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Precautions for Safe Use
1. When unpacking the Units, check carefully for any external scratches or other damage.
Also, shake the Units gently and check for any abnormal sound.
2. The PT must be installed in a control panel.
3. The mounting panel must be between 1.6 and 4.8 mm thick. Tighten the Mounting
Brackets evenly to a torque of between 0.1 and 0.25 N·m for the NV3W/NV3Q and be-
tween 0.2 and 0.3 N·m for the NV4W to maintain water and dust resistance. Make sure
the panel is not dirty or warped and that it is strong enough to hold the Units.
4. Do not let metal particles enter the Units when preparing the panel.
5. Do not connect an AC power supply to the DC power terminals.
6. Do not perform a dielectric voltage test.
7. Use a DC power supply that will provide a stable output even if the input is momentarily
interrupted for 10 ms, and which has reinforced or double insulation.
8. Use a twisted-pair cable to connect to the power terminals. Tighten the terminal screws
to a torque of between 0.22 and 0.30 N·m. Make sure the screws are properly tight-
ened.
9. To prevent malfunctions caused by noise, ground the PT correctly.
10. Do not touch the surface of the circuit boards or the components mounted on them with
your bare hands. Discharge any static electricity from your body before handling the
boards.
11. Turn OFF the power supply before connecting or disconnecting cables.
12. The maximum tensile load for cables is 30 N. Do not apply loads greater than this.
13. Confirm the safety of the system before turning ON or OFF the power supply.
14. Cycle the power supply after changing the DIP switch settings.
15. Do not perform the following operations while the SD memory card is being accessed
(NV4W/NV3Q only):
• Turning OFF the power supply to the PT
• Removing the memory card
Always follow the specified procedure when removing the memory card.
16. Start actual system application only after sufficiently checking screen data and the op-
eration of the program in the PLC (host).
17. Do not press the touch switch with a force greater than 30 N.
18. Do not use a screwdriver or any other tool to press a touch switch.
19. Confirm the safety of the system before pressing any touch switch.
20. Do not accidentally press touch switches when the backlight is not lit or when the dis-
play does not appear. Confirm the safety of the system before pressing touch switches.
21. Before initializing screen data, confirm that existing data is backed up at the NV-Design-
er.
22. When changing the password with the system menu, do not reset or turn OFF the pow-
er supply until writing is finished.
Model Rated power supply voltage Capacity
NV3W-M@20L 5 VDC (allowable range: 4.5 to 5.5 VDC) 1 W min.
NV4W-M@@@ 24 VDC (allowable range: 21.6 to 26.4 VDC) 1.7 W min.
NV3W-M@@@ 2 W min.
NV3Q-MR@@ 2.4 W min.
NV3Q-SW@@ 3.6 W min.
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