ABB FV4000 Operating Instruction page 54

Communication
Current output for alarm
The "High" state (= 21 ... 23 mA) is programmable and corresponds to NAMUR NE43.
Operation using the HART protocol is described in operating instructions D184B108Uxx.
Fig. 41: HART communication
1 FSK modem
Important
Up-to-date DD/EDD data can also be downloaded from the ABB homepage at
http://www.abb.com/flow.
54
4 - 20 mA
= 250 Ω
R
B min
RS232C
1
FV4000 / FS4000
HART
G00790
D184B097U02