4 Installation and connection information
4.1 General information
Note:
When used in protection class "Ex nA" (non-sparking), a transient protective device must
be set to a level that does not exceed 140% of the peak voltage of 85 V.
When used in environments with flammable dust, electrostatic discharge from the
plastic label must be avoided.
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The safety instructions in Chapter
must be followed!
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Only use the metal EX EMC cable glands provided by the manufacturer.
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Install the junction box so that the cable glands are on the bottom.
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Do not open the junction box when connected to the voltage supply.
Note:
At ambient temperatures >45°C, cables that are suitable for at least 85°C must be used.
4.2 Connecting intrinsically safe circuits
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The housing grounding or equalization line must be connected to the outside of the
housing under the ground screw.
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The junction box is suitable for use in potentially explosive atmospheres for
connection to intrinsically safe circuits. The circuits consist of
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the connection load cells (passive)
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the connection cable to an interface with an (active) intrinsically safe circuit, e.g.,
PR 1626/6x in connection with a downstream device.
The intrinsically safe circuit consists of the circuits for the supply, sense, and
measuring voltage.
-
It is not permissible to connect multiple active intrinsically safe circuits in the junction
box.
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When used in zone 20, the accumulated dust must not exceed a thickness of 5 mm.
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When used in zone 2, ensure that no voltage peaks more than 40% above the
nominal voltage can occur.
Weighbridge Cable Junction Box PR 6021/68S
4 Installation and connection information
EN-12
Minebea Intec
Summary of Contents for Weighbridge PR 6021/68S
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