ABB S800 Product Manual page 74

Fieldbus Communication Interface
Figure 27
operation.
Figure 27. Redundant CI820 FCIs and TB815 Interconnection Unit Layout
Figure 28
ModuleBus and are used for single I/O modules. TU846 has two ModuleBuses and
are used for redundant I/O modules.
74
shows the TB815 configured with two CI820 FCIs for redundant
F R
P
T1 T2
PR
DU
SERVICE
STN. ADDR
5
4 6
3 7
x 10
2 8
1
9
0
5
4 6
3 7
x 1
2 8
CI820 TB815
1
9
0
SWX.X/Y
L+ L+ SA
AF100
SB
L- L-
+
-
SH
SH
shows the MTU TU847 (TU846) with redundant CI840. TU847 has one
M
O
D
T1
U
L
PR
E
B
U
S
SERVICE
CI820
SWX.X/Y
L+ L+ SA
L- L- SB
Tx
Rx
Section 2 Product Description
R
F
P
T2
DU
STN. ADDR
5
4 6
3 7
x 10
2 8
1
9
0
5
4 6
3 7
x 1
2 8
1
9
0
AF100
+
-
SH
SH
3BSE015969-600 A