Omron NT-series Programmable Terminal V022-E3-1 - Manual (Page 11)



Safety Precautions (continued)
WARNING:
 Do not attempt to take the NT600S apart and do not touch any internal parts
while the power is being supplied. Doing either of these may result in electri-
cal shock.

Switch off the power before replacing the backlight, or you could sustain an
electric shock.
Caution:

Select a proper location referring to Appendix D Installation Environment
(page 262).
Always switch OFF the power before assembling equipment or connecting
cables. Otherwise you could sustain an electric shock or equipment could be
damaged.

Fit crimp-style terminals to the power cable. Connecting the wires of the
cable to the terminal block directly after merely twisting them together could
cause fire and other hazards.

The combined lengths of each of the I/O connecting cables must not exceed
a total of 12 m (or 6 m for C


H models).

Do not use input functions such as PT touch switches for applications where
danger to human life or serious damage is possible, or for emergency switch
applications.

On unpacking the NT600S, check its external appearance and confirm that
there is no damage. Also confirm that there is no abnormal noise on shaking
the unit lightly. The product may malfunction if it is damaged.
 If the DIP switch settings have been changed when the NT600S is powered,
reset the power to the NT600S. The changes with the DIP switches become
effective only after the power supply is reset.

In order to ensure system safety, be sure to periodically read the PT operat-
ing status bit at the host during operation to confirm that the PT is always
operating correctly.

During work at the panel, take care to ensure that no metal scraps enter the
unit. Otherwise, the product may malfunction.

For the connection to the power supply terminal block, twisted wires of 2
mm
2 or greater cross sectional area and M 3.5 size crimp terminals must be
used. Use crimp terminals to connect the power supply to the power input
terminals. Recommended crimp terminals for M3.5 are given below. Tighten
the screws on the terminal block to a torque of 0.8 N·m. Otherwise fire may
occur.
 After connecting a communication cable, always secure it with the screws, or
the cable may disconnect, causing operation to fail.