ABB S800 I/O Manual page 79

Section 5 Maintenance
Module Type - Settings
Switch setting for PROFIBUS
address
CI801
FCI
3BSE020926-600
Table 18. Replacement of S800 I/O Modules
Station Addre
Switches
Communication Module Replacement
Comments
Cannot be replaced with power applied.
Needs space to the left in order to be removed.
In normal operation mode, before a CI801 is
replaced, the supply to the S800 I/O is to be
switched off. Power connections can be removed
by pulling the header terminals out of the unit.
Optical ModuleBus Port TB842 can not be removed
with power applied.
If a TB842 connected to a CI801 shall be changed
in a running system, TB806 has to be disconnected
from the FCI first.
The fuse for ModuleBus 24 V can be changed if the
top cover of the module is removed. For fuse type,
see CI801 Technical Data.
Fieldbus connections can be removed by pulling
the D-way connector out of the unit.
If the last CI801 on a PROFIBUS segment
supplies an active termination in the cable
connector, disconnection of the power
supply or the PROFIBUS cable to CI801
cannot be done without disrupting the bus.
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