gefran 2850T, Use And Installation Manual

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2. INSTALLATION
80703B_MHW_2850T/3850T_02-2019_ENG
2.2. Installing I/O modules and Gefran communication
2.2.1. General installation rules
The I/O module groups are designed for permanent indoor
installations. They must be installed in control panels that
are able to protect the connectors on the modules.
Warning! The modules must NOT be installed in
dangerous environments (flammable or explosive).
They can be connected to elements that operate
in such environments only by means of suitable
types of interfaces in conformity with the applica-
ble safety standards.
Sudden changes in temperature, freezing or condensation
or corrosive gases should not occur where modules are
installed.
Modules can operate in environments with pollution degree
2 (presence of non-conductive dust, only temporarily
conductive due to potential condensation). Prevent mod-
ules from being reached by metallic processing particles or
scraps as well as any condensation products.
2.2.2. Vibration
The modules can withstand vibrations from 10 to 150 Hz,
20 m/s
2 (2 g), in all directions (X, Y and Z).
If the modules are mounted on a support that exceeds
these limits, a vibration suspension and damping system
should be provided.
2.2.3. Minimum clearances for ventilation
The temperature of the compartment that contains the
modules should not exceed, in any case, the 55° C (131 °F).
Never block the air vents.
Tip.
The lower the temperature in which the mod-
ules operate, the higher the life expectancy of their
electronic components.
Warning! Forced module cooling (i.e. with a fan)
can cause measurement errors.
2.2.4. Positioning
The modules can only be mounted horizontally.
When positioning the modules, make sure that there is
sufficient air circulation around them. Figure 9 shows the
minimum distances from adjacent walls that must be re-
spected for ventilation.
Figure 9 - Horizontal positioning
2.2.5. Module installation
The modules must be mounted on metallic and grounded
DIN 35 mm (1,38”) rail inside switchboards.
To secure the modules:
1. insert the top of the module hook on the DIN rail;
2. rotate the module to the vertical position, pressing until
you hear the "clack" which indicates that the lower
slide hook is attached to the DIN rail.
Warning! There is a spring contact at the back
of each module to ground it through the DIN rail.
There will be no electric continuity with the ground
if the rail is not conductive or is not connected.
Figure 10 - DIN rail mounting
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Min 3 cm
(1.18")
Min 3 cm
(1.18")
Min 10 cm (3.94")
Min 10 cm (3.94")
Shield bar
Raceway
Raceway
Shield bar