Mitsubishi MELSEC-Q Series User Manual page 20

2 SYSTEM CONFIGURATION
Master module
(Data link status)
Remote I/O module
(Power status)
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(2) Number of drop line stages
The drop line in the CC-Link/LT system may be branched in up to two stages.
It cannot be branched in three or more stages.
Remote
Remote
station
Third drop line branch stage: cannot be wired.
Remote
station
(3) Conditions for setting of dedicated power supply or power supply
adapter
The conditions for the setting of a dedicated power supply or power supply
adapter for the CC-Link/LT vary depending on the devices to be connected and
the wiring length.
See the User's Manual of the dedicated power supply or power supply adapter
for the conditions.
POINT
Always connect the dedicated power supply or power supply adapter to the trunk
line. (Connection to branch lines is not allowed.)
(4) Prevention of faulty input/output from remote I/O module
To prevent faulty input/output from remote I/O modules, pay attention to the
following when designing the system.
(a) When power is ON or OFF
Turn ON the remote I/O module (Turn on the dedicated power supply or
power supply adapter) before starting the data link.
Also, stop the data link before turning OFF the remote I/O module (Turning
off the dedicated power supply or power supply adapter).
Executed
Stopped
ON
OFF
station
Trunk line
Drop line
Data link start
MELSEC-Q
Data link stop
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