manual (Page 8)

LinkNet
2.2
manual rev 2.1 March 25, 1999
At the computer, an RS232 to RS485 converter
is necessary. This converts the standard serial port
on the host computer to a differential serial port
suitable for electrically noisy industrial
environments. Link makes an RS232 to RS485
converter specifically for this purpose with
termination resistors built in that provide for reliable
communications.
The computer that runs the network should be
capable of running Windows 95, Windows 98, or
Windows NT 4.0 (service pack 4 or higher).
Suggested computer is at least a Pentium II
333MHz with 32 MB of memory, 4GB of hard disk
space, Super VGA with resolution of 800 by 600 or
better, mouse, and at least one spare RS-232 port.
The network wiring should be Belden 8103 or
equivalent (three twisted pairs and a shield) and
should not exceed 4000 ft (unless using a repeater).