Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 126

4 SETUP AND PROCEDURES BEFORE STARTING THE OPERATION
Insert the plug by aligning the groove of
the plug with the projection of the jack.
Push the plug in until the plug fixing hole
catches the hook of the jack.
Pull the plug lightly in the direction of the
arrow to make sure that it is securely
connected.
Press the fixed sections of the plug in
the directions of the arrows and pull out
the plug.
Put the covers, which were attached to
the plug before installation, back on both
the plug and jack to store.
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(2) Cable connection
(a) How to connect the cable
Connect the OUT and IN terminals with an optical fiber cables as shown
below.
Note that there is no need to connect the cables in the order of station
numbers.
Any station number can be assigned as the control station.
Control station
Station Station
No. 1 No. 1
QCPU QJ71
LP21
IN
(b) Installing the optical fiber cable
The following shows how to install the optical fiber cable:
Start (Installation)
Turn OFF the power.
Complete
(c) Removing the optical fiber cable
The following shows how to remove the optical fiber cable:
Start (Removal)
Turn OFF the power.
Complete
Normal station
Station
No. 2
QCPU QJ71
LP21
OUT IN OUT
Network module
MELSEC-Q
Normal station
Station
No. n n ≤ 64
QCPU QJ71
LP21
IN OUT
Jack
Projection
Plug
Groove
Plug
Cover
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