ABB S800 I/O - Page 87

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The TB820 ModuleBus Modem needs to be connected to the CI810/CI830 FCI, or
the TB815 Interconnection Unit, and have an I/O cluster address selected. It is also
connected to a 24V d.c. power source to provide power to the I/O modules of the
cluster.
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1
2
7
5
3
4
6
Cluster Address
Switch
(Address 4 shown)
CLUSTER
SB
SA
L-
L+ L+
L-
FR
ORx2ORx1
P
TB820
ERx
Optical ModuleBus
Interface Connector (X4, X5)
X4 X5
Rx
Tx
Rx
Tx