Mitsubishi Electric MELSEC Q Series Reference Manual page 32

(g) Connection of an external power supply
The external power can be directly supplied to the CC-Link IE Controller Network module with external power
supply function. (
Even if a CPU module power goes down in a network, data link will be continued among normally operating
stations without being disrupted at the power-down station. (Loopback does not occur.)
Data link is also continued between failed stations when power failure has occurred on CPU modules on
multiple stations.
External power supply
Control
station
No.1
Normal
station
No.6
External power supply
30
Page 134, Section 4.4.7)
External power supply
Normal
station
No.2
Normal
station
No.5
Down
External power supply
External power supply
Normal
station
No.3
Down
Normal
station
No.4
External power supply
Data link is continued
between failed stations.