xxiv
Application Precautions
5
• Always turn OFF the power supply to the NSJ Controller before attempt-
ing any of the following. Not turning OFF the power supply may result in
malfunction or electric shock.
• Mounting or dismounting Power Supply Units, I/O Units, or any other
Units.
• Assembling the Units or Racks.
• Setting DIP switches or rotary switches.
• Connecting cables or wiring the system.
• Connecting or disconnecting the connectors.
!Caution
Failure to abide by the following precautions could lead to faulty operation of
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 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 minimal voltage fluctuation that provides a
stable output even if the power supply input is interrupted for 10 ms. The
DC power supply must also have reinforced or double insulation.
Rated power supply voltage: 24 VDC (Allowable range: 20.4 to 27.6 VDC)
Capacity for NSJ12, NSJ10, or NSJ8: 30 W min
Capacity for NSJ5-TQ: 22 W min.
Capacity for NSJ5-SQ: 21 W min.
• Connect power to the power terminal block using twisted-pair power lines
with a cross-sectional area of at least 2 mm
2
and always using M3.5
crimp terminals. The correct tightening torque for the terminal block is
0.8 N·m.
• To conform to the Low Voltage Directive in the EC Directives, use a power
supply with reinforced insulation for Expansion Racks.
