Omron E5CN User Manual page 11

14) Do not use paint thinner or similar chemical to clean with. Use standard grade alcohol.
15) Design system (control panel, etc.) considering the 2 second of delay that the controller's output to be set
after power ON.
16) The output may turn OFF when shifting to certain levels. Take this into consideration when performing
control.
17) The number of EEPROM write operations is limited. Therefore, use RAM write mode when frequently
overwriting data during communications or other operations.
18) Always touch a grounded piece of metal before touching the Digital Temperature Controller to discharge
static electricity from your body.
19) Do not remove the terminal block. Doing so may result in failure or malfunction.
20) Control outputs that are voltage outputs are not isolated from the internal circuits. When using a grounded
thermocouple, do not connect any of the control output terminals to ground. (Doing so may result in an
unwanted circuit path, causing error in the measured temperature.)
21) When replacing the body of the Digital Temperature Controller, check the condition of the terminals. If
corroded terminals are used, contact failure in the terminals may cause the temperature inside the Digital
Temperature Controller to increase, possibly resulting in fire. If the terminals are corroded, replace the
case as well.
22) Use suitable tools when taking the Digital Temperature Controller apart for disposal. Sharp parts inside
the Digital Temperature Controller may cause injury.
● 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 num-
ber of times the relay is switched but also by the service life of internal electronic components. Compo-
nent 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 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 con-
duits 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 compo-
nent). 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 gener-
ate powerful high frequencies (high-frequency welders, high-frequency sewing machines, etc.) or
surge.
● Ensuring Measurement Accuracy
When extending or connecting the thermocouple lead wire, be sure to use compensating wires that
match the thermocouple types.
xii