9
Introduction
12345 6Serial Ports
IOLAN+
POWER
102
NET 1 2
Figure 4: Hardware description for IOLAN+ 102/104
1 Power Indicator
2 Network indicator
3 Reset switch cover
4 Port activity indicators
5 10BASE-T socket
6 Power input socket
RS-232/RS-422
Functionally, the difference between RS-232 and RS-422
versions is the absence of support for hardware flow control
lines (RTS and CTS) and modem control lines (DSR, DTR and
DCD) in the RS-422 version. The performance and support
for 115.2k baud are unaffected by the different serial ports.
RS-422 uses differential signalling and is capable of handling
longer distance due to superior noise immunity when
installed with suitable cabling.
Software
description
The IOLAN+ comes with the Perle CD. This CD contains
the latest ‘released’ firmware and the redirector software for
Unix systems called
ioland
. The firmware is a backup copy
and generally not used. The
ioland
software is used for
setting up printers and dial-out modems on Unix.
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