User`s manual

Part names and settings Base units
MELSEC System Q, Hardware 8 – 11
8.3.3 Connection and disconnection of extension cable
Instructions for handling an extension cable:
● Connect the extension cable to the base unit with the base cover installed to the base unit.
After you have set the extension number to the extension base unit, reinstall and screw the
base cover.
To connect an extension cable to the main base unit, remove the portion under the OUT
characters on the base cover. This also applies to a case where an extension cable is
connected to the OUT side connector of the extension base unit.
Remove the cover from the IN connector of the extension base unit.
● Do not squeeze the extension cable.
● When connecting or disconnecting an extension cable, do not hold the ferrite cores mounted
at both ends of the cable. Only hold the connector part of the cable (refer to the following
figure). Holding the ferrite core may cause a cable disconnection in the connector.
Also, if the ferrite core position is shifted, the characteristic will change. When handling the
cable, do not to shift the ferrite core position.
NOTE Always plug the OUT side connector of a base unit and the IN side connector of the next
base unit with an extension cable.
The system will not operate properly if the extension cable is connected in the form of IN to
IN, OUT to OUT or IN to OUT.
Fig. 8-8:
Hold the connector part of the extension
cable
Main base unit
OUT side
Open the base cover with
a flat blade screwdriver
Remove the cover
from the IN
connector
Extension base unit