Endress+Hauser Prosonic S FMU90 Manual

TI397F/00/en/04.07
Technical Information
Prosonic S FMU90
Transmitter in housing for field or top-hat rail mounting
for the ultrasonic sensors FDU91/91F/92/93/95/96
Application for level measurement
• Continuous, non-contact level measurement of fluids,
pastes, sludge and powdery to coarse bulk materials
with 1 or 2 ultrasonic sensors
• Measuring range up to 70 m
(depending on sensor and material measured)
• Level limit detection (up to 6 relays)
• Pump control (alternating); rake control
• Option: additional pump control functions (pump
function test, ...)
• Calculations: average, difference, sum
Application for flow measurement
• Flow measurement in open channels and measuring
weirs with 1 or 2 ultrasonic sensors
• Simultaneous measurement of level and flow in a
stormwater overflow basin with only 1 sensor
• Flow measurement with back water detection (2
sensors) or sludge detection
• Up to 3 totalizers and 3 (resettable) counters;
optionally resettable via digital inputs
• Counting or time pulse output for control of external
units
Your benefits
• Simple, menu-guided operation with 6-line plain text
display; 15 languages selectable
• Envelope curves on the display for quick and simple
diagnosis
• Easy operation, diagnosis and measuring point
documentation with the supplied "ToF-Tool -
FieldTool Package" operating program.
• Option: four digital inputs (e.g. for pump feedback)
and one external temperature input
• Time-of-flight correction via integrated or external
temperature sensors
• Linearisation (up to 32 points, freely configurable)
• Linearisation tables for the most common flumes and
weirs pre-programmed and selectable
• Online calculation of the flume-/weir-flows via
integrated flow curves
• Pre-programmed pump control routines
• System integration via HART or PROFIBUS DP
• Automatic detection of the sensors FDU9x
• The sensors of the former series FDU8x can be
connected (for certificates see note on page 8)

Prosonic S FMU90
2Endress + Hauser
Table of Contents
Function and system design. . . . . . . . . . . . . . . . . . . . . 3
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Blocking distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Time-of-flight correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Interference echo suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pump control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Linearisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Special functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Datalog functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Application examples for level measurements . . . . . . . . . . . . . . . . 5
Application examples for flow measurements . . . . . . . . . . . . . . . . 6
System integration HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
System integration
PROFIBUS DP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Sensor inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
External limit switches
(option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
External temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Analogue outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Relay outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PROFIBUS DP interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Auxiliary energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Supply voltage/
Power consumption/
Current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . 11
Terminal compartment of the field housing . . . . . . . . . . . . . . . . . 11
Cable entries of the field housing . . . . . . . . . . . . . . . . . . . . . . . . 11
Terminal compartment of the DIN-rail housing . . . . . . . . . . . . . . 12
Terminal assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Connection of the sensors FDU9x . . . . . . . . . . . . . . . . . . . . . . . . 16
Synchronization line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connection of the separate display and operating module . . . . . . 17
Connection of external switches
(for FMU90-********B***) . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Connection of a temperature sensor . . . . . . . . . . . . . . . . . . . . . . 19
Performance characteristics. . . . . . . . . . . . . . . . . . . . 20
Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Measuring uncertainty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Typical accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Measured value resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Measuring frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ambient conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Ingress protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electromagnetic compatibility (EMC) . . . . . . . . . . . . . . . . . . . . . 20
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 21
Housing versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Dimensions of the field housing . . . . . . . . . . . . . . . . . . . . . . . . . 21
Dimensions of the DIN-rail housing . . . . . . . . . . . . . . . . . . . . . . 22
Dimensions of the separate display and operating module . . . . . . 24
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Display and operating module . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Operating menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Basic setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Locking of the instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Certificates and Approvals . . . . . . . . . . . . . . . . . . . . . 26
CE mark . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Ex approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
External standards and guidelines . . . . . . . . . . . . . . . . . . . . . . . . 26
Ordering information. . . . . . . . . . . . . . . . . . . . . . . . . 27
Product structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Commubox FXA191 HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Commubox FXA195 HART . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Commubox FXA291 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Protection cover for the field housing . . . . . . . . . . . . . . . . . . . . . 28
Mounting plate for the field housing . . . . . . . . . . . . . . . . . . . . . . 28
Mounting bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Adaption plate for remote display . . . . . . . . . . . . . . . . . . . . . . . . 29
Overvoltage protection HAW56x . . . . . . . . . . . . . . . . . . . . . . . . 30
Temperature sensor FMT131 . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Supplementary documentation . . . . . . . . . . . . . . . . . 35
Innovation booklet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Operating instructions
(for transmitter FMU90) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Description of Instrument Functions . . . . . . . . . . . . . . . . . . . . . . 35

Prosonic S FMU90
Endress + Hauser 3
Function and system design
Measuring principle
L00-FMU90xxx-15-00-08-xx-009
BD: blocking distance; D: distance from sensor membrane to fluid surface; E: empty distance F: span (full distance);
L: level; V: volume (or mass); Q: flow
The sensor transmits ultrasonic pulses in the direction of the product surface. There, they are reflected back
and received by the sensor. The transmitter Prosonic S measures the time t between pulse transmission and
reception. From t (and the velocity of sound c) it calculates the distance D from the sensor membrane to the
product surface:
D = c · t/2
From D results the desired measuring value:
• level L
• volume V
• flow Q across measuring weirs or open channels
Blocking distance The span F may not extend into the blocking distance BD. Level echos from the blocking distance can not be
evaluated due to the transient characteristics of the sensor. The blocking distances of the individual sensors are
given in the following documents:
• TI 396F for the sensors FDU 91/91F/92/93/95/96
• TI 189F for the sensors FDU 80/80F/81/81F/82/83/84/85/86
Time-of-flight correction In order to compensate for temperature dependent time-of-flight changes, a temperature sensor is integrated
in the ultrasonic sensors.
Optionally, the Prosonic S FMU90 has an input for an external temperature sensor
(FMU90-********B***). The following sensor can be connected:
• Pt100
• FMT131 from Endress+Hauser
The external sensor mus be used for the heated version of the ulstrasonic sensor FDU91.
Interference echo suppression The interference echo suppression feature of the Prosonic S ensures that interference echos (e.g. from edges,
welded joints and installations) are not interpreted as a level echo.
Pump control individaully configurable for each pump:
• pump switching delay, e.g. to prevent overlaod of the power supply system
• backlash time and backlash interval, e.g. for complete draining of shafts or channels
• crust reduction at pump shaft walls by fine adjustment of the switch point
FDU9x
Prosonic S
FMU90
Prosonic S
FMU90
FDU9x
D
Q
100%
0%
D
L
F
E
BD
V

Prosonic S FMU90
4Endress + Hauser
Linearisation Pre-programmed linearisation curves
Types of vessels
• horizontal, cylindrical tank
• spherical tank
• tank with pyramidal bottom
• tank with conical bottom
• tank with flat, inclined bottom
Flow curves for flumes and weirs1)
• Khafagi-Venturi flume
• ISO-Venturi flume
•BST
2)-Venturi flume
• Parshall flume
• Palmer-Bowlus flume
• Rectangular weir
• Rectangular constricted weir
•NFX
3) rectangular weir
•NFX
3rectangular constricted weir
• Trapezoidal weir
• V-notch weir
•BST
2V-notch wier
•NFX
3V-notch weir
The pre-programmed linearisation curves are calculated on-line.
Linearisation formula for flow measurements1
Q = C (hα+ γhβ)
"h" is the upstream level. The parameters α, β, γand C can be freely programmed by the user.
Linearisation table
consisting of up to 32 linearisation points; to be entered manually or half-automatically.
Special functions • limit detection
• rake control
• alternating pump control or control according to pump rate (standard)
• option: additional pump control functions4):
– Alternation accordint to runtime or starts
– pump feedback via the optional digital inputs; stand-by pump configurable
– pump function test after resting time
– storm function to prevent unnecessary pump running times
– flush control for regular pump shaft cleaning
– pump control according to tariff times via digital input
– output of operating hours alarm or pump alarm
– recording of pump data (operating hours, number of starts, last running time)
• totalising of the flow volume with (resettable) counters and (non-resettable) totalisers1
• triggering of a sampler by time or quantity pulses1
• low flow cut off1
• backwater detection in flumes1
• sludge detection in flumes1
• trend detection
Datalog functions • Peak hold indicator of the min./max. levels or flows and the min./max. temperatures at the sensors
• Recording of the last 10 alarms
• Indication of the operating status
• Trend indication of the outputs on the on-site display
• Indication of the operating hours
1) for instrument versions with flow software (FMU90 - *2**********)
2) BST: British Standard
3) French standard NFX 10-311
4) for instruments with software for additional pump control (FMU90-*3********** or FMU90-*4**********)

Prosonic S FMU90
Endress + Hauser 5
Application examples for level
measurements
Level measurement with limit detection and
alarm output
L00-FMU90xxx-15-00-00-xx-010
Order code e.g.: FMU90 - *1***131****
(1 input, 3 relays, 1 outputs)
Average level measurement
L00-FMU90xxx-15-00-00-xx-003
Order code e.g.: FMU90 - *1***212****
(2 inputs, 2 outputs)
min
Prosonic S
max
min
L
FDU9x
L
max
Prosonic S
L1 + L2
2
L1 L2
Rake control
(differential measurement)
L00-FMU90xxx-15-00-00-xx-004
Order code e.g.: FMU90 - *1***212****
(2 inputs, 1 relay, 2 outputs)
Alternating pump control
(up to 6 pumps)
L00-FMU90xxx-15-00-00-xx-007
Order code e.g.: FMU90 - *1***131****
(1 input, 3 relays)
Prosonic S
D1
D2 M
L
Prosonic S
Conveyor belt
L00-FMU90xxx-15-00-00-xx-005
Order code e.g.: FMU90 - *1***111****
(1 input, 1 output)
D
Prosonic S

Prosonic S FMU90
6Endress + Hauser
Application examples for flow
measurements
Pulses for volume counter + time pulses (e.g. for
sampler)
L00-FMU90xxx-15-00-00-xx-011
Order code e.g.: FMU90 - *2***131****
(1 input, 3 relays, 1 output)
Flow measurement with backwater alarm or
sludge detection
If the ratio "downstream level:upstream level" rises
above or falls below a critical value, an alarm will be
generated.
L00-FMU90xxx-15-00-00-xx-008
Order code e.g.: FMU90 - *2***212****
(2 inputs, 1 relay, 2 outputs)
FDU9x
D
Q
Prosonic S
123m
3
Q
Prosonic S
Stormwater overflow bassin
Simultaneous measurement of level L and flow Q
with 1 sensor.
L00-FMU90xxx-15-00-00-xx-006
Order code e.g.: FMU90 - *2***112****
(1 input, 2 outputs)
L
Q(l/s)
L (m)
Q (l/s)
Prosonic S
123m
3

Prosonic S FMU90
Endress + Hauser 7
System integration HART
L00-FMU90xxx-14-00-00-xx-009
In the standard version a HART signal is superimposed onto the first output current. In order to use the HART
communication, the circuit must contain a communication resistor of 250Ω.
Operating options
• via the operating and display module at the Prosonic S (if present)
• via the service interface of the Prosonic S with the Commubox FXA291 and the operating program "ToF Tool
- FieldTool Package" or "FieldCare"
• via the HART protocol, e.g. with the Commubox FXA191 or FXA195 and the operating program "ToF Tool
- FieldTool Package" or "FieldCare"
• via the HART handheld terminal DXR375
System integration
PROFIBUS DP
L00-FMU90xxx-14-00-00-xx-010
Operating options
• via the display and operating module at the Prosonic S
• via the service interface with the Commubox FXA291 and the operating program "ToF Tool - FieldTool
Package" or "FieldCare"
• via PROFIBUS DP with Profiboard or Proficard and the operating program "ToF Fool - FieldTool Package" or
"FieldCare"
DXR375
SPS / PLC / API
Commubox
FXA191 (RS232)
FXA195 (USB)
ToF Tool
FieldTool
Package
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
-
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
-
DELTABAR:** * * * * * *
ONLINE
1 QUICK SETUP
2 OPERATING MENU
4 SV 0°C
3 PV 352mbar
HELP SAVE
dsdmdm
dfdas.
asdasfa
asasla.
ToF Tool
FieldTool
Package
Prosonic S
Commubox
FXA 291
Field
Care Field
Care
I : 4 … 20 mA + HART
1
PROFIBUS DP
ToF Tool
FieldTool
Package
SPS /
PLC/
API
Ethernet
PDM
...
Prosonic S
PROFIboard
PROFIcard
PROFIusb
ToF Tool
FieldTool
Package Commubox
FXA 291
Field
Care
Field
Care
T
T

Prosonic S FMU90
8Endress + Hauser
Input
Sensor inputs Depending on the instrument version, 1 or 2 of the sensors FDU91, FDU91F, FDU92, FDU93, FDU95 and
FDU96 can be connected. The Prosonic S identifies these sensors automatically.
In order to support existing installations, the sensors of the former series FDU8x can be connected as well. The
type of sensor must be entered manually.
#Warning!
The sensors FDU83, FDU84, FDU85 and FDU86 with an ATEX, FM or CSA certificate are not certified for
connection to the transmitter FMU90.
External limit switches
(option)
Optionally, the Prosonic S FMU90 has four inputs for external limit switches (FMU90-********B***).
Switching options
• external passive limit switch (NC/NO switch)
• 0: < 8 V; 1: > 16 V
Usage (examples)
• pump feedback (for FMU90-*3******B***) and FMU90-*4******B***)
• pump tariff control (for FMU90-*3******B***) and FMU90-*4******B***)
• start/stop/reset of daily counters (for flow measurements)
(for FMU90-*2******B*** and FMU90-*4******B***)
• min/max level detection, e.g. by Liquiphant
External temperature sensor Optionally, the Prosonic S FMU90 has an input for an external temperature sensor (FMU90-********B***).
Connectable sensors
• Pt100 (3-wire or 4-wire connection)
A Pt100 with 2-wire connection may not be used due to its insufficient accuracy.
• FMT131(from Endress+Hauser, see chapter "Accessories")
Usage (example)
• Time-of-flight correction for a heated sensor (FDU91-***B*).
Sensor FDU91
FDU91F FDU92 FDU93 FDU95 FDU96
max. range1) in liquids
1) This table gives the maximum range. The range depends on the measuring conditions. For an estimation see
Technical Information TI 396F, chapter "Input".
10 m 20 m 25 m - -
max. range1in solids 5 m 10 m 15 m 45 m 70 m
Sensor FDU80
FDU80F
FDU81
FDU81F FDU82 FDU83 FDU84 FDU85 FDU86
max. range1) in liquids
1) This table gives the maximum range. The range depends on the measuring conditions. For an estimation see
Technical Information TI 189F, chapter "Planning Recommendations".
5 m 9 m 20 m 25 m - - -
max. range1in solids 2 m 5 m 10 m 15 m 25 m 45 m 70 m

Prosonic S FMU90
Endress + Hauser 9
Output
Analogue outputs
Relay outputs
Number 1 or 2, depending on instrument version
Output signal configurable at the instrument:
• 4 ... 20 mA with HART1)
• 0 ... 20 mA without HART
1) The HART signal is assigned to the first analogue output. The second analogue output does not carry a HART signal.
Signal on alarm • for setting 4 ... 20 mA, selectable:
– -10% (3,6 mA)
– 110% (22 mA)
– HOLD (last current value is held)
– user specific
• for setting 0 ... 20 mA:
– 110% (21,6 mA)
– HOLD (last current value is held)
– user specific
Output damping freely selectable, 0 ... 1000 s
Load max. 600 Ω, influence negligible
max. ripple USS = 200 mV at 47 ... 125 Hz (measured at 500Ω)
max. noise Ueff = 2,2 mV at 500 Hz... 10 kHz (measured at 500Ω)
Number 1, 3 or 6; depending on the instrument version
Type potential-free relay, SPDT, can be inverted
Assignable functions • limit (inband, out-of-band, trend, level limit)
• counting pulse1(pulse width adjustable)
• time pulse1(pulse width adjustable)
• alarm/diagnosis
(e.g. indication of backwater1), sludge1, echo loss etc.)
• pump control (alternating/fixed limit/pump rate)
• for FMU90-*3********** and FMU90-*4**********):
additional pump control (standby pump, storm function to avoid unnecessary run
times of the pumps, pump function test, flush control to clean pump shafts, operating
hours alarm, pump alarm)
• rake control (difference or relative measurement)
• fieldbus relay (to be switched direclty from the Profibus DP-bus)
1) for instrument versions with flow software (FMU90 - *2**********)
Switching power • DC voltage: 35 VDC, 100 W
• AC voltage: 4 A, 250 V, 100 VA at cosϕ= 0,7
State on error selectable:
• HOLD (last value is held)
• energized
• de-energized
• present value is used
Behaviour after power failure switch-on delay selectable
LEDs2)
2) for instrument versions with display and operating module
A yellow LED on the front panel is allocated to each relay, which lights if the relay is
energized.
The LED of an alarm relay lights during normal operation.
The LED for a pulse relay briefly flashes at every pulse.

Prosonic S FMU90
10 Endress + Hauser
PROFIBUS DP interface
Auxiliary energy
Supply voltage/
Power consumption/
Current consumption
Galvanic isolation The following terminals are galvanically isolated from each other:
• auxiliary energy
•sensorinputs
• analogue output 1
• analogue output 2
• relay outputs
• bus connection (PROFIBUS DP)
Fuse •2AT/DC
• 400 mA T /AC
accesible in the terminal compartment
Profile 3.0
Transmittable values • main value (level or flow, depending on the instrument version)
•distances
•counters
• temperatures
• average/difference/sum
• relay states
•rakecontrol
• pump control
Function blocks • 10 Analog Input Blocks (AI)
• 10 Digital Input Blocks (DI)
• 10 Digital Output Blocks (DO)
Supported baud rates • 9.6 kbaud
• 19.2 kbaud
• 45,45 kbuad
• 93.75 kbaud
• 187.5 kbaud
• 500 kbaud
• 1.5 Mbaud
•3Mbaud
•6Mbaud
•12Mbaud
Service Access Points (SAPs) 1
ID number 1540 (hex) 1540 (hex) = 5440 (dec)
GSD file EH3x1540.gsd
Addressing via dip switches at the instrument or via software (e.g. FieldCare)
Default address: 126 per software
Termination can be activated/deactivated in the instrument
Locking The device can be locked by hardware or software.
Instrument version Supply voltage Power consumption Current consumption
AC voltage
(FMU90 - ****A****) 90 ... 253 VAC (50/60 Hz) max. 23 VA max. 100 mA at 230 VAC
DC voltage
(FMU90 - ****B****) 10,5 ... 32 VDC max. 14 W (typically 8 W) max. 580 mA at 24 VDC

Prosonic S FMU90
Endress + Hauser 11
Electrical connection
Terminal compartment of the
field housing
The field housing has a separate terminal compartment. It can be opened after loosening the four screws of the
lid.
L00-FMU90xxx-04-00-00-xx-002
For easier wiring, the lid can be completely removed by unplugging the display plug (1) and pulling off the
hinges (2):
L00-FMU90xxx-04-00-00-xx-009
Cable entries of the field
housing
On the bottom of the housing the following openings for cable entries are prestamped:
• M20x1,5 (10 openings)
• M16x1,5 (5 openings)
• M25x1,5 (1 opening)
A suitable cutting device must be used for cutting out the openings.
1
2
1
1
1
3
12

Prosonic S FMU90
12 Endress + Hauser
Terminal compartment of the
DIN-rail housing
Single instrument
l00-fmu90xxx-04-00-00-xx-003
The catch can be unlocked by slightly pressing onto the clip. Then, the cover of the terminal compartment can
be opened.
Several instruments mounted side by side
L00-FMU90xxx-04-00-00-xx-012
1. Open the catch of the cover (e.g. by a screwdriver).
2. Pull the cover out by approx. 2 cm.
3. The cover can now be opened.
!Note!
• The cables can be inserted into the housing from above or from below.
• The pictures show the smallest housing version but are valid for the larger versions as well.
• If the instruments are mounted next to each other and if the sensor cables run in parallel, the synchronization
terminals (39 and 40) must be interconnected (see sections "Terminal assignment" and Synchronization
line").
12
a
b
12
3

Prosonic S FMU90
Endress + Hauser 13
Terminal assignment Pluggable spring-force terminals for connection of the cables are supplied in the terminal compartment. Rigid
conductors or flexible conductors with cable sleeve can directly be inserted and are contacted automatically.
The terminal configuration depends on the instrument version ordered. There is a basic terminal area, which
is present in every instrument version. Additonal optional terminal areas are only present if the respective
option has been selected in the product structure.
L00-FMU90xxx-04-00-00-xx-001
Terminals of the Prosonic S; the terminals depicted in grey are not present in every instrument version.
A: Basic terminal area; B-E: Optional terminal areas (present if the respective option has been selected in the product
structure)
!Note!
The depicted switching states of the relays refer to the de-energized state.
Conductor cross section 0,2 mm2- 2,5 mm2
Cable and sleeve cross section 0,25 mm2- 2,5 mm2
min. stripping length 10 mm
Terminal area present for the following instrument versions
Basic area A for all versions
Optional areas
Bfor instrument versions with 2 sensor inputs and/or 2 analogue outputs
(FMU90 - *****2****** and/or FMU90 - *******2****)
Cfor instrument versions with 3 or 6 relays
(FMU90 - ******3***** oder FMU90 - ******6*****)
Dfor instruments with external switch inputs and external temperature input
(FMU90 - ********B***)
Efor instrument versions with PROFIBUS DP interface
(FMU90 - *******3****)
FDU-
Sensor
0/4...20mA
1
42
41
Relay
5552545153
50
3
Address
Term.
DP
off
on
off
on
SW
HW
1
2
3
4
5
6
7
8
1
2
3
4
A(N)
66
B(P)
65
Display
POWER
HART
0/4…20mA
Sync
Fuse
I1FDU-
Sensor
RD
11
BK
10
YE
9
40
39
5
4
67
8
11
Service
Relay
321
AB C E
2
58
5756
4
61
61
60
59
59
5
64
63
62
62
6
RD
11
BK
10
YE
9
2
RD
14
BK
13
YE
12
I
2
FDU-
Sensor
DigIn
76
73 757274
71
2
D
1
79
79
7877
3
82
81
80
4
85
8483
Temp.

Prosonic S FMU90
14 Endress + Hauser
Terminals Meaning Terminal area Remarks
Auxiliary energy
1, 2 • L (für AC version)
•L+(forDCversion) Adepending on instrument version:
• 90 ... 253 VAC
• 10,5 ... 32 VDC
2•N(forACversion)
•L-(forDCversion)
A
3 Potential equalization A
Fuse A depending on instrument version:
• 400 mA T (for AC)
•2AT(forDC)
Analog outputs (not available for Profibus DP instruments)
4, 5
Analog output 1;
4 ... 20 mA with HART/
0 ... 20 mA w/o HART
Anot present for the PROFIBUS DP version
41, 42
Analog output 2 (optional);
4 ... 20 mA/
0 ... 20 mA
Bonly for the version with two analog outputs;
no HART signal at this output
Relay outputs
6, 7, 8 Relay 1 A
50, 51, 52 Relay 2 (optional) C only for the versions with 3 or 6 relays
53, 54, 55 Relay 3 (optional) C only for the versions with 3 or 6 relays
56, 57, 58 Relay 4 (optional) C only for the version with 6 relays
59, 60, 61 Relay 5 (optional) C only for the version with 6 relays
62, 63, 64 Relay 6 (optional) C only for the version with 6 relays
Bus communication (only available for Profibus DP instruments)
65 PROFIBUS A (RxT/TxD - N) D
only for the PROFIBUS DP version
66 PROFIBUS B (RxT/TxD - P) D
Synchronization
39, 40 Synchronization A see section 4.6, "Synchronization line"
Level inputs
9 (YE),
10 (BK),
11 (RD)
Sensor 1 (FDU8x/9x)
YE: yellow strand
BK: black strand
RD: red strand
• A: for versions with 1 sensor input
• B: for versions with 2 sensor inputs1)
12 (YE),
13 (BK),
14 (RD)
Sensor 2 (FDU8x/9x) (optional)
YE: yellow strand
BK: black strand
RD: red strand
B only for the version with 2 sensor inputs
external switch inputs
71, 72, 73 external switch input 1 D 0: < 8 V or 72 and 73 interconnected
1: > 16 V or 72 and 73 not interconnected
74, 75, 76 external switch input 2 D 0: < 8 V or 75 and 76 interconnected
1: > 16 V or 75 and 76 not interconnected
77, 78, 79 external switch input 3 D 0: < 8 V or 78 and 79 interconnected
1: > 16 V or 78 and 79 not interconnected
80, 81, 82 external switch input 4 D 0: < 8 V or 81 and 82 interconnected
1: > 16 V or 81 and 82 not interconnected
temperature input
83, 84, 85 temperature input:
•PT100
• FMT131 (Endress+Hauser)
D see section
"Connection of a temperature sensor"

Prosonic S FMU90
Endress + Hauser 15
#Warning!
When using the public supply mains, an easily accesible power switch must be installed in the proximity of the
device. The power switch must be marked as a disconnector for the device (IEC/EN 61010)
!Note!
• In order to avoid interference signals, the sensor cables should not be laid parallel to high voltage or electric
power lines.
• The cables may not be laid in the proximity to frequnecy converters.
Additional elements on the terminal areas
Terminals Pluggable spring-force terminals for connection of the cables are supplied in the terminal compartment. Rigid
conductors or flexible conductors with cable and sleeve can directly be inserted and are contacted
automatically.
1) In this case, terminals 9/10/11 are not present on terminal area A.
Designation Meaning/Remarks
Fuse Fuse: 2 A T /DC or 400 mA T/AC
Display Connection of the display or the remote display and operating module
Service Service interface for connection of a PC/Notebook via Commubox FXA291
Locking switch
Term. Bus termination (only applicable for instruments with PROFIBUS interface)
Address Bus address (only applicable for instruments with PROFIBUS interface)
Conductor cross section 0,2 mm2- 2,5 mm2
Cable and sleeve cross section 0,25 mm2- 2,5 mm2
min. stripping length 10 mm

Prosonic S FMU90
16 Endress + Hauser
Connection of the sensors
FDU9x
L00-FDU9xxxx-04-00-00-xx-002
(A): Terminal box (recommended or cable lengths > 30 m); (B): Grounding at the terminal box; (C): Grounding at the
transmitter or in the control room; (1): Terminals for sensor input 1 at the FMU9x; (2): Terminals for sensor input 2 at
the FMU9x (optional)
For details refer to Technical Information TI 396F.
YE
9
(12)
BK
10
(13)
RD
11
(14)
FDU91/92
(FDU80/80F/81/81F/82)
BK
YE RD
(1)
YE
9
(12)
BK
10
(13)
RD
11
(14)
FDU91F/93/95/96
(FDU83/84/85/86)
BK
YE RD GNYE
(2)
(3)
FMU90
(1)
(2)
(3)
FMU90
YE
9
(12)
BK
10
(13)
RD
11
(14)
FDU91
(FDU80/81)
BK
YE RD
(1)
(2)
(3)
FMU90
BN BU
24 VDC
+-
(A) (B)
(C)
max.
300 m
YE
9
(12)
BK
10
(13)
RD
11
(14)
FDU91F/93/95/96
(FDU83/84/85/86)
BK
YE RD GNYE
(1)
FMU90
(D)
max.
30 m
max.
300 m
max.
30 m
FDU91/92
(FDU80/80F/81/81F/82)
FDU91F/93/95/96
(FDU83/84/85/86)

Prosonic S FMU90
Endress + Hauser 17
Synchronization line
Connection of the separate
display and operating module
L00-FMU90xxx-04-00-00-xx-005
For the version of the Prosonic S with a separate display for panel mounting, a pre-assembled connecting cable
(3 m) is supplied. The cable must be connected to the display plug of the Prosonic S.
!Note!
Minimum diameter for cable bushing: 2 cm
• If wiring several Prosonic S (FMU90/FMU95)
which are mounted in a common cabinet and if the
sensor cables run in parallel, the synchronization
terminals (39 and 40) must be interconnected.
• Up to 20 instruments can be synchronized in this
way.
• If there are more than 20 instruments, groups must
be formed, each containing a maximum of 20
instruments. For the instruments within each
group, the sensor cables may run in parallel. The
sensor cables of different groups must be seperated
from each other.
• Usual commercial screened cable can be used for
synchronization
– max. length: 10 m between the individual
instruments
– cross section: 2 x (0.75 - 2.5 mm2)
– for lengths up to 1 m, an unscreened cable can
be used; for lenghts exceeding 1 m, screening is
required. The screen must be connected to
ground
• Instruments of the Prosonic FMU86x family can be
connected to the synchronization line as well. In
this case a maximum of 10 instruments can be
connected to each synchronisation line.
L00-FMU90xxx-04-00-00-xx-004
L00-FMU90xxx-04-00-00-xx-017
Prosonic S
FMU90/95
39 40
123 20
……
FMU90FMU90FMU90
Prosonic S
FMU90/95
39 40
Prosonic S
FMU90/95
39 40
Prosonic S
FMU90/95
39 40
Prosonic
FMU860/861/862
63 64
1210
……
FMU90
VH
Display
POWER
HART
0/4…20mA
Sync
Fuse
I
1
FDU-
Sensor
RD
11
BK
10
YE
9
40
39
5
4
6
7
8
11
Service
Relay
3
2
1
3 m

Prosonic S FMU90
18 Endress + Hauser
Connection of external swit-
ches
(for FMU90-********B***)
L00-FMU90xxx-04-00-00-xx-021
The maximum short-circuit current at 24 V is 20 mA.
ABC
PNP
24 V
ABC
24 V
FMU90 FMU90
A: 71, 74, 77, 80
B: 72, 75, 78, 81
C: 73
,
76
,
79
,
82
FTL
AB

Prosonic S FMU90
Endress + Hauser 19
Connection of a temperature
sensor
FMT131 (Endress+Hauser)
(connectable to FMU90-********B***)
L00-FMU90xxx-04-00-00-xx-019
A: Non-Ex area (FMT131-R); B: Ex area (FMT131-J) with grounding in the FMU90;
C: Ex area (FMT131-J) with crounding at a terminal box
BK: black; YE: yellow; YEGN: yellow-green
!Note!
For details refer to the Operating Instructions KA019F.
Pt100
(connectable to FMU90-********B***)
L00-FMU90xxx-04-00-00-xx-020
A: Pt100 with 3-wire connection; B: Pt100 with 4-wire connection (one connector remains unused)
!Note!
A Pt100 with 2-wire connection may not be used due to its insufficient measuring accuracy.
#Warning!
A Pt100 may not be connected in explosion hazardous areas. A FMT131 must be used instead.
83 84
BK YE
FMU90
85
YEGN
EX
EX
FMT131-J EX
EX
83 84
BK
BK
YE
YE
YEGN
FMT131-J
FMU90
85
EX
EX
83 84
BK
BK
YE
YE
YEGN
FMT131-R
FMU90
85
A
C
B
83 84
FMU90
85
A
Pt100
83 84
FMU90
85
Pt100
B

Prosonic S FMU90
20 Endress + Hauser
Performance characteristics
Reference operating
conditions
• Temperature = 24±5 °C
• Pressure = 960±100 mbar
• Relative humidity = 60±15 %
• Ideally reflecting surface, sensor vertically aligned
(e.g. calm, plane liquid surface of 1 m2)
• No interference echoes within the signal beam
• Settings of the application parameters:
– tank shape = flat ceiling
– medium property = liquid
– process condition = calm surface
Measuring uncertainty5) ±0,2 % of the maximum span of the sensor
Typical accuracy6) ±2 mm + 0,17 % of the measured distance
Measured value resolution 1mmwithFDU91
Measuring frequency max. 3 Hz
The exact value depends on the settings of the application parameters and the instrument version.
!Note!
The maximum measuring frequency is obtained for "empty E" ≤2 m and "process condition" = "test: no filter".
Ambient conditions
Ambient temperature -40 ... 60 °C
The functionality of the LC display becomes restricted at TU< -20 °C.
If the device is operated outdoors in strong sunlight, a protective cover should be used (s. chapter
"Accessories").
Storage temperature -40 ... 60 °C
Climate class •Field housing: according to DIN EN 60721-3 4K2/4K5/4K6/4Z2/4Z5/4C3/4S4/4M2
(DIN 60721-3 4K2 corresponds to DIN 60654-1 D1)
•Housing for DIN rail mounting: according to
DIN EN 60721-3 3K3/3Z2/3Z5/3B1/3C2/3S3/3M1
(DIN 60721-3 3K3 corresponds to DIN 60654-1 B2)
Vibration resistance • Housing for DIN rail: DIN EN 600068-2-64 / IEC 68-2-64; 20 ... 2000 Hz; 0,5 (m/s2)2/Hz
• Field housing: DIN EN 600068-2-64 / IEC 68-2-64; 20 ... 2000 Hz; 1,0 (m/s2)2/Hz
Ingress protection • Field housing: IP66 / NEMA 4x
• Housing for DIN rail: IP20
• separate display:
– IP65 / NEMA 4 (front panel , if mounted in cabinet door)
– IP20 (rear panel, if mounted in cabinet door)
Electromagnetic compatibility
(EMC)
• Interference emmission to EN 61326; Equipment class A
• Interference immunity to EN 61326; Annex A (Industrial) and NAMUR recommendation EMC (NE21)
5) according to NAMUR EN 61298-2
6) after calibration