Omron NSJ CONTROLLERS - 03-2008 Operation Manual page 23

Application Precautions
!Caution Failure to abide by the following precautions could lead to faulty operation of
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the NSJ Controller or the system, or could damage the NSJ Controller. Always
heed these precautions.
• When opening the package, check the external appearance of the NSJ
Controller to be sure that it has not been damaged. Also, shake the NSJ
Controller gently to check for abnormal sounds.
• Do not attempt to disassemble, repair, or modify any Units.
• Do not drop the product or subject it to excessive vibration or shock.
• Install external breakers and take other safety measures against short-cir-
cuiting in external wiring.
• Take appropriate measures to ensure that the specified power with the
rated voltage and frequency is supplied. Be particularly careful in places
where the power supply is unstable.
• Do not apply a force greater than 100 N on the terminal block when tight-
ening the terminals.
• Do not perform withstand voltage tests on the NSJ Controller.
• The allowable thickness of the panel for mounting is between 1.6 and
4.8 mm. Secure the mounting bracket with a uniform tightening torque of
between 0.5 and 0.6 N to keep the NSJ Controller waterproof and dust-
proof. The front sheet may become distorted if the tightening torque is
more than the specified limit or not uniform. Always use a panel that is
clean, undistorted, and strong enough to adequately withstand mounting
the NSJ Controller.
• Do not allow metal particles to enter the NSJ Controller while work is
being performed on the panel.
• Do not connect an AC power supply to the power terminals on the NSJ
Controller.
• Use a DC power supply with low voltage fluctuation.
• Connect power to the power terminal block using twisted-pair power lines
with a cross-sectional area of at least 2 mm
crimp terminals. The correct tightening torque for the terminal block is
0.8 N.
• To conform to the Low Voltage Directive in the EC Directives, use a power
supply with reinforced insulation for Expansion Racks.
• Do not pull on the cables or bend the cables beyond their natural limit.
Doing either of these may break the cables.
• Do not place objects on top of the cables or other wiring lines. Doing so
may break the cables.
• Before touching a Unit, be sure to first touch a grounded metallic object in
order to discharge any static build-up. Not doing so may result in malfunc-
tion or damage.
• When transporting or storing circuit boards, cover them in antistatic mate-
rial to protect LSIs, ICs, and other components from static electricity and
maintain the proper storage temperature.
• Do not touch circuit boards or the components mounted to them with your
bare hands. There are sharp leads and other parts on the boards that
may cause injury if handled improperly.
• Mount Units only after checking terminal blocks and connectors com-
pletely.
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and always using M3.5
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