KROHNE BM 70 A Installation And Operating Instructions Manual page 65

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.
HAZARDOUS-DUTY SYSTEMS
• The incoming cables for power supply are not of intrinsically safe design, not even in the
BM 70 A/P 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 A/P-Ex are
disconnected from supply!
• When used in hazardous locations, the BM 70 A/P-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 A/P-Ex. Cancellation of equipotential bonding is only
permitted when the BM 70 A/P-Ex is disconnected from supply.
Installation and operating instructions BM 70 A/P Page: 65 11/00