Berthold Duo Xpert LB 478 MPLM, Operating Manual

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5 Electric Installation LB 478 MPLM
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56925-8BA2 Rev.00, 07/2019
Circuit Breaker
A circuit breaker according to DIN EN 61010-1
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must be available,
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must be easily accessible for the maintenance personnel and
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is to be included in the company-internal documentation.
The master EVUs / extension modules are not equipped with a separate ON/OFF
switch to connect or disconnect the voltage supply. Make sure that the system can
be de-energised via the external power supply.
The circuit breaker can be installed as an automatic fuse or switch and has to com-
ply with the requirements according to IEC 947-1 and IEC 947-3. If a fuse is applied,
it must not be triggered under a current strength of 4 A per device.
IMPORTANT
The circuit breaker must be located near the device and be properly marked as
belonging to it.
Cables and Lines
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Lines are to be connected with special care.
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Connection lines and routing must comply with the applicable regulations.
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When routing the cables, make sure that the cable insulation cannot be me-
chanically damaged by sharp edges or movable metal parts.
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Use the approved Berthold cable or a cable with equivalent specifications for
the connection.
For intrinsically safe systems, the detector must be connected to the equipotential
bonding of the system. The detector is connected via a 2-core (0.2 ... 2.5 mm²) cable
with approx. 5 ... 10 mm diameter. A screened cable can be used in systems with
extremely strong electrical noise. The screen may only be laid out on one side of
the detector. The maximum cable length depends on the cable resistance, which
may not exceed a total (there and back) of 40 ohms. For standard cables from
Berthold (Id. no. 32024), this results in a cable length of 1000m, from the evaluation
unit to the detector. For intrinsically safe systems, the maximum permissible induct-
ance and capacitance of the cable should be considered to the max. 40 ohm.
When routing the connection lines, make sure that
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no dirt or moisture reaches the connection room,
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the conductors are not damaged when the cable insulation is removed,
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the conductor insulation or the sleeve of the wire end ferrules reach into the
housing of the terminal unit,
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blank, conductive segments of the lines (e.g. wires of a litz wire) do not reach
outside the terminal unit,
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the wire end ferrule or the stripped wire have a length of 8 mm so that the
wire is held securely in the clamp,
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the line insulation reaches into the sleeve of the wire end ferrule if these com-
ponents are used,
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the admissible minimum bending radius for the respective line cross-section is
not exceeded and