Three Or More Controllers; Serial Network Connection Example - Dual Connection - Teledyne SyriXus 65x Installation And Operation Manual

SyriXus Series Pumps Installation and Operation Guide
Section 8 Serial Interface
SyriXus Series
Controller
Figure 8-2 Serial network connection example - dual connection
Using this arrangement, the number of pumps that can be controlled
by your program essentially doubles.
8.4.3 Three or More
This option was predominantly used by System Developers and Indus-
Controllers
trial Applications Implementers employing multiple banks of pumps
for large scale installations. These developers have switched their
communications schemes to one of the other interface options pri-
marily because of the RS-232-C limitations of speed and cable lengths.
Although the functions still exist in the controller to allow the serial
control of multiple controllers, Teledyne ISCO no longer offers the
interconnection cables for three or more controllers and has discon-
tinued the support of this function. Using this feature is no longer rec-
ommended for new development.
The necessary interconnection cables for this feature are no longer
available; the user would be required to fabricate their own. When
three or more controllers are to be managed by a user's program, one
of the other communication protocols should be used.
Modern personal computer operating systems provide for multiple
serial ports. If three or more controllers are to be controlled by a single
computer, it is suggested that additional controllers be connected
through other serial ports. The users software program could then
open a communications channel with each serial port.
EAR99 Technology Subject to Restrictions Contained on the Cover Page
8-5