Module Termination Units - ABB S800 I/O User Manual

The TB820 ModuleBus Modem provides 24V d.c. short circuit proof (from the
source) and an isolated, short circuit proof 5 V dc power to the cluster's I/O
modules by way of the electrical ModuleBus connection. One power source (single
or redundant 24V d.c.) can be connected to the power terminals (L+ & L-).
Redundant power supply can be supervised via inputs SA and SB.
Please refer to specifications in
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The Module Termination Units (MTU) are passive base units used to house the I/O
modules. They contain the process wiring terminals and a section of the
ModuleBus.
Please refer to specifications in
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more information.
3BSE 020 923R101
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58 mm (2.3")
F
R
P
ORx1 ORx2
ERx
CLUSTER
5
4 6
3 7
2
1
TB820
L+ L+ SA
L- L- SB
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Appendix A, References
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122 mm (4.8")
for more information.
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and
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for
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