Manual

4 ELECTRICAL CONNECTIONS
42
IFC 050
www.krohne.com 08/2013 - 4002184002 - MA IFC 050 R02 en
4.11.4 HART
®
connection
Example for active HART
®
connection (point-to-point)
The parallel resistance to the HART
®
communicator must be R ≥ 230 Ω.
Example for passive HART
®
connection (multi-drop mode)
• I: I
0%
≥ 4mA
• Multi-drop mode I: I
fix
≥ 4mA = I
0%
• U
ext
≤ 32 VDC
• R ≥ 230 Ω
INFORMATION!
The current output always has HART
®
capability and is connected at connection terminals A+/A-
/A.
All HART
®
connections (point-to-point and multi-drop operation) both work actively and
passively.
Figure 4-18: HART
®
Anschluss aktiv (I
a
)
1 HART
®
-Kommunikator
Figure 4-19: HART
®
Anschluss passiv (I
p
)
1 HART
®
-Kommunikator
2 Weitere HART
®
- fähige Geräte