21
Precautions for Correct Use
NX-series Communications Interface Units User’s Manual (W540)
Precautions for Correct Use
• Follow the instructions in this manual to correctly perform installation and wiring.
• Do not operate or store the Units in the following locations. Doing so ma
y result in malfunction, in
operation stopping, or in burning.
Locations subject to direct sunlight
Locations subject to temperatures or humidity outside the
range specified in the specifications
Locations subject to condensation as the result
of severe changes in temperature
Locations subject to corrosive or flammable gases
Locations subject to dust (especially iron dust) or salts
Locations subject to exposure to water, oil, or chemicals
Locations subject to shock or vibration
• Take appropriate and sufficient countermeasures during installation in the following
l
ocations.
Locations subject to strong, high-frequency noise
Locations subject to static electricity or other forms of noise
Locations subject to strong electromagnetic fields
Locations subject to possible exposure to radioactivity
Locations close to power lines
• Before touching a Unit, be sure to first touch
a
grounded metallic object in order to discharge any
static build-up.
• Use the rated power supply voltage for the Units that supp
ly power. Take appropriate measures to
ensure that the specified power with the rated voltage and frequency is supplied in places where the
power supply is unstable.
• Install the Units away from sources of heat and ensure proper ventilation. Not doing so may result in
malfunction
, in operation stopping, or in burning.
• Do not allow foreign matter to enter the openings in the U
nit. Doing so may result in Unit burning,
electric shock, or failure.
• Always mount an End Cover to the end of the EtherCAT Sla
ve Terminal to protect the last NX Unit in
the EtherCAT Slave Terminal. Not attaching the End Cover may result in malfunction or failure of the
EtherCAT Slave Terminal.
• After you mount the Slave Terminal, always install an End Plate on each side of the Slave Terminal
to
secure the Slave Terminal. If you do not secure it, the Slave Terminal may be damaged or mal-
function.
• Check the connector orientation and the socket and plug shapes before you connect the D-Sub con-
nector. If the connector is not connected correc
tly,
malfunctions may occur.
• If you use the RS-422A/485 port, check the polarity befo
re you connect the cable. The polarity of the
SDA/SDB and RDA/RDB terminals and signals are reversed for some remote devices. If the polarity
is not correct, malfunctions may occur.
• If you use the RS-422A/485 port, use either two-wire
or four-wire connections. Do not use both of
them at the same time. If you use two-wire and four-wire connections at the same time, malfunctions
may occur.
• If you use the RS-422A/485 port, ground the shield only at the CIF Unit.
Do not ground it at the other
end of the cable. If you ground both ends of the cable, a difference in electrical potential between the
two grounds may damage the equipment.
Storage, Mounting, and Wiring
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