.52+1(
BM 70 A Kurzanleitung
Seite: 19
4. Entwurf 03/97
7. Safety information
Insulation rating
The insulation of type BM 70 A level gauges is rated in conformity with VDE
0110/01.89, equivalent to IEC 664, and takes into account the following ratings:
•
overvoltage category for the power line circuit: III
•
overvoltage category for the output circuit: II
•
insulation contamination level: 2 (inside the device)
Disconnecting device
Type BM 70 A level gauges do not feature any device for switching or disconnection.
Hazardous-duty systems
•
Types of protection in the BM 70 A terminal compartment:
Increased Safety “e“ for signal output and power supply
Option: Intrinsic Safety “i“ for the current output and Increased Safety “e“
for power supply
Special version: Flameproof Enclosure “d“ for the terminal compartment
•
Consult the relevant wiring and installation regulations, e.g. VDE 0165, before
mounting, dismantling or making electrical connections in the hazardous
location.
•
Before making the electrical connection, make sure all cables leading into the
BM 70 A-Ex are disconnected from supply!
•
In the BM 70 A version with an intrinsically safe current output, only equipment
that has been certified as intrinsically safe may be connected to the blue marked
terminals, even if the device is not operated in the hazardous location!
Rated temperature of connecting cables:
Version
T
M
°C
T
cable
°C
Horn antenna / Wave-Guide
< 90
T
amb
20
%DVLFYHUVLRQ
< 110
T
amb
25
< 130
T
amb
30
Horn antenna / Wave-Guide
< 150
T
amb
20
+LJKWHPSHUDWXUHYHUVLRQ
< 200
T
amb
25
< 250
T
amb
30
Wave-Stick
< 100
T
amb
20
< 150
T
amb
30
T
M
=
product temperature or
flange temperature
T
cable
= rated temperature of
connecting cables
T
amb
= max. ambient temperature
of signal converter
