ABB S800 I/O User Manual page 74

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Connector for Optical ModuleBus (TB810/TB811). Fiber optic interface, one
transmit and one receive connection.
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See Section A.2, CI820 Fieldbus Communications Interface (FCI)
CI820 FCIs.
70
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1
2 TD
3 RD
4 -
5 SG
6 -
7 RDA
8 TDA
9 -
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Transmit Data channel B
Receive Data channel B
-
Signal Ground
-
Receive Data channel A
(for debugging only)
Transmit Data channel A
(for debugging only)
-
for a block diagram with the
3BSE 020 925R101