Prosoft-technology MVI69-ADM Bedienungsanleitung Seite 22

  • Herunterladen
  • Zu meinen Handbüchern hinzufügen
  • Drucken
  • Seite
    / 342
  • Inhaltsverzeichnis
  • LESEZEICHEN
  • Bewertet. / 5. Basierend auf Kundenbewertungen
Seitenansicht 21
Preparing the MVI-ADM Module MVI-ADM 'C' Programmable
Developer's Guide 'C' Programmable Application Development Module
Page 22 of 342 ProSoft Technology, Inc.
February 20, 2013
2.4.3 RS-422
The RS-422 interface requires a single four or five wire cable. The Common
connection is optional, depending on the RS-422 network devices used. The
cable required for this interface is shown below:
2.4.4 RS-485 Application Port(s)
The RS-485 interface requires a single two or three wire cable. The Common
connection is optional, depending on the RS-485 network devices used. The
cable required for this interface is shown below:
Note: Terminating resistors are generally not required on the RS-485 network, unless you are
experiencing communication problems that can be attributed to signal echoes or reflections. In
these cases, installing a 120-ohm terminating resistor between pins 1 and 8 on the module
connector end of the RS-485 line may improve communication quality.
RS-485 and RS-422 Tip
If communication in the RS-422 or RS-485 mode does not work at first, despite
all attempts, try switching termination polarities. Some manufacturers interpret +
and -, or A and B, polarities differently.
Seitenansicht 21
1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 341 342

Kommentare zu diesen Handbüchern

Keine Kommentare