ELECTRICAL CONNECTIONS
3
21
OPTIFLEX 2200 C/F
www.krohne.com
03/2019 - 4005066003 - AD NEPSI OPTIFLEX2200 R03 en
3.5 Ex ia and Ex iaD equipment
3.5.1 How to connect the electrical cables
Refer to the handbook for data about the device terminals.
Cable glands are supplied on customer demand. If you supply the cable glands, this part must
have a degree of ingress protection IP
≥
6X (IEC 60529). We recommend that you use a part that
has a degree of ingress protection IP
≥
66. Make sure that the cable gland is sealed.
Obey the instructions that follow:
•
Use the electrical connection procedure in the Handbook.
•
Put the electrical wires in position and safely attach them to prevent damage. The electrical
wires must also be a sufficient distance from hot surfaces.
•
Make sure that unused electrical wires are safely connected to the ground potential of the
hazardous area. If this is not possible, make sure that each of the unused electrical wires are
safely isolated (other electrical wires, ground etc.) and rated for a test voltage
≥
500 V
RMS
.
•
If it is necessary, make sure the electrical wire insulation gives good protection from
corrosion.
•
Connect only to separate certified, intrinsically-safe circuits. Make sure that the electrical
circuit characteristics are not more than the values that follow.
•
Do not remove more than 6 mm / 0.2
¨
of insulation from the wire.
3.5.2 Maximum intrinsically-safe values for the electrical circuit
3.5.3 Supply voltage
Level transmitter with the 4...20 mA output option
Level transmitter with the PROFIBUS PA or FOUNDATION fieldbus output option
Output option
Intrinsically-safe values for the electrical circuit
U
i
I
i
P
i
C
i
L
i
[V]
[mA]
[W]
[nF]
[
µ
H]
4...20 mA passive - HART
≤
30
≤
300
≤
1
=16
=27
PROFIBUS PA
FOUNDATION
™
fieldbus
Entity
≤
24
≤
300
≤
1.2
=1
=2
FISCO
≤
17.5
≤
380
≤
5.32
=1
=2
Minimum voltage at
output terminals [V DC]
Maximum voltage at
output terminals [V DC]
Current output terminals
11.5
1
30
1
1
For a current output of 22 mA
Minimum voltage at
output terminals [V DC]
Maximum voltage at
output terminals [V DC]
Output terminals
Entity
9
24
FISCO
9
17.5
