3-2
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Precautions to be taken in installation and wiring
Handling Precautions
The following section describes precaution to be taken when the EST is
mounted in an operation panel. Observe the instructions listed below to
ensure optimum resistance to environmental conditions and guarantee
ease of use and maintenance.
•
Provide sufficient free space around the EST to ensure good ventilation.
•
Do not mount the EST directly above transformers or high capacity
resistors that dissipate large amounts of heat.
•
Do not install the EST together with high voltage devices or motors.
Preferably, install the EST in a different panel.
•
Make sure the EST is properly grounded to improve noise resistance.
Use a grounding cable with a diameter of at least 2mm
2
. When a long
grounding cable is required, use a thick insulated cable and route it
through a conduit.
•
Do not bundle the EST communications cables or data lines with a noise
source such as the power cable of a motor. If routing theses cables in the
same duct cannot be avoided, use a shielded cable and connect the
shield to the ground.
•
Mount the EST on a flat, even surface as performance may otherwise not
meet the IP65 standard.
•
Packings are subject to aging and all packings that have lost their
elasticity through long use should be replaced with new ones.
•
Note that if the screws of the mounting bracket are over tightened, the
panel protective sheet on the display surface may crease. Should this
happen, loosen the screws.
•
Install the EST in a vertical attitude to ensure natural convection.
Horizontal and oblique installation will affect operating temperature range
and should be avoided.
Consult Yamatake for technical advice when normal installation is not
possible.
Chapter 3. INSTALLATION AND WIRING
WARNING
Be sure to turn off the power when you wire, assemble or disassemble the
EST. Otherwise, electric shock hazard can be caused.
EST body
Panel
