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Installation Precautions Section 2-3
2-3 Installation Precautions
2-3-1 Ensuring Prolonged Use
Use the Temperature Controller in the following operating environment:
Temperature:
−10 to +55°C (with no icing or condensation)
Humidity: 25% to 85%
When the Temperature Controller is incorporated in a control panel, make
sure that the Controller's ambient temperature (not the panel's ambient tem-
perature) does not exceed 55
°C.
The life of electronic equipment like Temperature Controllers is influenced not
only by the life determined by the relay switching count but also by the life of
internal electronic components. The service life of components is dependent
on the ambient temperature: The higher the ambient temperature becomes,
the shorter the service life becomes, and vice versa. For this reason, the ser-
vice life of the Temperature Controller can be extended by lowering its internal
temperature.
Mounting Temperature Controllers in any way other than the specified mount-
ing method may cause heat to build up inside the Temperature Controllers,
which will shorten their service life.
If there is a possibility of the ambient tem-
perature rising to a temperature above the specified temperature range, take
steps, such as installing fans, to cool the E5ZN.
Be sure that the cooling method in not cooling just the terminal block. If only
the terminal block is cooled, measurement errors may occur.
2-3-2 Reducing the Influence of Noise
To reduce inductive noise, the leads on the Temperature Controller's terminal
block must be wired separately from high-voltage/high-current power lines.
Also, avoid wiring lines in parallel with or in the same wiring path as power
lines. Other methods, such as separating conduits and wiring ducts or using
shielded cables, are also effective.
Attach a surge absorber or noise filter to peripheral equipment that generates
noise (in particular, motors, transformers, solenoids, or other equipment that
has a magnetic coil or other inductance component).
When a noise filter is used at the power supply, first check the voltage or cur-
rent, and attach the noise filter as close as possible to the Temperature Con-
troller.
Also, install the Temperature Controller as far away as possible from equip-
ment that generates strong, high frequencies (e.g., high-frequency welders or
high-frequency sewing machines) or surges.
2-3-3 Ensuring Precise Measurements
When the thermocouple leads are extended, be sure to use a compensating
lead wire matched to the type of thermocouple.
When the platinum resistance detector leads are extended, use a lead having
the smallest resistance to equalize the resistance of the three leads.
Mount to DIN track that has been installed vertical to the ground.
If there is a large error in the measurement values, make sure that input com-
pensation has been set correctly.
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