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2.
Caution
2.1 Cautions on installation
Avoid the following places for installation.
•
a place where the ambient temperature may reach beyond the range of from 0 to 50°C while in
operation.
•
a place where the ambient humidity may reach beyond the range of from 45 to 85% RH while in
operation.
•
a place where a change in the ambient temperature is so rapid as to cause condensation.
•
a place where corrosive gases (sulfide gas and ammonia gas, in particular) or combustible gases are
emitted.
•
a place where the unit is subject directly to vibration or shock.
(Vibration or shock may cause output relay malfunction.)
•
a place exposed to water, oil, chemicals, steam and vapor.
(if immersed with water, take the inspection by sales office to avoid an electrical leakage and firing)
•
a place where the unit is exposed to dust, salt air, or air containing iron particles.
•
a place where the unit is subject to intereference with static electricity, magnetism, and noise.
•
a place where the unit is exposed to direct sunlight.
•
a place where the heat may be accumulated due to the radiation of heat.
2.2 Caution on installation on panel
•
Insert the mounting bracket (accessory) from the rear side until the main unit is securely fit into the
panel. If there should be a play, tighten two screws lightly until the play is eliminated. (Do not tighten
the screws excessively be cause the mounting bracket can be removed from the stopper by the force.)
•
The front side of this controller conforms to NEMA 4X(equivalent with IP66). To ensure the water-
proofness between the instrument and the panel, use packings that are provided as accessories in
the following manner: (The improper fitting of packings will ruin the waterproofness.)
q As shown in Figure 1, fit a packing to the case of the unit and then insert it in the panel.
wTighten screws on the fixing frame or fixtures so that no gaps are given between the front of control-
ler and packing and between panels. Check that there are no deviation and deformation of packing as
shown in Fig.3.
•
If panel strength is weak, it may causes a gap between the packing and the panel, thus impairing
water resistance.
Packing
Unit
Front
Case
Figure 1
Packing
Unit
Mounting
Panel
Panel
bracket
Figure 2
– 6 –
Packing
Case
Screw
(Bad)
Figure 3
Packing
Case
(Good)
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