KROHNE BM 100A ATEX EN - Manual (Page 6)

Section 1 – Main safety-relevant characteristics
BM 100 A ATEX 10/2001
6
The connected equipment may not exceed the following maximum safety values:
I/O function
Marking Maximum safety values
Passive current
output EEx ia IIC or
EEx ib IIC Ui
≤
30V
Ci
≤
5nF
Ii
≤
250mA
Li = 10
µ
H
Pi
≤
1.0W
Active current
output EEx ia IIC or
EEx ib IIC Uo
≤
23.5V
Co
≤
110nF
Io
≤
98mA
Lo = 3.98
µ
H
Po
≤
0.4W
Interface
PROFIBUS-PA
(1)
EEx ia IIC or
EEx ib IIC/IIB Ui
≤
30V
Ci
≤
5nF
Ii
≤
300mA
Li = 10
µ
H
Pi
≤
4.2W
Interface
FF EEx ia IIC or
EEx ib IIC/IIB Ui
≤
30V
Ci
≤
5nF
Ii
≤
300mA
Li = 10
µ
H
Pi
≤
4.2W
(1)
suitable for connection to intrinsically safe fieldbus systems based on the FISCO model
1.2.2 Non-intrinsically safe I/O functions
For devices with non-intrinsically safe I/O functions the following restrictions should be noted.
I/O function
(1)
Rated values of the non-
certified receiver instrument
Restriction for non-certified receiver
instruments
Refer to standard
Installation and Operating
Instructions
Refer to standard
Installation and Operating
Instructions
Supply power for receiver
instruments: max. 250V
(1)
only for connection to circuits with “functional extra-low voltage with safety separation (PELV)“
1.3 Allowable pressure
The maximum allowable operating pressure for level gauges installed in locations requiring
Category 2 G or 2 D equipment is dependent on the device flange, the flange material and the
maximum operating temperature. The maximum allowable pressure is 10000 kPa (PN100
flange). The upper limit applies e.g. to a stainless steel flange at ambient and process
temperatures of 20°C (e.g. DN 50, PN 100). Higher pressure ratings are not allowed.
For applications requiring Category 1/2 G or 1/2 D equipment, atmospheric application conditions
(operating pressure 80 - 110kPa) must prevail inside the tank.