Endress+Hauser Levelflex M FMP41C Operating Instructions Manual page 14

Installation
14
3.3.1 Electronics
The process variables are output using the dynamic variables of the HART protocol. The process
variables can be flexibly assigned to the dynamic variables (primary, secondary, tertiary, quaternary
value).
Dynamic variables of the Possible process variable assignment
HART protocol
Primary value (PV) • Interface (default)
• Total level
• Thickness of the upper medium (upper phase)
Secondary value (SV) • Total level (default)
• Interface
• Thickness of the upper medium (upper phase)
Tertiary value (TV) • Thickness of the upper medium
(upper phase) (default)
• Interface
• Total level
• Amplitude of the total level signal
th
Quaternary (4 ) value (QV) Amplitude of the interface level signal
3.3.2 Using the HART loop converter HMX50
The dynamic variables of the HART protocol can be converted into individual 4 to 20 mA sections
using the HART loop converter HMX50. The variables are assigned to the current output and the
measuring ranges to the individual parameters in the HMX50.
Levelflex M
HART
Power
Connection diagram for HART loop converter HMX50 (example: passive 2-wire device and current outputs connected as
power source)
The HART loop converter HMX50 can be acquired using the order number 71063562.
Additional documentation: TI00429F/00/EN and BA00371F/00/EN.
Eingang Relais 1
Relay 1
Input
1
+
+ 2
-
3
Relais 2 Relais 2
Relay 2
4
5
6
Stromausgang 1
Current output 1
Stromausgang 2
Current output 2
Power
versorgung
supply
Current output 3 Stromausgang 3
22 23 24
24V DC
Levelflex M FMP41C 4 to 20 mA HART
Comment
The "primary value" is permanently
assigned to the 4 to 20 mA current
output
—
—
No variable assignment
10
HART Loop Converter HMX50
11
12
16
17
18
7
8
9
13
14
15
19
20
Commubox
FXA195
21
HART
L00-FMP40xIx-04-00-00-en-004
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