Precautions For Safe Use - Omron NB Series Operation Manual

Precautions for Safe Use

• When unpacking the NB Units and the peripheral devices, check carefully for any external scratches
or other damages. Also, shake the Units gently and check for any abnormal sound.
• The NB Unit must be installed in a control panel.
• The mounting panel must be between 1.6 and 4.8 mm thick. Tighten the Mounting Brackets evenly to
a torque of between 0.5 and 0.6 N m to maintain water and dust resistance. If the tightening torque
exceeds the specified value, or the tightening is not even, deformation of the front panel may occur.
What is more, make sure the panel is not dirty or warped and that it is strong enough to hold the
Units.
• Do not let metal particles enter the Units when preparing the panel.
• Do not connect an AC power supply to the DC power terminals.
• Use a DC power with a slight voltage fluctuation and that will provide a stable output even if the input
is momentarily interrupted for 10 ms.
Rated Power Supply Voltage: DC 24 V (Allowable range DC 20.4 ~ 27.6 V)
• Do not perform a dielectric voltage test.
• Making the connection by using terminal screws crimping on a twisted-pair cable with a crimping
range of 12~26 AWG, and only 6.5 mm of insulation peel of the cable needs to be peeled off. Tighten
the terminal screws at a torque of between 0.3 and 0.5 N m. Make sure the screws are properly
tightened.
• To prevent malfunctions caused by noise, ground the Unit correctly.
• Do not touch the packaging part of the circuit board with your bare hands. Discharge any static
electricity from your body before handling the board.
• When using the No. 6 pin of the serial communication port COM1 connector for a voltage of DC+5V,
make sure the supply equipment's current capacity is below 250mA before using it. The DC+5V
voltage output of the NB unit is +5V±5%, and the maximum current is 250mA. (The serial
communication port COM1 of NB3Q-TW00B and NB3Q-TW01B is unable to output the current.)
• Turn OFF the power supply before connecting or disconnecting cables.
• Always keep the connector screws firmly tightened after the communication cable is connected.
• The maximum tensile load for cables is 30 N. Do not apply loads greater than this.
• Confirm the safety of the system before turning ON or OFF the power supply, or pressing the reset
button.
• The whole system may stop depending on how the power supply is turned ON or OFF. Turn ON/OFF
the power supply according to the specified procedure.
• Reset by pressing the reset button, or restart the power supply, once the DIP switch settings are
changed.
• To ensure the system's safety, make sure to incorporate a program that can confirm the normal
functionality of the NB Unit before running the system.
• Start actual system application only after sufficiently checking screen data, macros and the operation
of the program at the host side.
• Do not press the touch panel with a force greater than 30 N.
• Do not use hard or pointed objects to operate or scrub the screen, otherwise the surface of the
screen may be damaged.
• Confirm the safety of the system before pressing the touch panel.
• Signals from the touch switches may not be input if the touch switches are pressed consecutively at
high speed. Confirm each input before proceeding to the next one.
• Do not accidentally press the touch panel when the backlight is not lit or when the display does not
appear. Make sure of the safety of the system before pressing the touch panel.
• To use numeric input functions safely, always make maximum and minimum limit settings.
• Before initializing screen data, confirm that existing data is backed up at the NB-Designer.
18 NB-series Programmable Terminals NB-Designer Operation Manual(V106)