Graphic Operator Terminal /
INSTALLATION TIPS
Install the fan so that it sits in the cooler area and blows cold air against the graphic operator
terminal. If the fan is mounted at the top and sucks air upwards, the fan’s ambient temperature is
higher resulting in a shorter lifespan.
A good fan with a ball-bearing mounting has an expected lifespan of at least 40,000 hours (not a
guaranteed lifespan) at 40 °C. This corresponds to at least 4 years of continuous use. If a
thermostat is installed, the fan only needs to come on when needed.
Large graphic terminals draw only one fifth of the current when the background lighting is off. The
loss effect drops from e.g. 25 W to only 5 W. The graphic operator terminal’s loss effect = supply
voltage x current. Virtually no power goes to external users and no loss effects due to inputs.
6.5 Safety
Most of the graphic operator terminals are powered with 24 V DC.
If you use a power supply that meets safety standards and only supplies the graphic operator
terminal, no problems should occur. However, use caution if you have a 24 V unit that also
supplies other units.
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