Omron E5ZD, Руководство по эксплуатации

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5
and high-voltage or high-current lines as large as possible. If necessary, use
shielded cables to avoid interference.
•
Separate the E5ZD Unit and all I/O wiring to it as far as possible from any de-
vices generating strong high-frequency waves (e.g., high-frequency welders)
or those that generate surges.
•
If the E5ZD is located close to devices generating noise, attach surge suppres-
sors or noise filters to the noise-generating devices. Be particularly careful of
motors, transformers, solenoids, magnetic coils, and other inductive devices.
When installing noise filters, verify voltage and current capacities beforehand,
and install the filters as close as possible to the E5ZD.
•
To reduce noise emitted from the E5ZD and to protect it from external noise, be
sure to ground the rack or case and ground the frame ground terminal of the
external power source.
•
Although the E5ZD can be installed at any angle without inhibiting operation,
the installation angle will affect heat dissipation from the terminal board, and
may cause variations in temperature measurements. To minimize these ef-
fects, the E5ZD should be installed horizontally, installed vertically with the ter-
minal board up and the communications connectors down, or installed with a
fan blowing on the terminal board to provide even temperatures to all termi-
nals.
The E5ZD-8H
jj
M-E should either be installed horizontally or else vertically
with the sensor connectors down.
•
With thermocouple models, use a compensating lead suitable for the thermo-
couple.
•
Operate and store the E5ZD in an environment free from icing, condensation,
dust, dirt, corrosive gases (particularly sulfuric or ammonia gas), excessive vi-
bration, excessive shock, water, grease, and oil. Do not operate or store the
E5ZD where subject to extreme temperature changes or dissipating heat (e.g.,
from a furnace).
•
Never place so much weight on the E5ZD that it will deform or otherwise
change, whether in storage or operation.
•
The operating environment for the E5ZD should have temperatures between
–10
°
and 55
°
C, between 35% and 85% humidity, and no condensation or icing.
•
The storage environment for the E5ZD should have temperatures between
–25
°
and 65
°
C, 35% and 85% humidity, and no condensation or icing.
•
The E5ZD may affect radio, television, and other wireless reception if installed
nearby.
1-4-3 Operating Precautions
Caution Never touch the E5ZD while the power is turned on or when a ground-type ther-
mocouple is connected, as there is danger of electric shock.
•
The E5ZD requires a 24-VDC power supply. Do not reverse the polarity of the
power terminals, and confirm that the voltage at the connector on the E5ZD is
within power supply ratings (21.6 to 26.4 V). Also be sure that the power supply
and wiring have sufficient capacity for the E5ZD. Insufficient capacity will pre-
vent operation of the E5ZD; allow at least twice the rated power supply current.
•
Power supply from a half-wave rectifier cannot be used. Use a stabilized power
supply.
•
Initial settings on the E5ZD’s DIP switches must be made before applying pow-
er.
•
The nonvolatile memory has a limited overwrite life (approximately 10,000
times). Be sure that you have not exceeded this life; doing so will mean that
new settings are not saved.
Precautions
Section 1-4