KROHNE BM 70 M Series, Installation And Operating Instructions Manual

Page: 74 / 110

74 BM 70 M
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.
Hazardous duty systems
•
The incoming cables for power supply are not of intrinsically safe design, not even in the
BM 70 M i version.
•
Electrical connection to be in conformity with VDE 0165, Section 5.6, or equivalent national
regulations.
•
Before making the electrical connection, make sure all cables leading into the BM 70 M-Ex are
disconnected from supply!
•
When used in hazardous locations, the BM 70 M-Ex must, in conformity with VDE 0165, 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 outer U-clamp
terminal on the "neck" of the BM 70 M-Ex. Cancellation of equipotential bonding is only
permitted when the BM 70 M-Ex is disconnected from supply.