Omron NB3Q-TW**B series Connection Manual page 18

Safety Precautions
WARNING
Do not attempt to take the product apart and do not touch the product inside while the
power is being supplied. Otherwise it may result in electric shock.
Always ensure that the personnel in charge confirm that installation, inspection, and
maintenance were properly performed for the NB Unit.
"Personnel in charge" refers to individuals qualified and responsible for ensuring
safety during machine design, installation, operation, maintenance, and disposal.
Ensure that installation and post-installation checks are performed by personnel in
charge who possess a thorough understanding of the machinery to be installed.
Do not use the input functions of the touch switch, etc. of the NB Unit, in applications
that involve human life, in applications that may result in serious injury, or for
emergency stop switches.
Do not attempt to disassemble, repair, or modify the NB Unit. Otherwise it may impair
the safety functions.
Never press at two or more points on the touch panel of the NB Unit at a time.
Otherwise, it may activate a switch somewhere between the two points.
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NB-series Programmable Terminals Host Connection Manual (V108)