Application Precautions - Omron NQ HMI Getting Started Manual

Application precautions

1-5 Application precautions
!WARNING
!Caution
Failure to abide by the following precautions could lead to serious or possibly fatal
injury. Always read these precautions.
• Always connect to a ground of 100 Ohm or less when installing the HMI.
Not doing so may result in electric shock. Always connect to a ground of
100 Ohm or less when short-circuiting the functional ground and line
ground terminals of the Power Supply Unit, in particular.
• Always turn OFF the power supply to the HMI before attempting any of the
following. Not turning OFF the power supply may result in malfunction or
electric shock.
- Mounting or dismounting Power Supply units and Control Units
- Assembling option boards on HMI
- Replace the battery
- Setting switches
- Connecting or wiring the cables
- Connecting or disconnecting the connectors
• Check the user program for proper execution before actually running it on
the HMI. Not checking the program may result in an unexpected operation.
Failure to abide by the following precautions could lead to faulty operation of the HMI or
the system, or could damage the HMI. Always read these precautions.
• Install external breakers and take other safety measures against short-
circuiting in external wiring. Not observing this may result in burning.
• Be sure that all the terminal screws and cable connector screws are
tightened to the torque specified in the relevant manuals. Incorrect
tightening torque may result in malfunction.
• Mount the HMI only after checking the connectors and terminal blocks
completely.
• Before touching the HMI, be sure to first touch a grounded metallic object in
order to discharge any static built-up. Not doing so may result in
malfunction or damage.
• Be sure that the terminal blocks, connectors, and other items with locking
devices are properly locked into place. Improper locking may result in
malfunction.
• Wire correctly according to the specified procedures.
• Always use the power supply voltage specified in the operation manuals.
An Incorrect voltage may result in malfunction or burning.
• Do not connect an AC power supply to the NQ-series HMI power terminals,
an incorrect power supply may result in burning.
• 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. An incorrect power supply may result
in malfunction.
• Use crimp terminals for wiring. Do not connect bare stranded wires directly
to terminals. Connection of bare stranded wires may result in burning.
• Disconnect the functional ground terminal when performing withstand
voltage tests. Not disconnecting the functional ground terminal may result
in burning.
• Wire correctly and double-check all the wiring or the setting switches
before turning ON the power supply. Incorrect wiring may result in burning.
• Check that the switches and settings are properly set before starting
operation.
Section 1-5
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