10.4 Removing or inserting the BusAdapter
Note
Replacing a BusAdapter (removing/inserting)
Removing/inserting the BusAdapter under voltage in prohibited.
Automated name assignment during device replacement
The following scenarios during replacement of one of the two components result from
automatically saving the device name on the BusAdapter and the CFU:
CFU unprogrammed
(no device name)
Interface with device name
BusAdapter unprog‐
rammed
(no device name)
Device names not programmed When the supply voltage is switched
on, the device name is copied from
the CFU to the BusAdapter.
BusAdapter with de‐
vice name
When the supply voltage is switched on, the device name is copied from the
BusAdapter to the CFU.
Note:
When a faulty BusAdapter is replaced, make certain that the replacement
BusAdapter has no device name.
10.5 Replacing the CFU
Requirements
● The CFU is de-energized.
● The separate supply of connected field devices is switched off.
● The replacement device is in delivery state. You can find information on this in section
"Restoring the state of delivery (Page 125)".
Replacing the CFU during process operation
If you are using the CFU in a hazardous area, you must observe the following sections:
● Section "Use in hazardous areas (Page 29)"
● Section "Compact Field Unit in the housing for use in a hazardous area (Page 129)"
Servicing and maintenance
10.5 Replacing the CFU
SIMATIC CFU
Commissioning Manual, 08/2019, A5E39252870-AD 117
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