2
Particular note should be taken to the position of variable speed drives and switching power supplies.
Their input and load cables should be screened to a central star earth point.
2.1.2 Making a NEMA-4 Mounting
Panel
Details
The unit can be mounted into panels with a depth of 4”(105mm). It is recommended that
the unit be mounted on the front panel of a steel enclosure, through an appropriate opening*.
Allow a clearance of 1”(25mm) around the sides of the unit for mounting hardware. Allow
clearance for cable connections to the back of the unit. Unit depth may vary according to
cable type used. Typically, plan a depth to accommodate at least 4”(105mm) behind the
panel.
NEMA-4
Mounting
Put the unit through the panel cut out. Slide the clamps into the 6~8 holes provided around
the case. Tighten the clamping screws in an even pattern until the unit is secured in the
panel.
Caution!
Do not over tighten mounting clamps!
Note:
Specifications
Note: To seal to NEMA-4 specifications, all supplied mounting clamps must be used and
panel cannot flex more than 0.010”.
2.1.3 Environmental Considerations
The NP-700p are to be used indoors as built in displays. Make sure that the displays are
installed correctly and that the operating limits are followed (See Specifications).
Do not operate the unit in areas subject to explosion hazards due to flammable gases,
vapors or dusts.
The unit should not be installed where fast temperature variations and/or high humidity
are present. This will cause condensation of water in the device.
Do not install these terminals in environments where have inflammable gases.
2.2 Power Connections
Make sure that all local and national electrical standards are met when the installing the unit. Contact
your local authorities to determine which codes apply.
2.2.1 Power Requirements
Power
The NP-700p can be powered by DC power only. The specified voltage
range is
24±20%
Volts DC. This insures compatibility with most controller
DC systems.
The power conditioning circuitry inside the unit is accomplished by a
switching power supply. The peak starting current can be as high as 700mA.
Fusing
Requirements
If the display does not come on within 2 seconds of power up, remove
power. An internal fuse will prevent damage if the polarity of the DC power
is incorrect. Check wiring to insure proper connections and try to power up
again.
Caution
High Voltage
An Internal fuse will prevent damage for over voltage condition however it
isn’t guaranteed.
DC voltage sources should provide proper isolation from main AC power
and similar hazards.
Caution
Emergency
Stop
A Hard-wired EMERGENCY STOP should be fitted in any system using an
NP-700p to comply with ICS Safety Recommendations.
