
Installation 2
2 - 8
Communications Wiring
Host to I/O PLEXER - RS-232
Figure 2-9 RS-232 Host to I/O Plexer wiring
Host to I/O PLEXER RS-232 communications is limited to a distance of 50 Feet. The
connector for the Host cable, marked Host RS-232 (See fig. 2-5), is a 9 pin female D
submin. Pin assignments for this connector may also be found on the edge of the cover.
The Host connection may be a 9 or 25 pin D submin connector depending on whether the
AT or XT connection is used. A duTec cable can be used for this purpose (IOPN-AT,
IOPN-XT, or IOPN-AXT).
In addition to the Host to I/O PLEXER wiring, the installer should confirm that the network
type switches are set in the RS-232/ RPT positions and that both CTS/RTS jumpers are in
the horizontal position as shown. The switches marked “Pull-up” in figure 2-5 should be
left in the “ON” position.
2
When distances greater than 50 feet are encountered the Host must be equipped with
an RS-422/ 485 device
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