LB 470 Level 5 Electric Installation
56925BA2 Rev. 03, 11/2017
General important points for installation
Connect the earth conductor.
Ground the housing.
Please observe the information signs on the devices.
5.1.1 80BCircuit 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.
The circuit breaker must be located near the device and be properly marked as
belonging to it.
5.1.2 81BCables 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.
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