Mitsubishi MELSEC-QnA Series User Manual page 3

[INSTALLATION PRECAUTIONS]
Do not directly touch the printed circuit board, the conducting parts and
electronic parts of the module. It may cause damage or erroneous operation.
Before handling the module, touch a grounded metal object to discharge the
static electricity from the human body. Failure to do so may cause
malfunction or failure of the module.
[WIRING PRECAUTIONS]
Before installation or wiring, be sure to shut off all phases of the external
power supply used by the system.
Failure to do so may cause electric shocks or damage the product.
Solder the coaxial cable connector properly. Incomplete soldering may
cause a malfunction.
Be sure there are no foreign substances such as sawdust or wiring debris
inside the module. Such debris could cause fires, damage, or erroneous
operation.
Make sure to place the communication and power cables into a duct or
fasten them using a clamp.
Cables not placed in the duct or not clamped may hang or shift, allowing
them to be accidentally pulled, which may cause a module malfunction and
cable damage.
When removing the communication cable or power cables from the module,
do not pull the cable. When removing the cable with a connector, hold the
connector on the side that is connected to the module. When removing the
cable connected to the terminal block, first loosen the screws on the terminal
block. Pulling the cable that is still connected to the module may cause
malfunction or damage to the module or cable.
CAUTION
DANGER
CAUTION
A-2