Serial Control of the VA-8xl or VA-16xl
11
6.2.1.1 Preparing the RS-232 Port
1
on a Set of Units
To connect a PC to a set of VA-8xl or VA-16xl units, do not use a
null-modem adapter. Do the following
2
:
1.
Prepare the RS-232 DB9F connector (A), by connecting PIN 4 to PIN 6
and connecting PINS 8, 7, and 1 together.
2.
Attach the RS-232 DB9F connector (A) to another RS-232 DB9M
connector (B) by connecting PIN 5 to PIN 5, PIN 3 to PIN 2, and PIN 2 to
PIN 3.
3.
Connect the RS-232 DB9F connector (A) to your PC’s RS-232 DB9M
port.
4.
Attach the RS-232 DB9M connector (B) to another RS-232 DB9M
connector (C), by connecting PIN 5 to PIN 5, PIN 8 to PIN 3, PIN 9 to PIN 2.
5.
Connect the RS-232 DB9M connector (B) to the RS-232 DB9F port on
the first VA-8xl or VA-16xl unit.
6.
Attach the RS-232 DB9M connector (C) to another RS-232 DB9M
connector, if required, by connecting PIN 5 to PIN 5, PIN 8 to PIN 3, PIN 9 to
PIN 2.
7.
Connect the RS-232 DB9M connector (C) to the RS-232 DB9F port on
the next VA-8xl or VA-16xl unit.
Figure 9: Preparing the RS-232 Connectors
1 Choose the RS-232 control interface, for a range of about 25 meters used for a point-to-point connection
2 By preparing a special RS-232 cable (not required when connecting a stand-alone VA-8xl or VA-16xl unit (see section
6.1.1)), as illustrated in Figure 8 and Figure 9