.52+1(
BM 70 A Kurzanleitung
Seite: 8
4. Entwurf 03/97
Class of protection
The BM 70 A level gauge is designed for safety class 1 in conformity with VDE
0106 Part 1.
24 V DCAC supply
When connected to a “functional extra-low voltage with safety separation“
power source (SELV or PELV) in accordance with VDE 0100, Part 410 or equivalent
(inter)national regulations, connection of a safety conductor (PE) is not required.
115/230 V AC supply
Connection to a power source with dangerous contact voltage: if due to protective
measures in conformity with VDE 0100 a safety conductor PE is stipulated, it must
be connected to the separate U-clamp terminal in the terminal compartment of the
signal converter.
Equipotential bonding
When used in hazardous areas, the BM 70-Ex A must be incorporated in the PA
equipotential bonding system , irrespective of the type of power supply! If the PA
is connected via a separate conductor, this must be connected to the separate U-
clamp terminal at the “neck“ of the BM 70-Ex A. Cancellation of equipotential
bonding is only permitted when the BM 70 A is disconnected from supply.
Rated temperature of connecting cables: see Section 7.
