Berthold Duo Xpert, Руководство по эксплуатации

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LB 470 Level
5 Electric Installation
56925BA2 Rev. 03, 11/2017
39
General important points for installation

Connect the earth conductor.

Ground the housing.

Please observe the information signs on the devices.
5.1.1
80B
Circuit Breaker
A circuit breaker according to DIN EN 61010-1
•
must be available,
•
must be easily accessible for the maintenance personnel and
•
is to be included in the company-internal documentation.
The master EVUs / slave 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.
5.1.2
81B
Cables and Lines

Lines are to be connected with special care.

Connection lines and routing must comply with the applicable regulations.

When routing the cables, make sure that the cable insulation cannot be me-
chanically damaged by sharp edges or movable metal parts.

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 (2 x 12) cable with
approx. 5 ... 10 mm diameter. A screened cable can be used in systems with ex-
tremely 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 TECHNOLOGIES (Id. no. 32024), this results in a cable length of 1000m,
from the evaluation unit to the detector. For intrinsically safe systems, the maxi-
mum permissible inductance and capacitance of the cable should be considered to
the max. 40 ohm.