Operating Instructions
IS1 PROFIBUS 3.00 E
- Technical alterations reserved -
26
PROFIBUS DP interface for IS1+
2.10.1.3
PNO redundancy without class 1 master support
The operation of redundant IS1 CPUs is also possible without support by the DP master defined in the PNO
slave redundancy specification.
Topology Example FR:
PLC /
DCS
D
P
Ma
s
te
r
IS1
C
P
U
C
P
U
I/O
IS1
C
P
U
C
P
U
I/O
Ex Zone 1
PLC /
DCS
D
P
Ma
s
te
r
IS1
C
P
U
C
P
U
I/O
IS1
C
P
U
C
P
U
I/O
9185 or 9186
Fieldbus Isolating Repeater
X1
X1
X1
X1
X1
X1
X1
X1
PLC /
DCS
DP
M
(
p
rim
a
ry
)
IS1
C
P
U
C
P
U
I/O
IS1
C
P
U
C
P
U
I/O
Ex Zone 1
9185 or 9186 Fieldbus Isolating Repeater
DP
M
(
b
a
cku
p
)
X1
X1
X1
X1
optional DP Master redundancy