KROHNE BM 70 M User Manual
Page 29
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BM 70 M
29
Current output HART
®
, Ex e:
Ex-i current output HART
®
:
Ex-i Current output HART
®
with switching
output:
Current output (non-communicable):
RS 485 version:
PROFIBUS-PA or Foundation Fieldbus (FF)
32 31
-
+
42 41
Current
output
Switching output
max. 100mA/30V DCAC
Digital
input
82 81
- +
- +
5...28V=
4-20mA
max.500
Ω
32 31
-
Ex-i (IS)
+
+
supply unit
+
-
U max.= 30V
Current
output
4-20mA
U min.= 8V
Current-
output
Switching output
max. 110mA/30V
41
42
32 31
+
-
-
+
+
unit
U max.= 30V
4-20mA
U min.
= 8V
Ex-i-supply
32 31
Current
output
- +
unassigned
-
+
4-20mA
max.250
Ω
B
B
A
A
RS 485
input
RS 485
output
32 31
Current
output
- +
-
+
4-20mA
max.250
Ω
32 31
Bus-
connection
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