Endress+Hauser Levelflex FMP56 Manual

Level measurement in bulk solids
Application
• Rod or rope probe
• Process connection: Starting 3/4" thread or flange
• Process temperature: –40 to +185 °C (–40 to +365 °F)
• Process pressure: –1 to +16 bar (–14.5 to +232 psi)
• Maximum measuring range: Rod 4 m (13 ft); rope 45 m (148 ft)
• Accuracy: ±2 mm (±0.08 in)
• International explosion protection certificates; EN10204-3.1
• 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
• Hardware and software developed according to IEC 61508 (up to SIL3)
• Seamless integration into control or asset management systems
• Intuitive user interface in national languages
•Bluetooth® wireless technology for commissioning, operation and maintenance via
free iOS / Android app SmartBlue
• Easy proof test for SIL
• Heartbeat Technology™
Products Solutions Services
Technical Information
Levelflex FMP56, FMP57
Guided wave radar
TI01004F/00/EN/25.22-00
71603695
2022-12-13

Levelflex FMP56, FMP57
2 Endress+Hauser
Table of contents
Important document information ............... 4
Symbols .................................... 4
Function and system design ................... 5
Measuring principle ............................ 5
Measuring system ............................. 7
Input .................................... 10
Measured variable ............................ 10
Measuring range ............................. 10
Blocking distance ............................ 12
Measuring frequency spectrum ................... 12
Output .................................. 13
Output signal ............................... 13
Signal on alarm .............................. 14
Linearization ............................... 14
Galvanic isolation ............................ 14
Protocol-specific data .......................... 15
Power supply ............................. 20
Terminal assignment .......................... 20
Device plug ................................. 25
Supply voltage .............................. 25
Power consumption ........................... 28
Current consumption .......................... 28
Power supply failure .......................... 29
Potential equalization ......................... 29
Terminals ................................. 29
Cable entries ............................... 29
Cable specification ............................ 29
Overvoltage protection ......................... 30
Performance characteristics .................. 31
Reference operating conditions ................... 31
Reference accuracy ........................... 31
Resolution ................................. 32
Response time .............................. 33
Influence of ambient temperature ................. 33
Mounting ................................ 34
Mounting requirements ........................ 34
Environment .............................. 49
Ambient temperature .......................... 49
Ambient temperature limits ..................... 49
Storage temperature .......................... 51
Climate class ............................... 51
Altitude according to IEC61010-1 Ed.3 .............. 52
Degree of protection .......................... 52
Vibration resistance ........................... 52
Cleaning the probe ........................... 52
Electromagnetic compatibility (EMC) ............... 52
Process .................................. 53
Process temperature range ...................... 53
Process pressure range ......................... 53
Dielectric constant (DC) ........................ 53
Extension of the rope probes due to tension and
temperature ................................ 53
Mechanical construction .................... 54
Dimensions ................................ 54
Probe length tolerances ........................ 58
Shortening probes ............................ 58
Weight ................................... 59
Materials: GT18 housing (stainless steel, corrosion-
resistant) .................................. 59
Materials: GT19 housing (plastic) .................. 60
Materials: GT20 housing (die-cast aluminum, powder-
coated) ................................... 60
Materials: Process connection .................... 61
Materials: Probe ............................. 62
Materials: Mounting bracket ..................... 63
Materials: Adapter and cable for remote sensor ........ 64
Materials: weather protection cover ................ 65
Operability ............................... 65
Operating concept ............................ 65
Local operation .............................. 67
Operation with remote display and operating module
FHX50 ................................... 67
Operation via Bluetooth® wireless technology .......... 68
Remote operation ............................ 69
SupplyCare inventory management software .......... 72
Certificates and approvals ................... 75
CE mark ................................... 75
RoHS ..................................... 75
RCM marking ............................... 75
Ex-approval ................................ 75
Dual seal according to ANSI/ISA 12.27.01 ............ 75
Functional safety ............................. 75
ASME B31.1 and B31.3 ........................ 75
Pressure equipment with allowable pressure ≤
200 bar (2 900 psi) ........................... 75
Marine approval ............................. 76
Radio approval .............................. 76
CRN approval ............................... 76
Experience ................................. 76
Test, certificate .............................. 77
Product documentation on paper .................. 77
Other standards and guidelines ................... 78
Ordering information ....................... 79
Ordering information .......................... 79
3-point linearity protocol ....................... 80
5-point linearity protocol ....................... 81
Customized parameterization .................... 82
Labeling (optional) ........................... 82
Application packages ....................... 82
Heartbeat Diagnostics ......................... 82
Heartbeat Verification ......................... 83

Levelflex FMP56, FMP57
Endress+Hauser 3
Heartbeat Monitoring ......................... 83
Accessories ............................... 84
Device-specific accessories ...................... 84
Communication-specific accessories ................ 90
Service-specific accessories ...................... 91
System components ........................... 91
Supplementary documentation ............... 91
Brief Operating Instructions (KA) .................. 91
Operating Instructions (BA) ..................... 91
Safety Instructions (XA) ........................ 91
Functional Safety Manual (FY/SD) ................. 91

Levelflex FMP56, FMP57
4 Endress+Hauser
Important document information
Symbols Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in serious or
fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in serious or
fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in minor or
medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in personal
injury.
Electrical symbols
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)
Ground terminals that must be connected to ground prior to establishing any other connections.
The ground terminals are located on the inside and outside of the device.
• Inner ground terminal; protective earth is connected to the mains supply.
• Outer ground terminal; device is connected to the plant grounding system.
Symbols for certain types of information and graphics
Permitted
Procedures, processes or actions that are permitted
Forbidden
Procedures, processes or actions that are forbidden
Tip
Indicates additional information
Reference to documentation
Reference to graphic
Notice or individual step to be observed
1.
,
2.
,
3.
Series of steps
Result of a step
1, 2, 3, ...
Item numbers
A, B, C, ...
Views
Temperature resistance of the connection cables
Specifies the minimum value of the temperature resistance of the connection cables

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Endress+Hauser 5
Function and system design
Measuring principle General principles
The Levelflex is a "downward-looking" measuring system that functions according to the time-of-
flight method (ToF). The distance from the reference point to the product surface is measured. High-
frequency pulses are injected to a probe and led along the probe. The pulses are reflected by the
product surface, received by the electronic evaluation unit and converted into level information. This
method is also known as TDR (time domain reflectometry).
F
L
D
E
20 mA
100%
4 mA
0%
LN
R
A0012838
 1 Parameters for level measurement with guided wave radar
LN Probe length
D Distance
L Level
R Reference point of measurement
E Empty calibration (= zero)
F Full calibration (= span)
If the εr value is less than 7 in the case of rope probes, measurement is not possible in the area
of the tensioning weight (0 to 250 mm (0 to 9.84 in) from the probe end), (lower blocking
distance).
The reference point R of the measurement is located at the process connection.

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Dielectric constant
The dielectric constant (DC) of the medium directly affects the degree of reflection of the high-
frequency pulses. In the case of large DC values, such as with water or ammonia, there is strong
pulse reflection while, in the case of low DC values, such as with hydrocarbons, pulse reflection is
weak.
Input
The reflected pulses are transmitted from the probe to the electronics. Here, a microprocessor
evaluates the signals and identifies the level echo which was caused by the reflection of the high-
frequency pulses at the product surface. This clear signal detection system benefits from over 30
years of experience with pulse time-of-flight procedures that have gone into the development of the
PulseMaster® software.
The distance D to the product surface is proportional to the time-of-flight t of the pulse:
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 Levelflex has functions for interference echo suppression that can be activated by the user. They
guarantee that interference echoes from internal fixtures and struts, for example, are not interpreted
as level echoes.
Output
The Levelflex is preadjusted at the factory to the probe length ordered so that in most cases only the
application parameters that automatically adapt the device to the measuring conditions need to be
entered. 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 0 % and 100 %. A linearization function
with max. 32 points, based on a table entered either manually or semi-automatically, can be
activated locally or remotely. This function allows the level to be converted into units of volume or
mass, for example.

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Life cycle of the product
Design
• Universal measuring principle
• Measurement is unaffected by product properties
• Hardware and software developed according to SIL IEC 61508
• Genuine, direct interface measurement
Procurement
• As the global market leader in level measurement, Endress+Hauser guarantees the security of
your investment
• Worldwide support and service
Installation
• No special tools are required
• Protection against reverse polarity
• Modern, detachable terminals
• Main electronics protected by a separate connection compartment
Commissioning
• Fast, menu-guided commissioning in just 6 steps
• Plain text display in local language reduces the risk of error or confusion
• Direct local access to all parameters
• Printed Brief Operating Instructions in the device onsite
Operation
• Multi-echo tracking: Reliable measurement thanks to self-learning echo search algorithms taking
into account the short-term and long-term history and plausibility of the detected signals to
suppress interference echoes.
• In accordance with NAMUR NE107
Maintenance
• HistoROM: Data backup for device settings and measured values
• Exact device and process diagnostics to assist fast decisions with clear information regarding
remedial action
• Intuitive, menu-guided operating concept in local language saves costs for training, maintenance
and operation
• Cover of the electronics compartment can also be opened in the hazardous area
Retirement
• Order code translation for subsequent models
• RoHS-compliant (Restriction of certain Hazardous Substances), unleaded soldering of electronic
components
• Environmentally friendly recycling approach
Measuring system General notes on probe selection
• Rope probes should normally be used for bulk solids. Rod probes are only suitable in bulk solids for
short measuring ranges up to approx. 2 m (6.6 ft). This applies particularly to applications in
which the probe is installed laterally at an angle and for light and pourable bulk solids.
• In the case of large silos, the lateral pressure on the rope can be so high that a rope with plastic
jacketing must be used. We recommend the use of PA-coated ropes for milled products such as
cereals, wheat and flour.
Probe selection
FMP56
For level measurement in bulk solids

Levelflex FMP56, FMP57
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A0011388
 2 Rope probe with centering rod
Rope probe
• Maximum probe length
12 m (40 ft)
• Material:
• 316L
• PA>steel
• Maximum tensile loading capacity
12 kN
FMP57
For level measurement in bulk solids
A0011387
 3 Rod probe
Rod probe
• Maximum probe length
4 m (13 ft)
• Material:
316L
• Maximum tensile loading capacity
30 kN

Levelflex FMP56, FMP57
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A0011388
 4 Rope probe with centering rod
Rope probe
• Maximum probe length
45 m (148 ft)
• Material:
• 316L
• PA>steel
• Maximum tensile loading capacity
30 kN

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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 based on "E", the empty distance entered.
Optionally, the level can be converted to other variables (volume, mass) by linearization (32 points).
Measuring range The following table describes the medium groups and the possible measuring range as a function of
the medium group.
Levelflex FMP56
Medium group εrTypical bulk solids
Measuring range
Bare metallic
Rope probes
PA-coated
Rope probes
1 1.4 to 1.6 Plastic powder 12 m (39 ft) 1) —
2 1.6 to 1.9 • Plastic granulate
• White lime, special cement
• Sugar
12 m (39 ft) 12 m (39 ft)
3 1.9 to 2.5 Portland cement, plaster 12 m (39 ft) —
Flour — 12 m (39 ft)
4 2.5 to 4 Grain, seeds — 12 m (39 ft)
• Ground stones
• Sand
12 m (39 ft) 12 m (39 ft)
5 4 to 7 • Naturally moist (ground) stones, ores
• Salt
12 m (39 ft) 12 m (39 ft)
6 > 7 • Metal powder
• Carbon black
• Coal dust
12 m (39 ft) 12 m (39 ft)
1) Restriction: The measuring range may be reduced for media with strong signal damping, e.g. milled products, wheat bran or silicic acid.

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Levelflex FMP57
Medium group εrTypical bulk solids
Measuring range
Bare metallic
Rod probes
Bare metallic
Rope probes
PA-coated
Rope probes
1 1.4 to 1.6 Plastic powder 4 m (13 ft) 1) 20 to 25 m
(66 to 82 ft) 1) —
2 1.6 to 1.9 • Plastic granulate
• White lime, special cement
• Sugar
4 m (13 ft) 25 to 30 m
(82 to 98 ft)
12.5 to 15 m
(41 to 49 ft)
3 1.9 to 2.5 Portland cement, plaster 4 m (13 ft) 30 to 45 m
(98 to 148 ft)
—
Flour 4 m (13 ft) — 15 to 25 m (49 to 82 ft)
4 2.5 to 4 Grain, seeds 4 m (13 ft) — 25 to 35 m
(82 to 115 ft)
• Ground stones
• Sand
4 m (13 ft) 45 m (148 ft) 25 to 35 m
(82 to 115 ft)
5 4 to 7 • Naturally moist (ground) stones, ores
• Salt
4 m (13 ft) 45 m (148 ft) 35 to 36 m
(115 to 118 ft)
6 > 7 • Metal powder
• Carbon black
• Coal dust
4 m (13 ft) 45 m (148 ft) 36 to 45 m
(118 to 148 ft)
1) Restriction: The measuring range may be reduced for media with strong signal damping, e.g. milled products, wheat bran or silicic acid.
• The formation of buildup, particularly of moist products, can reduce the maximum possible
measuring range.
• For very loose or loosened bulk solids, the lower group applies in each case.

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Blocking distance The upper blocking distance (= UB) is the minimum distance from the reference point of the
measurement (mounting flange) to the maximum level.
F
UB
E
100%
0%
LN
R
SD
A0013628
 5 Definition of blocking distance and safety distance
R Reference point of measurement
LN Probe length
UB Upper blocking distance
E Empty calibration (= zero)
F Full calibration (= span)
SD Safety distance
Blocking distance (factory setting):
• For rod and rope probes up to 8 m (26 ft): 200 mm (8 in)
• For rod and rope probes over 8 m (26 ft): 0.025 × probe length
The specified blocking distances are factory-preset on delivery. These settings can be changed
depending on the application.
For rod and rope probes, the blocking distance can generally be reduced to 100 mm (4 in) for
media with DC > 7.
No blocking distance applies for applications in a bypass/stilling well.
A reliable measurement cannot be guaranteed within the blocking distance.
A safety distance SD can be defined in addition to the blocking distance. The device generates a
warning if the level rises to enter this safety distance.
Measuring frequency
spectrum
100 MHz to 1.5 GHz

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Output
Output signal HART
• Signal coding:
FSK ±0.5 mA over current signal
• Data transmission rate:
1 200 Bit/s
• Galvanic isolation:
Yes
Bluetooth® wireless technology
• Device version:
Order code 610 "Accessory mounted", option NF "Bluetooth"
• Operation / configuration:
Via the SmartBlue app
• Range under reference conditions:
> 10 m (33 ft)
• Encryption:
Encrypted communication and password encryption prevent incorrect operation by unauthorized
persons
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.
• Function:
Open collector switch output
• Switching behavior:
Binary (conductive or non-conductive), switches when the programmable switch-on point/switch-
off point is reached
• Failure mode:
Non-conductive
• Electrical connection data:
U = 16 to 35 VDC, I = 0 to 40 mA
• Internal resistor:
RI < 880 Ω
The voltage drop at this internal resistor must be taken into account when planning the
configuration. For example, the resulting voltage at a connected relay must be sufficient to switch
the relay.
• Insulation voltages:
Floating, insulation voltage 1 350 VDC in relation to power supply and 500 VAC ground
• Switch point:
User-programmable, separate for switch-on point and switch-off point
• Switching delay:
User-programmable in the 0 to 100 s range, separate for switch-on point and switch-off point

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• Scan rate:
Corresponds to the measuring cycle
• Signal source / device variables:
• Level linearized
• Distance
• Terminal voltage
• Electronic temperature
• Relative echo amplitude
• Diagnostic values, advanced diagnostic blocks
• Only for active interface measurement
• Number of switch cycles:
Unlimited
Signal on alarm Depending on the interface, failure information is displayed as follows:
• Current output
• Choice of failure mode (in accordance with NAMUR Recommendation NE 43):
Minimum alarm: 3.6 mA
Maximum alarm (= factory setting): 22 mA
• Failure mode with user-configurable value: 3.59 to 22.5 mA
• Local display
• Status signal (as per NAMUR Recommendation NE 107)
• Plain text display
• Operating tool via digital communication (HART, PROFIBUS PA, FOUNDATION Fieldbus) or
service interface (CDI)
• Status signal (as per NAMUR Recommendation NE 107)
• Plain text display
Linearization The device's linearization function allows the user to convert the measured value to any length or
volume units. Linearization tables for calculating the volume in cylindrical vessels are
preprogrammed into the device. Other 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.

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Protocol-specific data HART
Manufacturer ID 17 (0x11)
Device type ID 0x1122
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
Measured values for SV, TV, QV (second, third and fourth variable)
• Level linearized
• Distance
• Terminal voltage
• Electronic temperature
• Absolute echo amplitude
• Relative echo amplitude
• Calculated εr value
Supported functions • Burst mode
• Additional transmitter status
Wireless HART data
Minimum starting voltage 17.5 V
Start-up current 4 mA
Starting time 80 s
Minimum operating voltage 17.5 V
Multidrop current 4.0 mA
Time for connection setup 30 s

Levelflex FMP56, FMP57
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PROFIBUS PA
Manufacturer ID 17 (0x11)
Ident number 0x1558
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
• Calculated εr value
Digital Input:
• Extended diagnostic blocks
• Status output PFS Block
Input values Analog Output:
• Analog value from PLC (for sensor block, external pressure and temperature)
• 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
Simple device identification via control system and nameplate
• Automatic Ident Number Adoption
GSD compatibility mode with predecessor Levelflex M FMP4x
• Physical Layer Diagnostics
Installation check of the PROFIBUS segment and the Levelflex M FMP4x using
terminal voltage and message monitoring
• PROFIBUS upload/download
Reading and writing parameters is up to ten times faster with PROFIBUS upload/
download
• Condensed status
Simplest and self-explanatory diagnostic information by categorizing diagnostic
messages that occur
FOUNDATION Fieldbus
Manufacturer ID 0x452B48
Device type 0x1028
Device revision 0x01
DD revision Information and files under:
•www.endress.com
•www.fieldcommgroup.org
CFF revision
Device Tester Version (ITK version) 6.0.1
ITK Test Campaign Number IT085300
Link Master capability (LAS) Yes
Choice of "Link Master" and "Basic Device" Yes; Factory setting: Basic Device
Node address Factory setting: 247 (0xF7)

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Supported functions The 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. delay between PDU 8
Max. response delay 20
Transducer Blocks
Block Contents Output values
Setup Transducer Block Contains all the parameters for standard
commissioning
• Level or volume (channel
1)
(depending on the block
configuration)
• Distance (channel 2)
Advanced Setup
Transducer Block
Contains all the parameters for more accurate
measurement configuration
No output values
Display Transducer Block Contains parameters to configure the onsite display No output values
Diagnostic Transducer
Block
Contains diagnostic information No output values
Advanced Diagnostic
Transducer Block
Contains parameters for advanced diagnostics No output values
Expert Configuration
Transducer Block
Contains parameters that require the user to have
in-depth knowledge of the operation of the device in
order to configure the parameters appropriately
No output values
Expert Information
Transducer Block
Contains parameters that provide information about
the state of the device
No output values
Service Sensor
Transducer Block
Contains parameters that can only be accessed by
Endress+Hauser Service
No output values
Service Information
Transducer Block
Contains parameters that provide Endress+Hauser
Service with information about the state of the
device
No output values
Data Transfer
Transducer Block
Contains parameters for backing up the device
configuration in the display module and for writing
the saved configuration to the device. Access to
these parameters is reserved for Endress+Hauser
Service.
No output values

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Function blocks
Block Contents Number of
permanent
blocks
Number of
instantiatable
blocks
Execution
time
Functionality
Resource Block The Resource Block contains all
the data that uniquely identify
the device. It is an electronic
version of a nameplate of the
device.
1 0 - Enhanced
Analog Input
Block
The AI Block receives the
measuring data from the Sensor
Block (selectable via a channel
number), and makes the data
available to other blocks at its
output.
2 3 25 ms Enhanced
Discrete Input
Block
The Discrete Input Block receives
a discrete value (e.g. indicator
that measuring range has been
exceeded) and makes the value
available for other blocks at the
output.
1 2 20 ms Standard
Multiple
Analog Output
Block
The Multiple Analog Output
Block is used to transmit analog
values from the bus to the device.
1 0 20 ms Standard
Multiple
Discrete
Output Block
The Multiple Discrete Output
Block is used to transmit discrete
values from the bus to the device.
1 0 20 ms Standard
PID Block The PID Block is used as a
proportional-integral-derivative
controller and can be used
universally for closed-loop-
control in the field. It enables
cascade mode and feedforward
control.
1 1 25 ms Standard
Arithmetic
Block
The Arithmetic 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 performed.
1 1 25 ms Standard
Signal
Characterizer
Block
The Signal Characterizer Block
has two sections, each with an
output value that is a non-linear
function of the input value. The
non-linear function is generated
by a single look-up table with 21
arbitrary x-y pairs.
1 1 25 ms Standard
Input Selector
Block
The Input Selector Block
facilitates the selection of up to
four inputs and generates an
output value based on the
configured action. This block
normally receives its inputs from
AI Blocks. The block enables the
selection of maximum, minimum,
average and ‘first good’ values.
1 1 25 ms Standard

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Block Contents Number of
permanent
blocks
Number of
instantiatable
blocks
Execution
time
Functionality
Integrator
Block
The Integrator Block integrates a
variable as a function of the time
or accumulates the counts from a
Pulse Input Block. The Block can
be used as a totalizer that
totalizes until a reset, or as a
batch totalizer whereby the
integrated value is compared
against a target value generated
before or during the control
routine and generates a binary
signal when the target value is
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.

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20 Endress+Hauser
Power supply
Terminal assignment
Terminal assignment, 2-wire: 4 to 20 mA HART
1
+
2
-
A
1
+
2
-
B
1
2
33
A0036498
 6 Terminal assignment, 2-wire: 4 to 20 mA HART
A Without integrated overvoltage protection
B With integrated overvoltage protection
1 Connection 4 to 20 mA, HART passive: terminals 1 and 2, without integrated overvoltage protection
2 Connection 4 to 20 mA, HART passive: terminals 1 and 2, with integrated overvoltage protection
3 Terminal for cable shield
Block diagram, 2-wire: 4 to 20 mA HART
5
4
1
2
3
++
--
Y
I
6
1
2
A0036499
 7 Block diagram, 2-wire: 4 to 20 mA HART
1 Active barrier for power supply (e.g. RN221N); observe terminal voltage
2 Resistor for HART communication (≥ 250 Ω); observe maximum load
3 Connection for Commubox FXA195 or FieldXpert SFX350/SFX370 (via VIATOR Bluetooth modem)
4 Analog display unit; observe maximum load
5 Cable screen; observe cable specification
6 Measuring device
Terminal assignment, 2-wire: 4 to 20 mA HART, switch output
A
1
+
2
-
3
+
4
-
B
1
+
2
-
3
+
4
-
1
3
55
2
4
A0036500
 8 Terminal assignment, 2-wire: 4 to 20 mA HART, switch output
A Without integrated overvoltage protection
B With integrated overvoltage protection
1 Connection 4 to 20 mA, HART passive: terminals 1 and 2, without integrated overvoltage protection
2 Connection, switch output (open collector): terminals 3 and 4, without integrated overvoltage protection
3 Connection, switch output (open collector): terminals 3 and 4, with integrated overvoltage protection
4 Connection 4 to 20 mA, HART passive: terminals 1 and 2, with integrated overvoltage protection
5 Terminal for cable shield