KROHNE ALTOFLUX IFM4042K EEx EN - Manual (Page 8)

7
Figure 2: Connection of IFM 4042 K-EEx in 2-wire mode.
The entity parameters of the "EEx i" approved transmitter power supply, including the cable
capacitances and inductances, must fit the entity parameters of the IFM 4042 K-EEx
compact flowmeter, namely Uo
≤
30 V, Io
≤
100 mA. Suitable HART compatible transmitter
power supplies that can be used in combination of the Altoflux 2W IFM 4042 K-EEx are:
•
Phoenix PI/Ex-ME-RPSS-I/I;
•
CEAG 6/420.
Figure 3: Connection of IFM 4042 K-EEx.
IFM 4042 K-EEx
(MGM 4042 K-EEx)
I
I
⊥ ⊥
HTT
4-20 mA 4-20 mA
Transmitter Power
Supply (EEx i)
Vs
Hazardous Area
Process/
Display Unit
Safe Area
IFM 4042 K-EEx
(MGM 4042 K-EEx)
I
I
⊥ ⊥
HTT
4-20 mA 4-20 mA
Transmitter Power
Supply (EEx i)
Vs
Hazardous Area
Process/
Display Unit
Safe Area
22 mA
1L=
0L=
+
_
Zener Barrier
External
Power Supply