Operating And Storage Locations; Mounting Method; Ssr Mounting Pitch (Panel Mounting); Ventilation Outside The Control Panel - Omron G3NA Manual

Operating and Storage Locations

Do not use or store the G3NA in the following locations. Doing so
may result in damage, malfunction, or deterioration of performance
characteristics.
• Do not use or store in locations subject to direct sunlight.
• Do not use in locations subject to ambient temperatures outside
the range –20 to 60 ° C.
• Do not use in locations subject to relative humidity outside the
range 45% to 85% or locations subject to condensation as the
result of severe changes in temperature.
• Do not store in locations subject to ambient temperatures outside
the range –30 to 70 ° C.
• Do not use or store in locations subject to corrosive or flammable
gases.
• Do not use or store in locations subject to dust (especially iron
dust) or salts.
• Do not use or store in locations subject to shock or vibration.
• Do not use or store in locations subject to exposure to water, oil, or
chemicals.
• Do not use or store in locations subject to high temperatures or
high humidity.
• Do not use or store in locations subject to salt damage.
• Do not use or store in locations subject to rain or water drops.
■ Precautions for Correct Use
Please observe the following precautions to prevent failure to
operate, malfunction, or undesirable effect on product performance.
Before Actual Operation
1. The G3NA in operation may cause an unexpected accident.
Therefore it is necessary to test the G3NA under the variety of
conditions that are possible. As for the characteristics of the
G3NA, it is necessary to consider differences in characteristics
between individual SSRs.
2. Unless otherwise specified, the ratings in this catalog are tested
values in a temperature range between 15 ° C and 30 ° C, a relative
humidity range between 25% and 85%, and an atmospheric
pressure range between 88 and 106 kPa (standard test
conditions according to JIS C5442). It will be necessary to
provide the above conditions as well as the load conditions if the
user wants to confirm the ratings of specific G3NAs.

Mounting Method

SSR Mounting Pitch (Panel Mounting)

Duct
80 mm min.
12
Solid State Relays
60 mm min.
Vertical direction
30 mm min.
G3NA
Relationship between SSRs and Duct Height
Incorrect Example Countermeasure 1
Duct
Vertical
direction
Duct
Do not surround the SSR Use short ducts.
with ducts, otherwise the
heat radiation of the SSR
will be adversely affected.

Ventilation Outside the Control Panel

Be aware of airflow
Duct
Air inlet
If the air inlet or air outlet has a filter, clean the filter regularly to
prevent it from clogging to ensure an efficient flow of air.
Do not locate any objects around the air inlet or air outlet, otherwise
the objects may obstruct the proper ventilation of the control panel.
A heat exchanger, if used, should be located in front of the SSRs to
ensure the efficiency of the heat exchanger.
• Please reduce the ambient temperature of SSRs.
The rated load current of an SSR is measured at an ambient
temperature of 40 ° C.
• An SSR uses a semiconductor in the output element. This causes
the temperature inside the control panel to increase due to heating
resulting from the passage of electrical current through the load. To
restrict heating, attach a fan to the ventilation outlet or air inlet of
the control panel to ventilate the panel. This will reduce the ambient
temperature of the SSRs and thus increase reliability. (Generally,
each 10 ° C reduction in temperature will double the expected life.)
Load current (A) 5 A 10 A 20 A 40 A 50 A 75 A 90 A
Required number 0.08 0.16
of fans per SSR
Example: For 10 SSRs with load currents of 10 A,
0.16 × 10 = 1.6
Thus, 2 fans would be required.
2
Size of fans: 92 mm , Air volume: 0.7 m
Ambient temperature of control panel: 30 ° C
If there are other instruments that generate heat in the control panel
other than SSRs, additional ventilation will be required.
Countermeasure 2
50 mm max.
(A height of no
Duct
more than half
the SSR's height
is recommended.)
Airflow
Base
Duct Duct
If the ducts cannot be
shortened, place the SSR on
a metal base so that it is not
surrounded by the ducts.
Ventilation
outlet
(axial fan)
0.31 0.62 0.8 1.2 1.44
3
/min,