Endress+Hauser Prosonic M FMU40 Manual

TI00365F/00/EN/13.11
71132594
Technical Information
Prosonic M FMU40/41/42/43/44
Ultrasonic Level Measurement
Compact transmitters for non-contact level measurement of fluids,
pastes and coarse bulk materials
Application
• Continuous, non-contact level measurement in fluids,
pastes, sullages and coarse bulk materials
• Flow measurement in open channels and measuring
weirs
• System integration via:
– HART (standard), 4 to 20mA
–PROFIBUSPA
– FOUNDATION Fieldbus
• Maximum measuring range:
– FMU40: 5 m (16 ft) in fluids,
2 m (6.6 ft) in bulk materials
– FMU41: 8 m (26 ft) in fluids,
3,5 m (11 ft) in bulk materials
– FMU42: 10 m (33 ft) in fluids,
5 m (16 ft) in bulk materials
– FMU43: 15 m (49 ft) in fluids,
7 m (23 ft) in bulk materials
– FMU44: 20 m (66 ft) in fluids,
10 m (33 ft) in bulk materials
Features and benefits
• Quick and simple commissioning via menu-guided on-
site operation with four-line plain text display;
7 languages selectable
• Envelope curves on the on-site display for simple
diagnosis
• Easy remote operation, diagnosis and measuring point
documentation with the free operating program
FieldCare supplied.
• Suitable for explosion hazardous areas
(Gas-Ex, Dust-Ex)
• Linearisation function (up to 32 points) for conversion
of the measured value into any unit of length, volume
or flow rate
• Non-contact measurement method minimizes service
requirements
• optional remote display and operation (up to 20 m
(66 ft) from transmitter)
• Installation possible from thread G 1½“ or 1½ NPT
upwards
• Integrated temperature sensor for automatic
correction of the temperature dependent sound
velocity

Prosonic M
2Endress+Hauser
Table of contents
Function and system design. . . . . . . . . . . . . . . . . . . . . 3
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Equipment architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Measuring range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Load HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output damping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Linearisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Auxiliary energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Terminal compartment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Fieldbus plug connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Cable entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Current consumption (2-wire-instruments) . . . . . . . . . . . . . . . . . 13
HART ripple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Max. noise HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Performance characteristics. . . . . . . . . . . . . . . . . . . . 14
Reaction time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Measured value resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pulse frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Measuring error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Influence of the vapor pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Installation conditions . . . . . . . . . . . . . . . . . . . . . . . . 15
Installation variants FMU40, FMU41 . . . . . . . . . . . . . . . . . . . . . 15
Installation variants FMU42, FMU44 . . . . . . . . . . . . . . . . . . . . . 15
Installation variants FMU43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Installation conditions for level measurements . . . . . . . . . . . . . . 16
Installation in narrow shafts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Installation conditions for flow measurements . . . . . . . . . . . . . . . 17
Blocking distance, nozzle installation . . . . . . . . . . . . . . . . . . . . . 19
Operating conditions: Environment. . . . . . . . . . . . . . 20
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Resistance to alternating temperature cycles . . . . . . . . . . . . . . . . 20
Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ingress protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . 20
Operating conditions: Process . . . . . . . . . . . . . . . . . . 20
Process temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Process pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 21
Design; dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Housing design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Process connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Material (not in contact with process) . . . . . . . . . . . . . . . . . . . . . 25
Material (in contact with process) . . . . . . . . . . . . . . . . . . . . . . . . 26
Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Display and operating elements . . . . . . . . . . . . . . . . . . . . . . . . . 27
On-site operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Remote operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Certificates and Approvals . . . . . . . . . . . . . . . . . . . . . 30
CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
External standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . 30
Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . 31
Product structure FMU40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Product structure FMU41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Product structure FMU42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Product structure FMU43 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Product structure FMU44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Weather protection cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Installation bracket for FMU40, FMU41 . . . . . . . . . . . . . . . . . . . 39
Screw in flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Cantilever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Mounting Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Wall Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Commubox FXA195 HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Commubox FXA291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
ToF Adapter FXA291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Remote display FHX40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Additional documentation . . . . . . . . . . . . . . . . . . . . . 46
System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Operating manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Description of device functions . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Short instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Safety Instructions ATEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Safety Instructions NEPSI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Control drawings Installation drawings . . . . . . . . . . . . . . . . . . . . 49

Prosonic M
Endress+Hauser 3
Function and system design
Measuring principle
L00-FMU4x-15-00-00-xx-001
E: Empty distance; F: Span (full distance); D: Distance from sensor membrane - product surface; L: Level; BD: Blocking
distance
Time-of-flight method
The sensor of the Prosonic M transmits ultrasonic pulses in the direction of the product surface. There, they
are reflected back and received by the sensor. The Prosonic M measures the time t between pulse transmission
and reception. The instrument uses the time t (and the velocity of sound c) to calculate the distance D between
the sensor membrane and the product surface:
D = c ⋅t/2
As the device knows the empty distance E from a user entry, it can calculate the level as follows:
L = E - D
An integrated temperature sensor compensates for changes in the velocity of sound caused by temperature
changes.
Interference echo suppression
The interference echo suppression feature on the Prosonic M ensures that interference echos (e.g. from edges,
welded joints and installations) are not interpreted as a level echo.
Calibration
Enter the empty distance E and the span F to calibrate the device.
Blocking distance
Span F may not extend into the blocking distance BD. Level echos within the blocking distance cannot be
evaluated due to the transient characteristics of the sensor.
20 mA
100%
4mA
0%
D
L
F
E
BD
Sensor BD Max. range fluids Max. range bulk materials
FMU40 0.25 (0.8) 5 (16) 2 (6.6)
FMU41 0.35 (1.1) 8 (26) 3.5 (11)
FMU42 0.4 (1.3) 10 (33) 5 (16)
FMU43 0.6 (2.0) 15 (49) 7 (23)
FMU44 0.5 (1.6) 20 (66) 10 (33)
m (ft)

Prosonic M
4Endress+Hauser
Equipment architecture 4…20 mA output with HART protocol
The complete measuring system consists of:
L00-FMxxxxxx-14-00-06-en-007
If the HART communication resistor is not built into the supply unit, it is necessary to insert a communication
resistor of 250 Ωinto the 2-wire line.
On-site operation
• with display and operating module,
• with a Personal Computer, FXA291 with ToF Adapter FXA291 (USB) and the operating software
"FieldCare". FieldCare is a graphical operating software for instruments from Endress+Hauser (radar,
ultrasonic, guided microimpulse). It assists with commissioning, securing data, signal analysis and
documentation of the measuring point.
Remote operation
• with Field Communicator 375, 475,
• with a Personal Computer, Commubox FXA195 and the operating software "FieldCare".
ENDRESS + HAUSER
E
+–
%
ENDRESS+ HAUSER
RMA422
1
#% &
Copy
GH I
PQ R S
,( ) ‘
AB C
Paste
Page
On
Page
Up
DeleteBksp
Insert
JK L
TU V
_< >
DE F
HotKey
+Hot Key
MN O
WX Y Z
+* /
4
7
.
2
5
8
0
375
FIELD COMMUNICATOR
3
6
9
-
9
6
DELTABAR:** * * * * * *
ONLINE
1 QUICK SETUP
2 OPERATING MENU
4 SV 0°C
3 PV 352mbar
HELP SAVE
dsdmdm
dfdas.
asdasfa
asasla.
1
#% &
Copy
GH I
PQ R S
,( ) ‘
AB C
Paste
Page
On
Page
Up
DeleteBksp
Insert
JK L
TU V
_< >
DE F
HotKey
+Hot Key
MN O
WX Y Z
+* /
4
7
.
2
5
8
0
375
FIELD COMMUNICATOR
3
6
9
-
9
6
DELTABAR:** * * * * * *
ONLINE
1 QUICK SETUP
2 OPERATING MENU
4 SV 0°C
3 PV 352mbar
HELP SAVE
dsdmdm
dfdas.
asdasfa
asasla.
FieldCare
FieldCare
Commubox
FXA195
Field Communicator
375, 475
FXA195
or Field Communicator
375, 475
transmitter power
supply unit
RMA422
or RN221N
(communication resistor
included)
PLC
operating and
display module
Power supply
(for 4-wire)
Commubox FXA291 with
ToF Adapter FXA291

Prosonic M
Endress+Hauser 5
System integration using PROFIBUS PA
A maximum of 32 transmitters (8 if mounted in an explosion hazardous location Ex ia IIC according to FISCO-
model) can be connected to the bus.The segment coupler provides the operating voltage to the bus. Both on-
site as well as remote operation are possible. For further information on the cable specifications, see Operating
Instructions BA00034S/04/ENGuidelines for planning and commissioning PROFIBUS DP/PA", PNO
Guideline 2.092 "PROFIBUS PA User and Installation Guideline" and IEC61158-2 (MBP).
L00-FMxxXXXX-14-00-06-en-001
System integration using FOUNDATION Fieldbus
A maximum of 32 transmitters (standard or Ex d) can be connected to the bus. For protection class Ex ia: the
maximum number of transmitters depends on the established rules and standards for intrinsically safe circuits
(EN 60070-14) and proof of instrinsic safety. Both on-site and remote operation are possible.
L00-FMxxXXXX-14-00-06-en-003
ENDRESS + HAUSER
Micropilot M Prosonic M
Levelflex M
ENDRESS+ HAUSER
E
+–
%
T
PROFIBUS DP
PROFIBUS PA
FieldCare
personal computer with
FieldCare and
Profibard resp. Proficard
segment coupler
PLC
operating and
display module
More
Functions
(valves etc)
Commubox FXA291 with
ToF Adapter FXA291
T T
FF link
Levelflex M
ENDRESS+ HAUSER
E
+–
%
Prosonic M
Micropilot M FieldCare
Field Communicator
375, 475
1
#%&
Copy
GHI
PQR S
,() ‘
ABC
Paste
Page
On
Page
Up
DeleteBksp
Insert
JKL
TUV
_<>
DEF
HotKey
+HotKey
MNO
WXY Z
+*/
4
7
.
2
5
8
0
375
FIELDCOMMUNICATOR
3
6
9
-
9
6
DELTABAR:*** * * * * *
ONLINE
1QUICK SETUP
2OPERATING MENU
4SV 0°C
3PV 352 mbar
HELP SAVE
dsdmdm
dfdas.
asdasfa
asasla.
1
#%&
Copy
GHI
PQR S
,() ‘
ABC
Paste
Page
On
Page
Up
DeleteBksp
Insert
JKL
TUV
_<>
DEF
HotKey
+HotKey
MNO
WXY Z
+*/
4
7
.
2
5
8
0
375
FIELDCOMMUNICATOR
3
6
9
-
9
6
DELTABAR:*** * * * * *
ONLINE
1QUICK SETUP
2OPERATING MENU
4SV 0°C
3PV 352 mbar
HELP SAVE
dsdmdm
dfdas.
asdasfa
asasla.
personal computer
e.g. with
NI-FBUS configurator
operating and
display module
VU331
power supply
power conditioner
power supply
power conditioner
Additional
functions
(valves etc.)
service adapter
• FXA291/ToF Adapter FXA291

Prosonic M
6Endress+Hauser
System integration using Endress+Hauser Rackbus
You can interconnect a maximum of 64 2-wire devices with HART protocol to a Rackbus. Use an FXN672
interface module for each device. You can integrate this bus into a higher-level bus by using gateway.
L00-FMxxXXXX-14-00-06-en-006
!Hinweis!
The FXN672 can be used with all 2-wire devices of the Prosonic M family.
FXN 671
mA1
+
FXN 671
mA1
+
FXN 671
mA1
+
Micropilot M Prosonic M
Levelflex M
ENDRESS+ HAUSER
E
+–
%
FieldCare
FXA291 mit
ToF Adapter FXA291
personal computer
with communication
software
PLC
operating and
display module
VU331
BusRS 232C
Gateway to
MODBUS, FIP,
PROFIBUS,
INTERBUS etc.
FXN672
4 to 20 mA with HART

Prosonic M
Endress+Hauser 7
System integration via Fieldgate
Vendor Managed Inventory
By using Fieldgates to interrogate tank or silo levels remotely, suppliers of raw materials can provide their
regular customers with information about the current supplies at any time and, for example, account for them
in their own production planning. For their part, the Fieldgates monitor the configured level limits and, if
required, automatically activate the next supply. The spectrum of options here ranges from a simple purchasing
requisition via e-mail through to fully automatic order administration by coupling XML data into the planning
systems on both sides.
Remote maintenance of measuring equipment
Fieldgates not only transfer the current measured values, they also alert the responsible standby personnel, if
required, via e-mail or SMS. In the event of an alarm or also when performing routine checks, service
technicians can diagnose and configure connected HART devices remotely. All that is required for this is the
corresponding HART operating software (e.g. FieldCare) for the connected device. Fieldgate passes on the
information transparently, so that all options for the respective operating software are available remotely. Some
on-site service operations can be avoided by using remote diagnosis and remote configuration and all others
can at least be better planned and prepared.
L00-FXA520xx-14-00-06-en-009
Note!
The number of instruments which can be connected in mutidrop mode can be calculated by the "FieldNetCalc"
program. A description of this program can be found in Technical Information TI00400F
(Multidrop Conncector FXN520).
The program is available form your Endress+Hauser sales organisation or in the internet at: "www.endress.com
È select your country È download È search: Fieldnetcalc
-
Fieldgate
FXA520
ENDRESS+HAUSER
RN221N
ENDRESS+HAUSER
RN221N
.
Fieldgate
FXA520 20...45 V
DC
FXN 520
FXN 520
Multidrop-Connector
FXN520
HTTP script
Web browser
…
Analogue
Ethernet
GSM
e.g. 2 x RN221N-B …
Channel 1 Channel 2
via HART Client:
- FieldCare
...
Remote monitoring
Remote configuration/diagnostics

Prosonic M
8Endress+Hauser
Input
Measured variable The distance D between the sensor membrane and the product surface is measured.
Using the linearisation function, the device uses D to calculate:
• level L in any units
• volume V in any units
• flow Q across measuring weirs or open channels in any units
Measuring range The measuring range is limited by the range of a sensor. The sensor range is, in turn, dependent on the
operating conditions. To estimate the actual range, proceed as follows (see also the calculation example in the
diagram):
1. Determine which of the influences shown in the following table are appropriate for your process.
2. Add the corresponding attenuation values.
3. From the total attenuation, use the diagram to calculate the range.
Fluid surface Attenuation
Calm 0 dB
Waves 5 to 10 dB
Strong turbulence (e.g. stirrers) 10 to 20 dB
Foaming Please contact your Endress+Hauser sales representative.
Bulk material surface Attenuation
Hard, rough (e.g. rubble) 40 dB
Soft (e.g. peat, dust-covered clinker) 40 to 60 dB
Dust Attenuation
No dust formation 0 dB
Little dust formation 5 dB
Heavy dust formation 5 to 20 dB
Filling curtain in detection range Attenuation
None 0 dB
Small quantities 5 to 10 dB
Large quantities 10 to 40 dB
Temperature difference between
sensor and product surface
Attenuation
to 20 °C (68 °F) 0 dB
to 40 °C (104 °F) 5 to 10 dB
to 80 °C (176 °F) 10 to 20 dB

Prosonic M
Endress+Hauser 9
L00-FMU4xxxx-05-00-00-xx-002
A: Attenuation (dB), R: Range (m)
Example (for FMU43)
For typical solid applications, a certain amount of dust coverage is normally present. Therefore, the following
range results from the table and the diagram
These measuring conditions have been taken into account during the calculation of the maximum measuring
range in solid applications.
Operating frequency
FMU 40
FMU 41
FMU 43
10 20 30 40 50 60 70 80
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
FMU 42
16
17
18
19
20
FMU 44
A [dB]
R [m]
0
• Dust-covered rubble approx. 50 dB
• no dust formation 0 dB
• No filling curtain in
detection range 0 dB
• Temperature diff. < 20°C 0 dB
approx. 50 dB => range approx. 7 m (23 ft)
Sensor Operating frequency
FMU40 approx. 70 kHz
FMU41 approx. 50 kHz
FMU42 approx. 42 kHz
FMU43 approx. 35 kHz
FMU44 approx. 30 kHz

Prosonic M
10 Endress+Hauser
Output
Output signal according to the instrument version ordered:
• 4…20 mA with HART protocol
• PROFIBUS PA
• FOUNDATION Fieldbus
Signal on alarm Error information can be accessed via the following interfaces:
• On-site display (error symbol, error code and plain text description)
• Current output (error current configurable)
• Digital interface
Load HART Minimum load for HART communication: 250 Ω
Output damping Freely selectable, 0 to 255 s
Linearisation The linearisation function of the Prosonic M allows conversion of the measured value into any unit of length
or volume. In open channels or measuring weirs, also a flow linearistion is possible (calculation of the flow from
the measured level). The linearisation table for calculating the volume in an horizontal cylindrical tank is
preprogrammed. You can also enter any number of other tables containing up to 32 value pairs either manually
or semi-automatically (by filling the vessel under controlled conditions).
The supplied FieldCare operating program can automatically calculate the table for any tank, weir or flume and
upload it into the device.
Flow curves for open channels can be calculated and entered into the instrument by the FieldCare as well
(→ä28, "Operation with FieldCare").

Prosonic M
Endress+Hauser 11
Auxiliary energy
Terminal compartment In the F12 housing, the terminals are located underneath the housing cover. In the T12 housing, they are under
the cover of the separate terminal compartment.
L00-FMR2xxxx-04-00-00-en-001
Terminal assignment
• Connect the connecting line to the screw terminals (line cross-sections of 0.5 to 2.5mm2(20 to 14 AWG))
in the terminal compartment.
• Use 2-wire twisted pair cable with screen for the connection.
• Protective circuitry against reverse polarity, RFI and over-voltage peaks is built into the device (see also
Technical Information TI00241F/00/EN "EMC Test Procedures") →ä20, "Electromagnetic compatibility
(EMC)".
• A standard installation cable is sufficient if only the analogue signal is used. Use a screened cable when
working with a superimposed communication signal (HART).
sealed terminal
compartment
F12 housing T12 housing
4 to 20 mA with HART, 2-wire
L00-FMxxxxxx-04-00-00-en-015
4 to 20 mA active with HART, 4-wire
L00-FMxxxxxx-04-00-00-en-011
Commubox FXA195
Field Communicator 375, 475
power
56
I+ I-
12
L1/L+ N/L-
4...20mA
Commubox FXA195
Field Communicator
375, 475
AC / DCDC
alternatively
power
display unit,
recorder, PCS
plant
ground

Prosonic M
12 Endress+Hauser
The digital communication signal is transmitted to the bus via a 2-wire connection. The bus also provides the
auxiliary energy. Use 2-wire twisted pair cable with screen.
Refer to the following operating manuals for information on cable types, and how to set up and ground the
network:
• BA00034S "PROFIBUS DP/PA: "Guidelines for planning and commissioning PROFIBUS DP/PA", PNO
Guideline 2.092 "PROFIBUS PA User and Installation Guideline" and IEC61158-2 (MBP).
• BA00013S "FOUNDATION Fieldbus Overview", FONDATION Fieldbus Guideline and IEC61158-2 (MBP).
Fieldbus plug connectors For the versions with fieldbus plug connector (M12 or 7/8"), the signal line can be connected without opening
the housing.
Pin assignment of the M12 plug connector (PROFIBUS PA plug)
Pin assignment of the 7/8" plug connector (FOUNDATION Fieldbus plug)
Supply voltage HART, 2-wire
The following values are the voltages across the terminals directly at the instrument:
PROFIBUS PA
L00-FMxxxxxx-04-00-00-en-012
FOUNDATION Fieldbus
L00-FMxxxxxx-04-00-00-en-013
34 12
+–
T-Box
PROFIBUS PA
plant
ground
34 12
+–
plant
ground
L00-FMxxxxxx-04-00-00-yy-016
Pin Meaning
1 Signal +
2notconnected
3 Signal -
4 Ground
L00-FMxxxxxx-04-00-00-yy-017
Pin Meaning
1 Signal -
2 Signal +
3notconnected
4 Ground
1
43
2
+
–
nc
2
13
4
+
–nc

Prosonic M
Endress+Hauser 13
HART, 4-wire, active
Terminals Cable cross-section: 0.5 to 2.5 mm2(20 to 14 AWG)
Cable entry • Cable gland: M20x1.5 (recommended cable diameter 6 to 10 mm (0.24 to 0.39 in))
• Cable entry G ½ or ½ NPT
• PROFIBUS PA M12 plug
• FOUNDATION Fieldbus 7/8" plug
Power consumption
Current consumption
(2-wire-instruments)
HART ripple 47 to 125 Hz: Vpp = 200 mV (measured at 500 Ω)
Max. noise HART 500 Hz to 10 kHz: Vrms = 2.2 mV (measured at 500 Ω)
Galvanic isolation With 4-wire devices, the evaluation electronics and mains voltage are galvanically isolated from each other.
Version Current
consumption
Terminal voltage
minimum
Terminal voltage
maximum
2-wire HART
Standard
4 mA 14 V 36 V
20 mA 8 V 36 V
Ex ia
4 mA 14 V 30 V
20 mA 8 V 30 V
Ex d
4 mA 14 V 30 V
20 mA 11 V 30 V
Fixed current,
adjustable, e.g. for
solar power
operation
(measured value via
HART)
Standard 11 mA 10 V 36 V
Ex ia 11 mA 10 V 30 V
Fixed current for
HART multidrop
mode
Standard 4 mA1)
1) Start-up current 11 mA
14 V 36 V
Ex ia 4 mA114 V 30 V
Version Voltage max. load
DC 10.5 to 32 V 600 Ω
AC 50/60 Hz 90 to 253 V 600 Ω
Version Power consumption
2-wire 51 mW to 800 mW
4-wire AC max. 4VA
4-wire DC; FMU40/41 330 mW to 830 mW
4-wire DC; FMU42/43 600 mW to 1 W
Communication Current consumption
HART 3,6 to 22 mA
PROFIBUS PA max. 13 mA
FOUNDATION Fieldbus max. 15 mA

Prosonic M
14 Endress+Hauser
Performance characteristics
Reaction time The reaction time depends on the parameter settings. The minimum values are:
• 2-wire devices (FMU40/41/42): min. 2 s
• 2-wire diveces (FMU43 - PROFIBUS PA or FOUNDATION Fieldbus): min. 2 s
• 2-wire devices (FMU44): min. 3 s
• 4-wire devices (FMU40/41/42/43/44): 0.5 s
Reference operating
conditions
• Temperature = +20 °C (68 °F)
• Pressure = 1013 mbar abs. (15 psi abs.)
• Humidity = 50 %
• Ideal reflective surface (e.g. calm, smooth fluid surface)
• No interference reflections within signal beam
• Set application parameters:
– Tank shape = flat ceiling
– Medium property = liquid
– Process conditions = calm surface
Measured value resolution
Pulse frequency • 2-wire devices (FMU40/41/42): max. 0.5Hz
• 2-wire devices (FMU43 - PROFIBUS PA or FOUNDATION Fieldbus): max. 0.5 Hz
• 2-wire devices (FMU44): max. 0.3 Hz
• 4-wire devices (FMU40/41/42/43/44): max. 2Hz
The exact values are dependent on the type of device and the parameter settings.
Measuring error Typical specifications for reference operating conditions (include linearity, repeatability, and hysteresis):
1whichever is greater
Influence of the vapor
pressure
The vapor pressure at 20 °C (68 °F) gives a hint on the accuracy of the ultrasonic level measurement. If the
vapor pressure at 20 °C (68 °F) is below 50 mbar (1 psi), ultrasonic level measurement is possible with a very
high accuracy. This is valid for water, aqueous solutions, water-solid-solutions, dilute acids (hydrochloric acid,
sulfuric acid, ...), dilute bases (caustic soda, ...), oils, greases, slurries, pastes, ...
High vapor pressures or outgassing media (ethanol, acetone, ammonia, ...) can influence the accuracy. If
conditions like these are present, please contact your Endress+Hauser sales representative.
Sensor Measured value resolution
FMU40 1 mm (0.04 in)
FMU41 1 mm (0.04 in)
FMU42 2 mm (0.08 in)
FMU43 2 mm (0.08 in)
FMU44 2 mm (0.08 in)
Sensor Measuring error
FMU40 ±2 mm (0.08 in) or 0.2% of set measuring distance (empty calibration)1
FMU41 ± 2 mm (0.08 in) or 0,2% of set measuring distance (empty calibration)1
FMU42 ± 4 mm (0.16 in) or 0,2% of set measuring distance (empty calibration)1
FMU43 ± 4 mm (0.16 in) or 0,2% of set measuring distance (empty calibration)1
FMU44 ± 4 mm (0.16 in) or 0,2% of set measuring distance (empty calibration)1

Prosonic M
Endress+Hauser 15
Installation conditions
Installation variants FMU40,
FMU41
L00-FMU4xxxx-17-00-00-en-002
For installation bracket or adapter flange →ä39, "Accessories".
Installation variants FMU42,
FMU44
L00-FMU42xxxx-17-00-00-en-001
ENDRESS+HAUSER
ProsonicM
Installation with sleeveInstallation with counter nut
Installation with installation bracket
counter nut (PC)
supplied
for G 1½” and
G 2” instruments
adapter flange
sensor nozzle
Sealing ring
(EPDM)
supplied
Installation with adapter flange
Sealing ring
(EPDM)
supplied
ENDRESS+HAUSER
Prosonic M
-.
Installation with universal flange Installation with mounting bracket
e.g. Zone 20 Zone 20

Prosonic M
16 Endress+Hauser
Installation variants FMU43
L00-FMU43xxxx-17-00-00-en-001
Installation conditions for
level measurements
L00-FMU4xxxx-17-00-00-de-005
• Do not install the sensor in the middle of the tank (3). We recommend leaving a distance between the sensor
and the tank wall (1) measuring 1/6 of the tank diameter.
• Use a protective cover, in order to protect the device from direct sun or rain (2) →ä39, "Weather
protection cover".
• Avoid measurements through the filling curtain (4).
• Make sure that equipment (5) such as limit switches, temperature sensors, etc. are not located within the
emitting angle α. In particular, symmetrical equipment (6) such as heating coils, baffles etc. can influence
measurement.
• Align the sensor so that it is vertical to the product surface (7).
• Never install two ultrasonic measuring devices in a tank, as the two signals may affect each other.
• To estimate the detection range, use the 3 dB emitting angle α.
ENDRESS+HAUSER
Prosonic M
-.
Zone 20
Installation with
mounting bracket
Installation with
universal slip-on flange (option)
slip-on flange
sensor
nozzle e.g.Zone 20
1
234
5
6
1/6D
7
D
r
a
L
Sensor αLmax rmax
FMU40 11° 5 (16) 0,48 (1.6)
FMU41 11° 8 (26) 0,77 (2.5)
FMU42 9° 10 (33) 0,79 (2.6)
FMU43 6° 15 (49) 0,79 (2.6)
FMU44 11 ° 20 (66) 1,93 (6.3)
m (ft)

Prosonic M
Endress+Hauser 17
Installation in narrow shafts
Installation conditions for flow
measurements
• Install the Prosonic M at the inflow side, as close above the maximum water level Hmax as possible (take into
account the blocking distance BD).
• Position the Prosonic M in the middle of the channel or weir.
• Align the sensor membrane parallel to the water surface.
• Keep to the installation distance of the channel or weir.
• You can enter the "Flow to Level" linearisation curve ("Q/h curve") using FieldCare or manually via the on-
site display.
Example: Khafagi-Venturi flume
L00-FMU4xxxx-17-00-00-en-003
A: Khafagi-Venturi flume, B: inflow, C: outflow, BD: blocking distance, E: empty calibration, F: full calibration,
V: direction of flow
In narrow shafts with strong interference echoes, we
recommend using an ultrasound guide pipe (e.g. PE
or PVC wastewater pipe) with a minimum diameter
of 100 mm (3.94 in).
Make sure that the pipe is not soiled by accumulated
dirt. If necessary, clean the pipe at regular intervals.
L00-FMU4xxxx-17-00-00-en-010
ENDRESS+HAUSER
ProsonicM
ENDRESS+HAUSER
ProsonicM
ENDRESS+HAUSER
ProsonicM
ENDRESS+HAUSER
ProsonicM
venting
hole
1xb
0
b0
BD
A
E
BC
V
H
max
=F

Prosonic M
18 Endress+Hauser
Example: Triangular weir
L00-FMU4xxxx-17-00-00-xx-012
BD: blocking distance, E: empty calibration, F: full calibration
max
max
max
max (= F)
min. 3 H
H
min. 2 H
a
min. 2 H
BD
E

Prosonic M
Endress+Hauser 19
Blocking distance,
nozzle installation
Install the Prosonic M at a height so that the blocking distance BD is not undershot, even at maximum fill level.
Use a pipe nozzle if you cannot maintain the blocking distance in any other way. The interior of the nozzle
must be smooth and may not contain any edges or welded joints. In particular, there should be no burr on the
inside of the tank side nozzle end. Note the specified limits for nozzle diameter and length. To minimise
disturbing factors, we recommend an angled socket edge (ideally 45°).
L00-FMU4xxxx-17-00-00-xx-004
BD: blocking distance; SD: safety distance; E: empty calibration; F: full calibration (span); D: nozzle diameter; L: nozzle
length
Caution!
If the blocking distance is undershot, it may cause device malfunction.
Note!
In order to notice if the level approaches the blocking distance, you can specify a safety distance (SD). If the
level is within this safety distance, the Prosonic M outputs a warning or alarm message.
F
E
BD
SD
L
D
FMU40/41
L
D
FMU43
L
D
FMU42/44
Maximum nozzle length [mm (in)]
Nozzle diameter FMU40 FMU41 FMU42 FMU43 FMU44
DN50/2" 80 (3.15)
DN80/3" 240 (9.45) 240 (9.45) 250 (9.84)
DN100/4" 300 (11.8) 300 (11.8) 300 (11.8) 300 (11.8)
DN150/6" 400 (15.7) 400 (15.7) 400 (15.7) 300 (11.8) 400 (15.7)
DN200/8" 400 (15.7) 400 (15.7) 400 (15.7) 300 (11.8) 400 (15.7)
DN250/10" 400 (15.7) 400 (15.7) 400 (15.7) 300 (11.8) 400 (15.7)
DN300/12" 400 (15.7) 400 (15.7) 400 (15.7) 300 (11.8) 400 (15.7)
Sensor characteristics
Emitting angle α11° 11° 9° 6° 11°
Blocking distance [m (ft)] 0.25 (0.8) 0.35 (1.1) 0.4 (1.3) 0.6 (2.0) 0.5 (1.6)
Max. range [m (ft)]
in liquids
5 (16.0) 8 (26.0) 10 (33.0) 15 (49.0) 20 (66.0)
Max. range [m (ft)]
in solids
2 (6.6) 3.5 (11.0) 5 (16.0) 7 (23.0) 10 (33.0)

Prosonic M
20 Endress+Hauser
Operating conditions: Environment
Ambient temperature -40 °C to +80 °C (-40 °F to +176 °F)
The functionality of the LC display becomes restricted at Tu<-20 °C (Tu<-4 °F) and Tu>+60 °C (Tu>140 °F).
If the device is operated outdoors in strong sunlight, you should use a protective cover →ä39, "Weather
protection cover".
Storage temperature -40 °C to +80 °C (-40 °F to +176 °F)
Resistance to alternating
temperature cycles
to DIN EN 60068-2-14; Nb test : +80°C/-40°C, 1K/min, 100cycles
Climate class DIN EN 60068-2-38 (Test Z/AD) DIN/IEC 68 T2-30Db
Ingress protection • With closed housing, tested according to
– IP 68, NEMA 6P (24h at 1.83 m (6 ft) under water surface)
– IP 66, NEMA 4x
• With open housing: IP 20, NEMA 1 (also ingress protection of the display)
Caution!
Degree of protection IP 68 NEMA 6P applies for M12 PROFIBUS-PA plugs only when the PROFIBUS cable is
plugged in.
Vibration resistance DIN EN 60068-2-64 / IEC 68-2-64: 20…2000 Hz, 1 (m/s2)2/Hz; 3 x 100 min
Electromagnetic compatibility
(EMC)
• Electromagnetic compatibility according to all relevant requirements of the EN 61326- series and NAMUR
recommendation EMC (NE21). For details see declaration of conformity.
• A standard installation cable is sufficient if only the analogue signal is used. Use a screened cable when
working with a superimposed communication signal (HART).
Operating conditions: Process
Process temperature -40°C to +80°C (-40 °F ... +176 °F)
A temperature sensor is integrated in the sensor for correction of the temperature-dependent time-of-flight.
Process pressure • FMU40/41: 0.7 bar to 3bar abs. (10.15 psi ... 43.5 psi abs.)
• FMU42/43/44: 0.7 bar to 2.5bar abs. (10.15 psi ... 36.25 psi abs.)