
Introduction 1
1 - 7
Specifications
Network Communications:
duTec supports several standards for transmitting serialized I/O data between the
Host computer and the I/O PLEXERs. In addition to hardwiring, built in modem
control lines allow the use of telephone, fiber optic, and radio modems at baud
rates of up to 38,400.
Maximum Distance
Serial Link
Feet
Meters
RS-232
50
15
RS-422
5,000
1,524
RS-485
5,000
1,524
Modem
Unlimited
Unlimited
In addition to network communications, a separate local RS-232 port, with the
same baud rate capabilities, provides the means for Host communications with
local serial devices such as keypads, printers, or displays. Actual interaction with
these devices is controlled via the Host computer in the form of character strings
embedded in standard protocol instructions.
It is not possible to directly access the analog and digital I/O data from the local
RS-232 Port. However this data can be obtained by the Host computer and
relayed to the auxiliary device connected to the local RS-232 port. Device pinout
for this port can be found on the cover plate. Data format is 8 Databits, 1-Stop
and no parity.
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