supplies the power to operate it’s side of the D232. On
the other side, a small amount of power will be drawn
from the serial port of the connected device.
Connection
On the RS232 side, the D232 is configured as a DTE
interface. This means that it can be connected to a
modem directly without the use of a null modem cable.
The D232 has a 9 pin male D connector (DB9M). If you
want to connect to a computer directly you will need a
null modem cable. To extend the length of an existing
cable a minimum of three wires are needed : TX (pin
3), RX (pin 2) and Signal Ground (pin 5) [Note: pin
numbers are for the D232 end of the cable]. Hand-
shake lines are not used for flow control.
On the Dingo side, connection is made via 6 wire
shielded cable and modular telephone style connec-
tors. A ‘Dcab’ cable is supplied in the box. Longer
cables can be supplied or the user can make their own
if they have the correct tools. Orient the connectors so
that pin 1 at one end goes to pin 1 at the other end.
(When you hold both connectors so that they are facing
you and the same way up, then the same color wire will
be on the same side -copy the cable supplied.)
To connect two or more accessories to a controller, use
a US standard 6 position telephone double adaptor
and a Dcab cable as shown above. Only one D232 or
DUSB can be used in a system.
Software
Windows software is supplied on the USB memory
stick in the box. This can also be downloaded from
www.plasmatronics.com.au
Protocol
The D232 uses a subset of the Modbus RTU protocol
and is implemented as a slave. It does not send data
to the computer unless requested. The computer can
D232
DSA
2F to 1M Adaptor
Dcab CABLE
Dcab CABLE
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