Owner`s manual

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the main board of the module for each individual port. The factory
default serial interface is EIA-422.
Refer to Figure 29 on previous page and locate the eight jumper
locations for serial interface selection. These jumper locations are
marked on the mechanical layout as JP13 and JP14 for Port 1, JP15
and JP16 for port 2, JP17 and JP18 for Port 3 and JP19 and JP20 for
Port 4.
Each port is configurable for EIA-422 or EIA-232 serial interface by
installing two, 4 position jumpers to either the 422 or 232 position as
marked on the board. The center row of pins for each port will be
occupied by four of the jumper positions and the row of pins for either
422 or 232 will be occupied by the other four positions of these two
jumpers.
IMPORTANT: If the V75 module is installed in the base unit chassis,
remove power from the unit by positioning the On/Off switch to "O"
(off) and unplug the power cord from the AC outlet. Remove the
module by unscrewing the two screws securing it to the back panel
and pull the module out.
14.1.4 V74 AND V75 CABLE/ADAPTER INFORMATION
Refer to the following modular adapter drawings to interface your
computers or terminals to the V74 and the V75 module using EIA-232
serial interface. Use the "...PC-1" adapters in most data acquisition
and control applications where the V74 or V75 will not have modem
connections. Refer to Figure 31 if your computers/terminals have DB-
25 male connectors or to Figure 32 if your computers/terminals have
DE-9 connectors.