KROHNE ALTOFLUX 2W IFM 4042K EEx-ATEX EN - Manual (Page 9)

ALTOFLUX 2W IFM 4042 K - EEx 9
2.5 Safety-technical data
Important The functional-technical data must also be regarded,
therefore see the standard installation and operating instructions.
Safety-technical data of output circuits
Terminal
Function Electrical data (per circuit)
designation Type of protection "EEx ib" Type of protection "EEx e"
Circuit 1
I, I
⊥
Current output, passive
(2-wire connection)
4 - 20 mA, HART =
possible U
n
= 14 - 36 Vdc
I
n
= 4 - 20 mA
U
m
= 250 V
Circuit 2
1L=, 0L= Additional power supply
or Power Booster,
(4-wire connection)
additional to circuit 1
(option)
Maximum values:
U
i
= 30 V, I
i
= 100 mA,
P
i
= 1.0 W
Ci
= 20 nF, Li = 0
U
m
= 60 V
U
n
= 14 - 36 Vdc
I
n
= 22 mA
U
m
= 250 V
Circuit 3
B1, B
⊥
B2, B ⊥
Passive pulse/status
output 1
Passive pulse/status
output 2 Maximum values:
U
i
= 30 V, Ii = 100 mA,
P
i
= 1.0 W
C
i
= 0, Li = 0
U
m
= 60 V
Maximum values:
U
= 36 V
I = 100 mA
U
m
= 250 V
2.6 Connection examples
In the following sections examples for connection of the IFM 4042 K-EEx compact flowmeter are
described for operation in the 2-wire mode as well as in the 2x2-wire mode.
2.6.1 Example of IFM 4042 K in 2-wire mode
The diagram shows an IFM 4042 K-EEx with the terminal compartment in version A (EEx de [ib]
with Um = 60 V). The flowmeter is connected through a transmitter power supply ("EEx i"
approved) in 2-wire mode. If data communication with the flowmeter through the HART protocol is
required, the transmitter power supply unit must be HART compatible. Terminals I, I
⊥ are not
polarity sensitive.
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-EEx compact
flowmeter, namely U
i
= 30 V, I
i
= 100 mA, C
i
= 200 nF, L
i
= 0. Suitable HART compatible trans-
mitter 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
IFM 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