Omron Programmable Terminals NT631, Operation Manuals

Page: 48 / 692

39
Installation
Section 3-1
(2) Attach the panel fittings at the following positions shown below, from the rear
of the NT631/NT631C.
Fit the hook of the fitting in the square hole in the body and tighten the screw
with the Philips head screwdriver while lightly pulling the fitting.
Fittings at the two (
:
) positions are not necessary if you do not need it dust
proof and waterproof.
PRINTER PORT B PORT A
(
:
)
(
:
)
Notice - During work at the panel, take care to ensure that no metal scraps enter the unit.
- The thickness of applicable operation panel is 1.6 mm to 4.8 mm. All fittings
must be tightened uniformly to a torque of 0.5 to 0.6 N
⋅
m in order to ensure wa-
ter- and dust-resistance. Front sheet of NT631/NT631C may be warped if the
tightening is too strong or not uniformity. The panel must not be soiled or
warped, and must be able to support an installation that will remain secure and
strong.
3-1-3 Power Supply Connection
Connect a 24 VDC power supply to the power input terminals.
Notice - Depending on how the power is switched ON/OFF, the entire system may stop.
Follow the correct procedure when switching the power ON/OFF.
- Carefully check the wiring before switching ON the power.
- Do not connect AC power to the DC terminals.
- Use DC power supplies with low voltage fluctuation.
- Do not perform a dielectric strength test.
- If complying with EC directives (low voltage directives), the following points must
be noted (compliance with EC directives):
1.Use a power supply with reinforced insulation.
2.When installing NT631-ST211(B)
-EV1
on the ultimate system, the rear of the
NT631 must be placed within an enclosure to restrict the operators’ use only to
the front panel.
- When using NT631-ST211(B)
-EV1
, warm-up time of the power supply must be
200 ms or less. If longer than this, NT631 may not boot up.
24 VDC
24 VDC
power supply
Breaker