Endress+Hauser Micropilot FMR51 Manual

Level measurement in liquids
Application
• Continuous, non-contact level measurement of liquids, pastes and slurries
• Horn antenna (FMR51); flush mounted, completely filled PTFE horn antenna
(FMR52)
• Maximum measuring range: 70 m (230 ft)
• Temperature: –196 to +450 °C (–321 to +842 °F)
• Pressure: –1 to +160 bar (–14.5 to +2 320 psi)
• Accuracy: ± 2 mm
• International explosion protection certificates; WHG; marine approvals
• Linearity protocol (3-point, 5-point)
Your benefits
• Reliable measurement even for changing product and process conditions
• HistoROM data management for easy commissioning, maintenance and
diagnostics
• Highest reliability due to Multi-Echo Tracking
• SIL2 according to IEC 61508, SIL3 in case of homogeneous or heterogeneous
redundancy
• Seamless integration into control or asset management systems
• Intuitive user interface in national languages
• Easy proof test for SIL and WHG
• Heartbeat Technology™
Products Solutions Services
Technical Information
Micropilot FMR51, FMR52
Free space radar
TI01040F/00/EN/08.17
71375707

Micropilot FMR51, FMR52
2 Endress+Hauser
Table of contents
Important document information ............... 4
Symbols .................................... 4
Function and system design ................... 6
Measuring principle ............................ 6
Input ..................................... 8
Measured variable ............................. 8
Measuring range .............................. 8
Operating frequency .......................... 13
Transmitting power ........................... 13
Output .................................. 14
Output signal ............................... 14
Signal on alarm .............................. 15
Linearization ............................... 15
Galvanic isolation ............................ 15
Protocol-specific data .......................... 15
Power supply ............................. 20
Terminal assignment .......................... 20
Device plug connectors ......................... 27
Supply voltage .............................. 28
Power consumption ........................... 30
Current consumption .......................... 30
Power supply failure .......................... 31
Potential equalization ......................... 31
Terminals ................................. 31
Cable entries ............................... 31
Cable specification ............................ 31
Overvoltage protection ......................... 32
Performance characteristics .................. 33
Reference operating conditions ................... 33
Maximum measured error ....................... 33
Measured value resolution ...................... 34
Reaction time ............................... 34
Influence of ambient temperature ................. 34
Influence of gas layer .......................... 34
Gas phase compensation with external pressure sensor
(PROFIBUS PA, FOUNDATION Fieldbus) ............. 35
Installation ............................... 36
Installation conditions ......................... 36
Measuring conditions .......................... 40
Mounting cladded flanges ....................... 41
Installation in vessel (free space) .................. 41
Installation in stilling well ....................... 45
Installation in bypass .......................... 47
Vessels with heat insulation ..................... 49
Environment .............................. 50
Ambient temperature range ..................... 50
Ambient temperature limits ..................... 50
Storage temperature .......................... 58
Climate class ............................... 58
Altitude according to IEC61010-1 Ed.3 .............. 58
Degree of protection .......................... 58
Vibration resistance ........................... 58
Cleaning the antenna .......................... 58
Electromagnetic compatibility (EMC) ............... 59
Process .................................. 60
Process temperature, Process pressure .............. 60
Dielectric constant ............................ 62
Mechanical construction .................... 63
Dimensions ................................ 63
Weight ................................... 73
Materials: GT18 housing (stainless steel, corrosion-
resistant) .................................. 74
Materials: GT19 housing (plastic) .................. 75
Materials: GT20 housing (die-cast aluminum, powder-
coated) ................................... 76
Materials: Antenna and process connection ........... 77
Materials: Weather protection cover ................ 79
Operability ............................... 80
Operating concept ............................ 80
Local operation .............................. 81
Operation with remote display and operating module
FHX50 ................................... 81
Remote operation ............................ 82
Integration in tank gauging system ................. 85
SupplyCare inventory management software .......... 86
Certificates and approvals ................... 89
CE mark ................................... 89
RoHS ..................................... 89
RCM-Tick marking ............................ 89
Ex approval ................................ 89
Dual seal according to ANSI/ISA 12.27.01 ............ 89
Functional Safety ............................ 89
WHG ..................................... 89
Sanitary compatibility ......................... 89
NACE MR 0175 / ISO 15156 ..................... 90
NACE MR 0103 ............................. 90
Pressure equipment with allowable pressure
≤ 200 bar (2 900 psi) .......................... 90
Marine certificate ............................ 90
Radio standard EN302729-1/2 ................... 90
Radio standard EN302372-1/2 ................... 91
FCC / Industry Canada ......................... 91
Japanese radio approval ........................ 92
CRN approval ............................... 92
Track record ................................ 93
Test, Certificate .............................. 94
Product documentation on paper .................. 94
Other standards and guidelines ................... 95
Ordering information ....................... 96
Ordering information .......................... 96
3-point linearity protocol ....................... 97
5-point linearity protocol ....................... 98
Customized parametrization ..................... 99

Micropilot FMR51, FMR52
Endress+Hauser 3
Tagging (TAG) .............................. 99
Services ................................... 99
Application Packages ...................... 100
Heartbeat Diagnostics ........................ 100
Heartbeat Verification ........................ 101
Heartbeat Monitoring ......................... 102
Accessories .............................. 103
Device-specific accessories ...................... 103
Communication-specific accessories ............... 108
Service-specific accessories ..................... 109
System components .......................... 109
Documentation ........................... 110
Standard documentation ....................... 110
Supplementary documentation ................... 110
Safety Instructions (XA) ....................... 110
Registered trademarks ..................... 113
Patents ................................. 113

Micropilot FMR51, FMR52
4 Endress+Hauser
Important document information
Symbols Safety symbols
Symbol Meaning
DANGER
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will
result in serious or fatal injury.
WARNING
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can
result in serious or fatal injury.
CAUTION
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can
result in minor or medium injury.
NOTICE
NOTE!
This symbol contains information on procedures and other facts which do not result in
personal injury.
Electrical symbols
Symbol Meaning
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a
grounding system.
Protective Earth (PE)
A terminal which must be connected to ground prior to establishing any other
connections.
The ground terminals are situated inside and outside the device:
• Inner ground terminal: Connects the protectiv earth to the mains supply.
• Outer ground terminal: Connects the device to the plant grounding system.
Symbols for certain types of information
Symbol Meaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation.
A
Reference to page.
Reference to graphic.
Visual inspection.

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Symbols in graphics
Symbol Meaning
1, 2, 3 ... Item numbers
1.
,
2.
,
3.
… Series of steps
A, B, C, ... Views
A-A, B-B, C-C, ... Sections
-
Hazardous area
Indicates a hazardous area.
.
Safe area (non-hazardous area)
Indicates the non-hazardous area.
Symbols at the device
Symbol Meaning
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions.
Temperature resistance of the connection cables
Specifies the minimum value of the temperature resistance of the connection cables.

Micropilot FMR51, FMR52
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Function and system design
Measuring principle The Micropilot is a "downward-looking" measuring system, operating based on the time-of-flight
method (ToF). It measures the distance from the reference point (process connection) to the product
surface. Radar impulses are emitted by an antenna, reflected off the product surface and received
again by the radar system.
F
L
D
E
R
0%
100%
A0017871
 1 Setup parameters of the Micropilot
R Reference point of the measurement (lower edge of the flange or threaded connection)
E Empty calibration ( = zero)
F Full calibration (= span)
D Measured distance
L Level (L = E - D)
Input
The reflected radar impulses are received by the antenna and transmitted into the electronics. A
microprocessor evaluates the signal and identifies the level echo caused by the reflection of the radar
impulse at the product surface. The unambiguous signal identification is accomplished by the
PulseMaster® eXact software together with the Multi-echo tracking algorithms, based on many
years of experience with time-of-flight technology.
The distance D to the product surface is proportional to the time of flight t of the impulse:
D = c · t/2,
with c being the speed of light.
Based on the known empty distance E, the level L is calculated:
L = E – D
The reference point R of the measurement is located at the process connection. For details see the
dimensional drawing:
• FMR51: →  64
• FMR52: →  70
The Micropilot is equipped with functions to suppress interference echoes. The user can activate
these functions. Together with the multi-echo tracking algorithms they ensure that interference
echoes (i.e. from edges and weld seams) are not interpreted as level echo.

Micropilot FMR51, FMR52
Endress+Hauser 7
Output
The Micropilot is commissioned by entering an empty distance "E" (=zero), a full distance "F" (=span)
and application parameters which automatically adapt the instrument to the process conditions. For
models with a current output, the factory adjustment for zero point "E" and span "F" is 4 mA and 20
mA. For digital outputs and the display module, the factory adjustment for zero point "E" and span "F"
is 0 % and 100 %.
A linearization with max. 32 points, based on a table entered either manually or semi-automatically,
can be activated locally or remotely. This function provides a measurement in engineering units and
a linear output signal for spheres, horizontal cylindrical tanks and vessels with conical outlet.
Life cycle of the product
Engineering
• Universal measuring principle
• Measurement unaffected by medium properties
• Hardware and software developed according to SIL IEC 61508
Procurement
• Endress+Hauser being the world market leader in level measurement guarantees asset protection
• Worldwide support and service
Installation
• Special tools are not required
• Reverse polarity protection
• Modern, detachable terminals
• Main electronics protected by a separate connection compartment
Commissioning
• Fast, menu-guided commissioning in only a few steps on site or from the control room
• Plain text display in national languages reduces the risk of error or confusion
• Direct local access of all parameters
• Short instruction manual at the device
Operation
• Multi-echo tracking: Reliable measurement through self-learning echo-search algorithms taking
into account the short-term and long-term history in order to check the found echoes for
plausibility and to suppress interference echoes.
• Diagnostics in accordance with NAMUR NE107
Maintenance
• HistoROM: Data backup for instrument settings and measured values
• Exact instrument and process diagnosis to assist fast decisions with clear details concerning
remedies
• Intuitive, menu-guided operating concept in national languages saves costs for training,
maintenance and operation
• Cover of the electronics compartment can be opened in hazardous areas
Retirement
• Order code translation for subsequent models
• RoHS-conforming (Restriction of certain Hazardous Substances), unleaded soldering of electronic
components
• Environmentally sound recycling concept

Micropilot FMR51, FMR52
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Input
Measured variable The measured variable is the distance between the reference point and the product surface.
The level is calculated from this distance, taking into account the empty distance "E" entered by the
user.
If required, the level can be converted into other variables (volume, mass) by means of a linearization
(up to 32 points).
Measuring range Maximum measuring range
Device Maximum measuring range
FMR51 - standard version 40 m (131 ft)
FMR51 - with "Advanced dynamics" application package 70 m (230 ft)
FMR52 - standard version 40 m (131 ft)
FMR52 - with "Advanced dynamics" application package 60 m (197 ft)
Usable measuring range
The usable measuring range depends on the size of the antenna, the reflectivity of the medium, the
mounting location and eventual interference reflections.
The following tables describe the groups of media as well as the achievable measuring range as a
function of application and media group. If the dielectric constant of a medium is unknown, it is
recommended to assume media group B to ensure a reliable measurement.
Media groups
Media groups DC (εr) Example
A1.4 to 1.9 non-conducting liquids, e.g. liquefied gas 1)
B1.9 to 4 non-conducting liquids, e.g. benzene, oil, toluene, …
C4 to 10 e.g. concentrated acids, organic solvents, esters, aniline, alcohol, acetone, …
D> 10 conducting liquids, e.g. aqueous solutions, dilute acids and alkalis
1) Treat Ammonia NH3 as a medium of group A.
For dielectric constants (DC values) of many media commonly used in various industries refer
to:
• the Endress+Hauser DC manual (CP01076F)
• the Endress+Hauser "DC Values App" (available for Android and iOS)

Micropilot FMR51, FMR52
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Device Storage tank
A0018833
Calm product surface (e.g. intermittent filling, filling from bottom, immersion tubes)
Antenna size
FMR51 40 mm (1½ in) 50 mm (2 in) 80 mm (3 in) 100 mm (4 in)
FMR52 - 50 mm (2 in) 80 mm (3 in) -
A B
25
(82)
15
(49)
C D
3
(9.9)
10
(32)
15
(49)
5
(16)
8
(26)
5
(16)
A0018858
A B C D
4
(13)
8
(26)
8
(26)
15
(49)
12
(39)
25
(82)
35
(110)
40
(131)
A0018859
A B C D
8
(26)
15
(49)
30
(98)
40
(131)
10
(32)
20
(65)
40
(131)
60
(197)
A0018860
A B C D
10
(32)
25
(82)
40
(131)
40
(131)
15
(49)
30
(99)
45
(148)
70
(229)
A0018862
Measuring range [m (ft)]
Legend
Measuring range of the standard version
Measuring range for the "Advanced dynamics" application package (product structure: feature 540:
"Application Package", Option EM: "Advanced dynamics")

Micropilot FMR51, FMR52
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Device Buffer tank
A0018835
Moving surfaces (e.g. continuous filling, from above, mixing jets)
Antenna size
FMR51 40 mm (1½ in) 50 mm (2 in) 80 mm (3 in) 100 mm (4 in)
FMR52 - 50 mm (2 in) 80 mm (3 in) -
B C D
(6.6)
4
(13)
7.5
(24)
10
(32)
(16)
5
2
A0018863
BB CC DD
3
(9.9)
7.5
(24)
10
(32)
5
(16)
10
(32)
15
(49)
A0018864
A B C D
2.5
(8)
5
(16)
10
(32)
15
(49)
5
(16)
10
(32)
15
(49)
25
(82)
A0018865
A B C D
5
(16)
10
(32)
15
(49)
25
(82)
7.5
(24)
15
(49)
25
(82)
35
(110)
A0018866
Measuring range [m (ft)]
Legend
Measuring range of the standard version
Measuring range for the "Advanced dynamics" application package (product structure: feature 540:
"Application Package", Option EM: "Advanced dynamics")

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Device Process tank with agitator
A0018837
Turbulent surface (e.g. filling from above, agitators, baffles)
Antenna size
FMR51 40 mm (1½ in) 50 mm (2 in) 80 mm (3 in) 100 mm (4 in)
FMR52 - 50 mm (2 in) 80 mm (3 in) -
B C D
1
(3.2)
2
(6.6)
3
(9.8)
5
(16)
A0018867
B C D
2
(6.6)
3
(9.8)
5
(16)
7.5
(25)
10
(32)
A0018868
B C D
2.5
(8.2)
5
(16)
12
(39)
15
(49)
8
(26)
A0018869
B C D
4
(13)
(16)
5
8
(26)
15
(49)
20
(65)
10
(32)
A0018870
Measuring range [m (ft)]
Legend
Measuring range of the standard version
Measuring range for the "Advanced dynamics" application package (product structure: feature 540:
"Application Package", Option EM: "Advanced dynamics")

Micropilot FMR51, FMR52
12 Endress+Hauser
Device Stilling well Bypass
A0018842
A0018840
Antenna size Antenna size
FMR51 40 ... 100 mm ( 1½ ... 4 in) 40 ... 100 mm ( 1½ ... 4 in)
FMR52 50 ... 80 mm ( 2 ... 3 in) 50 ... 80 mm ( 2 ... 3 in)
20
(66)
A, B, C, D
A0018851
20
(66)
C, D
A0018852
Measuring range [m (ft)]

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Operating frequency K-band (~ 26 GHz)
Up to 8 Micropilot transmitters can be installed in the same tank because the transmitter pulses are
statistically coded.
Transmitting power Distance Average energy density in beam direction
Standard version With "Advanced dynamics" application
package 1)
1 m (3.3 ft) < 12 nW/cm2< 64 nW/cm2
5 m (16 ft) < 0.4 nW/cm2< 2.5 nW/cm2
1) Product structure, feature 540: "Application package", option EM: "Advanced dynamics"

Micropilot FMR51, FMR52
14 Endress+Hauser
Output
Output signal HART
Signal coding FSK ±0.5 mA over current signal
Data transmission rate 1 200 Bit/s
Galvanic isolation Yes
PROFIBUS PA
Signal coding Manchester Bus Powered (MBP)
Data transmission rate 31.25 kBit/s, voltage mode
Galvanic isolation Yes
FOUNDATION Fieldbus
Signal coding Manchester Bus Powered (MBP)
Data transmission rate 31.25 kBit/s, voltage mode
Galvanic isolation Yes
Switch output
For HART devices, the switch output is available as an option. See product structure, feature 20:
"Power Supply, Output", option B: "2-wire; 4-20mA HART, switch output"
Devices with PROFIBUS PA and FOUNDATION Fieldbus always have a switch output.
Switch output
Function Open collector switching output
Switching behavior Binary (conductive or non-conductive), switches when the programmable switch
point is reached
Failure mode non-conductive
Electrical connection values U = 16 to 35 VDC, I = 0 to 40 mA
Internal resistance RI < 880 Ω
The voltage drop at this internal resistance has to be taken into account on
planning the configuration. For example, the resulting voltage at a connected
relay must be sufficient to switch the relay.
Insulation voltage floating, Insulation voltage 1 350 VDC to power supply aund 500 VAC to ground
Switch point freely programmable, separately for switch-on and switch-off point
Switching delay freely programmable from 0 to 100 s, separately for switch-on and switch-off
point
Number of switching cycles corresponds to the measuring cycle
Signal source
device variables
• Level linearized
• Distance
• Terminal voltage
• Electronic temperature
• Relative echo amplitude
• Diagnostic values, Advanced diagnostics
Number of switching cycles unlimited

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Signal on alarm Depending on the interface, failure information is displayed as follows:
• Current output (for HART devices)
– Failsafe mode selectable (in accordance with NAMUR Recommendation NE 43):
Minimum alarm: 3.6 mA
Maximum alarm (= factory setting): 22 mA
– Failsafe mode with user-selectable value: 3.59 to 22.5 mA
• Local display
– Status signal (in accordance with NAMUR Recommendation NE 107)
– Plain text display
• Operating tool via digital communication (HART, PROFIBUS PA, FOUNDATION Fieldbus) or
service interface (CDI)
– Status signal (in accordance with NAMUR Recommendation NE 107)
– Plain text display
Linearization The linearization function of the device allows the conversion of the measured value into any unit of
length or volume. Linearization tables for calculating the volume in cylindrical tanks are pre-
programmed. Other linearization tables of up to 32 value pairs can be entered manually or semi-
automatically.
Galvanic isolation All circuits for the outputs are galvanically isolated from each other.
Protocol-specific data HART
Manufacturer ID 17 (0x11)
Device type ID 0x1128
HART specification 7.0
Device description files (DTM, DD) Information and files under:
•www.endress.com
•www.fieldcommgroup.org
HART load min. 250 Ω
HART device variables The measured values can be freely assigned to the device variables.
Measured values for PV (primary variable)
• Level linearized
• Distance
• Electronic temperature
• Relative echo amplitude
• Area of incoupling
• Analog output adv. diagnostics 1
• Analog output adv. diagnostics 2
Measured values for SV, TV, FV (second, third and fourth variable)
• Level linearized
• Distance
• Electronic temperature
• Terminal voltage
• Relative echo amplitude
• Absolute echo amplitude
• Area of incoupling
• Analog output adv. diagnostics 1
• Analog output adv. diagnostics 2
Supported functions • Burst mode
• Additional transmitter status
Wireless HART data
Minimum start-up voltage 16 V
Start-up current 3.6 mA
Start-up time 65 s
Minimum operating voltage 14.0 V

Micropilot FMR51, FMR52
16 Endress+Hauser
Multidrop current 4.0 mA
Set-up time 15 s
PROFIBUS PA
Manufacturer ID 17 (0x11)
Ident number 0x1559
Profile version 3.02
GSD file Information and files under:
•www.endress.com
•www.profibus.org
GSD file version
Output values Analog Input:
• Level linearized
• Distance
• Terminal voltage
• Electronic temperature
• Absolute echo amplitude
• Relative echo amplitude
• Analog output adv. diagnostics 1
• Analog output adv. diagnostics 2
Digital Input:
• Digital output AD 1
• Digital output AD 2
• Switch output
Input values Analog Output:
• Analog value from PLC (for sensor block external pressure to compensate gas phase
effects)
• Analog value from PLC to be indicated on the display
Digital Output:
• Extended diagnostic block
• Level limiter
• Sensor block measurement on
• Sensor block save history on
• Status output
Supported functions • Identification & Maintenance
Einfachste Geräteidentifizierung seitens des Leitsystems und des Typenschildes
• Automatic Ident Number Adoption
GSD compatibility mode with respect to the preceding product Micropilot M FMR2xx
• Physical Layer Diagnostics
Installation check of the PRFIBUS segment and the Micropilot FMR5x via the terminal
voltage and telegram surveillance.
• PROFIBUS Up-/Download
Up to 10 times faster writing and reading of parameters via PROFIBUS up-/download
• Condensed Status
Simple and self-explanatory diagnostic information by categorization of occurring
diagnostic messages.
FOUNDATION Fieldbus
Manufacturer ID 0x452B48
Device type 0x1028
Device Revision 0x01
DD Revision Information and files can be found:
•www.endress.com
•www.fieldcommgroup.org
CFF Revision
Device Tester Version (ITK Version) 6.0.1
ITK Test Campaign Number IT085300
Link Master (LAS) capable yes

Micropilot FMR51, FMR52
Endress+Hauser 17
Link Master / Basic Device selectable yes; default: Basic Device
Node address Default: 247 (0xF7)
Features supported Following methods are supported:
• Restart
• ENP Restart
• Setup
• Linearization
• Self Check
Virtual Communication Relationships (VCRs)
Number of VCRs 44
Number of Link Objects in VFD 50
Permanent entries 1
Client VCRs 0
Server VCRs 10
Source VCRs 43
Sink VCRs 0
Subscriber VCRs 43
Publisher VCRs 43
Device Link Capabilities
Slot time 4
Min. inter PDU delay 8
Max. response delay 20
Transducer Blocks
Block Content Output values
Setup Transducer Block Contains all parameters for a standard commissioning
procedure
• Level or volume 1)
(Channel 1)
• Distance (Channel 2)
Advanced Setup
Transducer Block
Contains all parameters for a more detailed
configuration of the device
no output values
Display Transducer Block Contains all parameters for the configuration of the
display module
no output values
Diagnostic Transducer
Block
Contains diagnostic information no output values
Advanced Diagnostic
Transducer Block
Contains parameters for the Advanced Diagnostic no output values
Expert Configuration
Transducer Block
Contains parameters which require detailed knowledge
of the functionalities of the device
no output values
Expert Information
Transducer Block
Contains information about the state of the device no output values
Service Sensor Transducer
Block
Contains parameters which can only be operated by
Endress+Hauser service personnel
no output values
Service Information
Transducer Block
Contains information on the state of device which is
relevant for service operations
no output values
Data Transfer Transducer
Block
Contains parameters which allow to backup the device
configuration in the display module and to restore it
into the device. Access to these parameters is restricted
to the Endress+Hauser service.
no output values
1) depending on the configuration of the block

Micropilot FMR51, FMR52
18 Endress+Hauser
Function Blocks
Block Content Number of
permanent
blocks
Number of
instantiable
blocks
Execution
time
Functionality
Resource Block The Resource Block contains all the
data that uniquely identifies the
field device. It is an electronic
version of a nameplate of the
device.
1 0 - enhanced
Analog Input
Block
The AI block takes the
manufacturer's input data, selected
by channel number, and makes it
available to other function blocks at
its output.
2 3 25 ms enhanced
Discrete Input
Block
The DI block takes a discrete input
value (e.g. indication of an level
limit), and makes it available to
other function blocks at its output.
1 2 20 ms standard
Mutiple
Analog Output
Block
This block is used to transfer analog
data from the bus into the device
1 0 20 ms standard
Mutiple
Discrete
Output Block
This block is used to transfer
discrete data from the bus to the
device.
1 0 20 ms standard
PID Block The PID block serves as
proportional-integralderivative
controller and is used almost
universally to do closed-loop-
control in the field including
cascade and feedforward.
1 1 25 ms standard
Arithmetic
Block
This block is designed to permit
simple use of popular measurement
math functions. The user does not
have to know how to write
equations. The math algorithm is
selected by name, chosen by the
user for the function to be done.
1 1 25 ms standard
Signal
Characterizer
Block
The signal characterizer block has
two sections, each with an output
that is a non-linear function of the
respective input. The non-linear
function is determined by a single
look-up table with 21 arbitrary x-y
pairs.
1 1 25 ms standard
Input Selector
Block
The input selector block provides
selection of up to four inputs and
generates an output based on the
configured action. This block
normally receives its inputs from AI
blocks. The block performs
maximum, minimum, middle,
average and ‘first good’ signal
selection.
1 1 25 ms standard

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Endress+Hauser 19
Block Content Number of
permanent
blocks
Number of
instantiable
blocks
Execution
time
Functionality
Integrator
Block
The Integrator Function Block
integrates a variable as a function
of the time or accumulates the
counts from a Pulse Input block.
The block may be used as a
totalizer that counts up until reset
or as a batch totalizer that has a
setpoint, where the integrated or
accumulated value is compared to
pre-trip and trip settings,
generating discrete signals when
these settings are reached.
1 1 25 ms standard
Analog Alarm
Block
1 1 25 ms standard
Up to 20 blocks can be instantiated in the device altogether, including the blocks already
instantiated on delivery.

Micropilot FMR51, FMR52
20 Endress+Hauser
Power supply
Terminal assignment 2-wire: 4-20mA HART
8
9
1
+
2
4...20mA
HART
10 mm
Spare part
71108xxx
2- wire level
4-20 mA 4-20 mA
HART
[21]
open
-
1
+2
4-20mA
1-channel overvoltage protection
-
[16]
A
7
B
!
4...20 mA
5
4
12
3
+
–
+
–
#
+
–
4...20 mA
5
4
12
3
+
–
6
#
A0011294
 2 Terminal assignment 2-wire; 4-20mA HART
A Without integrated overvoltage protection
B With integrated overvoltage protection
1 Active barrier with power supply (e.g. RN221N): Observe terminal voltage
2 HART communication resistor (≥ 250 Ω): Observe maximum load
3 Connection for Commubox FXA195 or FieldXpert SFX350/SFX370 (via VIATOR Bluetooth modem)
4 Analog display device: Observe maximum load
5 Cable screen; observe cable specification
6 4-20mA HART (passive): Terminals 1 and 2
7 Overvoltage protection module
8 Terminal for potential equalization line
9 Cable entry