Omron E5AN User Manual page 14

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.
When extending or connecting the lead wire of the platinum resistance thermometer, 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 to see if input shift has been set correctly.
● Waterproofing
The degree of protection is as shown below. Sections without any specification on their degree of pro-
tection or those with IP@0 are not waterproof.
Front panel: IP66
Rear case: IP20, Terminal section: IP00
(E5CN-U: Front panel: IP50, rear case: IP20, terminals: IP00)
xiv