User`s manual

Use of I/O Units, INTERBUS Adapters and Branch Interface Modules
28
Potential Isolation of the I/O Modules (with Bus Adapter 170 INT 110 03)
Potential
isolation of the
I/O modules
The figure illustrates the potential relationships between two I/O modules, if these
have the 170 INT 110 03 bus adapter:
The fields in the same shade of gray have the same reference potential.
Electronic
Plug
12 pin
GND
Vcc
DC/DC
Convertor
VCX
DSUB
9 pin OUT
DSUB
9 pin IN
INTERBUS
INTERBUS
Interface for
I/O unit
Electronic
Plug
12 pin
GND
Vcc
DC/DC
Convertor
VCX
DSUB
9 pin OUT
DSUB
9 pin IN
INTERBUS
INTERBUS
Interface for
I/O unit
I/O module n I/O module n + 1