IAI America PCON-ABU - Manual (Page 31)

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3. Installation and Noise Elimination
Pay due attention to the environment in which the controller is installed.
3.1 Installation Environment
The controller can be used in a pollution degree 2 *1 or equivalent environment.
*1 Pollution degree 2: Normally, only non-conductive pollution occurs. However, a temporarily electricity
conductive pollution caused by condensation may be expected (EN60947-5-1).
(1) When installing and wiring the controller, do not block the cooling vent holes. (If sufficient ventilation is
not provided, not only the controller is unable to demonstrate its designed performance, but it may
also cause unexpected breakdown.)
(2) Prevent foreign objects from entering the controller through vent holes. The controller is not
constructed dustproof or waterproof (oilproof). Accordingly, avoid using the controller in a dusty place
or place subject to oil mist or cutting fluid.
(3) Do not expose the controller to direct sunlight or irradiated heat from heat treatment ovens or other
large heat sources.
(4) Use the controller in an environment of 0 to 40
qC in surrounding air temperature and 85% or below
(non-condensing) in humidity, free from corrosive or natural gases.
(5) Use the controller in an environment where it will not be subject to external vibration or shock.
(6) Prevent entry of electrical noise into the controller or its cables.
3.2 Supplied Power
The supplied power is 24 VDC
r 10%.
(Maximum power-supply current: 300 mA)
3.3 Noise Elimination and Grounding
This section explains how to eliminate noise in the controller during use.
(1) Wiring and power supply
[1] Provide dedicated class D grounding. The grounding wire should have a wire size of 1.6 mm
2
or
larger.
Simple
absolute unit
Other
equipment
Connect to ground
using a cable of the
largest size over the
minimum distance.
Metal
enclosure
Class D grounding
(Formerly class 3 grounding: Grounding
resistance of 100
: or less)
Simple absolute
unit
Other
equipment
Connect the grounding wire to
one controller at a time without
sharing it with or connecting via
other devices.