ABB S800 I/O - Page 26

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The FCI and ModuleBus Modem are able to supervise the redundant voltage supply.
The supervision function is individually configurable for power supervision of each
I/O station.
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24V d.c. power supply
Supervision 24V A, 24V B
I/O modules
I/O station
FCI
B
A
24V
or ModuleBus Modem
Power
Supply
B
Power
A
Supply