Omron E5CS-U, User Manual

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viii
Installation Precautions
Service Life
Use the Temperature Controller within the following temperature and humidity ranges:
Temperature:
−
10 to 55
°
C (with no icing or condensation), Humidity: 25% to 85%
If the Controller is installed inside a control board, the ambient temperature must be kept to under
55
°
C, including the temperature around the Controller.
The service life of electronic devices like Temperature Controllers is determined not only by the
number of times the relay is switched but also by the service life of internal electronic components.
Component service life is affected by the ambient temperature: the higher the temperature, the shorter
the service life and, the lower the temperature, the longer the service life. Therefore, the service life
can be extended by lowering the internal temperature of the Temperature Controller.
When two or more Temperature Controllers are mounted horizontally close to each other or vertically
next to one another, the internal temperature will increase due to heat radiated by the Temperature
Controllers and the service life will decrease. In such a case, use forced cooling by fans or other
means of air ventilation to cool down the Temperature Controllers. When providing forced cooling,
however, be careful not to cool down the terminals sections alone to avoid measurement errors.
Ambient Noise
To avoid inductive noise, keep the wiring for the Digital Temperature Controller's terminal block wiring
away from power cables carrying high voltages or large currents. Also, do not wire power lines
together with or parallel to Digital Temperature Controller wiring. Using shielded cables and using
separate conduits or ducts is recommended.
Attach a surge suppressor or noise filter to peripheral devices that generate noise (in particular, motors,
transformers, solenoids, magnetic coils or other equipment that have an inductance component).
When a noise filter is used at the power supply, first check the voltage or current, and attach the noise
filter as close as possible to the Temperature Controller.
Allow as much space as possible between the Digital Temperature Controller and devices that
generate powerful high frequencies (high-frequency welders, high-frequency sewing machines, etc.)
or surge.
Measurement Accuracy
When extending or connecting the thermocouple lead wire, be sure to use compensating wires that
match the thermocouple type. Do not extend the lead wire of the platinum resistance thermometer. If
the lead wire of the platinum resistance thermometer must be extended, be sure to use wires that
have low resistance and keep the resistance of the three lead wires the same.
Mount the Temperature Controller so that it is horizontally level.
If the measurement accuracy is low, check whether the input shift has been set correctly.
Waterproofing
The degree of protection is as shown below. Sections without any specification on their degree of
protection or those with IP @ 0 are not waterproof.
E5CSV: Front panel IP66, rear case IP20, terminals IP00
E5CS-U: Front panel IP50, enclosure rating 2 (IEC 60529),
rear case IP20, terminals IP00