VIPA System 200V IM Series, Manual

Page: 146 / 348

Chapter 4 Interbus
Manual VIPA System 200V
4-10 HB97E - IM - Rev. 06/29
Connection to Interbus
DO
/DO
COM
DI
shield
Interbus coupler n:
Outbound interface Interbus coupler n+1:
Inbound interface
1
6
3
2
7
/DI
COM
DI
DO
/DO
/DI
1
6
3
2
7
shield
8
9
+5V
n/c
5
9
+5V
RBST
Due to the fact that Interbus remote bus segments can be distributed over
large areas, it is necessary that individual segments are isolated galvani-
cally to prevent problems that could be caused by potential differences.
However, according to the recommendations of the Interbus club, it is
sufficient to provide galvanic isolation between inbound remote bus
interfaces and the remainder of the circuitry. For this reason the outbound
remote bus interface is at the same potential as the rest of the circuitry and
the backplane bus.
Use metallic covers for plugs and apply the screen of the cable to the plug
case.
Note!
Please ensure that the link between pins 5 and 9 is installed on the plug for
”subsequent modules” as any subsequent slaves would not be detected if
the link was not present!
Interbus wiring
requirements
Isolation