KRAL BEM 500 Series User manual

www.kral.at
Operating Instructions
KRAL Electronics.
Series BEM 500
OIE 12en
Edition 2019-02 HW 3.003/SW 3.004

2 OIE 12en Edition 2019-02 Operating Instructions
Table of content
KRAL Electronics – Series BEM 500
About this document
□Target groups 4
□Symbols 4
□Danger levels 5
□Associated documents 5
□General safety instructions 5
Function description
□Volume measurement 6
□Mass calculation 6
□Linearization 6
□Temperature compensation 7
□Differential measurement 7
□Circulation ratio and threshold value 7
□Averaging 7
□Limit value 7
□Collective error message 7
□Flow direction detection 8
□Batching 8
□Electronic evaluation 8
□Bus connection 8
□Applications of the KRAL electronic unit 9
▪ Single-line measurement 9
▪ Differential measurement 10
Transportation, storage and maintenance
□Unpacking and checking the state of
delivery 11
□Transportation 11
□Storage 11
□Disposal 11
▪ Safety instruction for disposal 11
▪ Disposing of the electronic unit 11
□Maintenance 11
□Cleaning 11
Installation and removal
□Safety instructions on installation, removal
and connection 12
□Installation 12
▪ Dimensions 12
▪ Scope of delivery 12
▪ Installation in the control cabinet 13
▪ Wall mounting 14
▪ Pipe mounting/mounting on volumeter 14
□Removal 15
▪ Removing the electronic unit from the
control cabinet 15
▪ Removing the electronic unit from the
wall 15
▪ Removing the electronic unit from the
pipe/volumeter 15
Technical data
□Termination panel of the electronic unit 16
□Technical data of connections 17
▪ Power supply 17
▪ Tension spring terminals 17
▪ Pulse and temperature inputs 17
▪ Analog, pulse and relay outputs 17
▪ Display 18
▪ Modbus interface 18
▪ Ambient conditions 21
□Connection assignments 21
▪ Pick up Volumeter A 21
▪ Pick up Volumeter B 21
▪ Analog outputs 21
▪ Pulse outputs 22
▪ Relay outputs 22
▪ Temperature sensor Volumeter A 22
▪ Temperature sensor Volumeter B 22
▪ 24 V DC connection 22
▪ Serial interface 22
Commissioning
□Safety instructions for commissioning 23
□Connecting cables 23
▪ Safety instructions for electrical
installation 23
▪ Connecting cables to the tension
spring terminals 24
▪ Connect the pick ups and temperature
sensors 25
▪ Connecting the analog, relay and
pulse outputs 25
▪ Connecting the power supply 26
□Checking the electronic unit 27
□Taking the electronic unit out of operation 27
Operation of the basic functions
□Key assignment 28
□Operation at a glance 29
▪ General operating steps 29
▪ Operating the basic functions 30
□Abbreviations, quantities and units 31
▪ Abbreviations used 31
▪ Quantities and units 31
▪ Pulse signals 31
Menu description
□Menu structure 32
□Start 34
▪ Start message 34
□Shortcut pages 34
▪ 1.13 Setting select language 34
▪ 1.31 Help operation 34
▪ Menu 8: Alarms 34

Operating Instructions OIE 12en Edition 2019-02 3
Table of content
KRAL Electronics – Series BEM 500
□Menu 1: Display 34
▪ 1.01 Consumption 34
▪ 1.02 Total with reset 34
▪ 1.03 Volumeter A 35
▪ 1.04 Volumeter A Total with reset 35
▪ 1.05 Volumeter B 35
▪ 1.06 Volumeter B Total with reset 35
▪ 1.07 Batch quantity 35
▪ 1.08 Flow direction change Volumeter A 36
▪ 1.09 Flow direction change Volumeter B 36
▪ 1.10 Reset bypass and
collective error message 36
▪ 1.11 Setting display brightness 36
▪ 1.12 Setting display contrast 36
▪ 1.13 Setting select language 36
□Menu 2: General settings 36
▪ 2.01 Enable password 36
▪ 2.02 Change password 37
▪ 2.03 Select mode 37
▪ 2.04 Select temperature X 37
▪ 2.05 Select unit rate 37
▪ 2.06 Select unit total 37
▪ 2.07 Select unit temperature 37
▪ 2.08 Select unit density 37
▪ 2.09 Select density determination 38
▪ 2.10 Number of decimal places 38
▪ 2.11 Display start message 38
▪ 2.12 Function pick up 38
▪ 2.13 Function pulse inputs 38
▪ 2.14 Link channel 38
▪ 2.15 Threshold value A-B 38
▪ 2.16 Averaging display rate 39
▪ 2.17 Deactivate alarm messages 39
▪ 2.18 Maximum flow rate error message 39
▪ 2.19 Minimum temperature Volumeter 39
▪ 2.20 Maximum temperature Volumeter 40
▪ 2.21 Reset to factory settings 40
□Menu 3: Output settings 40
▪ 3.01 Function analog output 40
▪ 3.02 Allocation analog output 1 40
▪ 3.03 Scale analog output 1 40
▪ 3.04 Allocation analog output 2 40
▪ 3.05 Scale analog output 2 40
▪ 3.06 Averaging analog output 41
▪ 3.07 Function pulse output 41
▪ 3.08 Allocation pulse output 1 41
▪ 3.09 Scale pulse output 1 41
▪ 3.10 Allocation pulse output 2 42
▪ 3.11 Scale pulse output 2 42
▪ 3.12 Pulse output pulse width 42
▪ 3.13 Function relay 1 42
▪ 3.14 Limit value bypass 43
▪ 3.15 Delay bypass 43
▪ 3.16 Waiting period repeat bypass 43
▪ 3.17 Relay 1 switch 43
▪ 3.18 Relay 2 switch 43
▪ 3.19 Address Modbus 44
□Menu 4: K-factors Volumeter A 44
▪ 4.01 Volumeter A Point 1 44
▪ 4.02 Volumeter A Point 2 44
□Menu 5: K-factors Volumeter B 44
▪ 5.01 Volumeter B Point 1 44
□
Menu 6: Density table 1/
Density determination 44
▪ 6.01 Density table 1 Point 1 45
▪ 6.02 Density table 1 Point 2 45
▪ 6.20 Density calculation 45
□Menu 7: Density table 2 45
▪ 7.01 Point 1 46
□Menu 8: Alarms 46
Troubleshooting
□Information about faults 47
□Alarms 47
□Further faults 52
Accessories
□Accessories mounting 54
▪ Universal mount fixing kit 54
▪ Fixing kit for pipe mounting /
mounting on OMG 54
▪ Fixing kit OME 55
▪ Adapter set for conversion of
BEM 4U to BEM 300/500 55
□Accessories electrical connection 56
▪ Rack mounting power supply unit
EEN 12 56
▪ Plug-in power supply unit EEN 13 58
□Data acquisition accessories 59
▪ Data logger BEA 80 and BEA 81 59
□Display accessories 60
▪ Remote display BEA 59 60
Appendix
□Glossary 61
□Notes 63

4 OIE 12en Edition 2019-02 Operating Instructions
Target groups
About this document
About t his do cument
The operating instructions form part of the BEM 500 electronic unit and must be kept for future
reference. Furthermore please observe the associated documents.
Target groups
Symbols
Target group Tasks
Operator-owner □Keep these instructions available at the installation site for future
reference.
□Ensure that employees read and observe these instructions and the
associated documents, in particular the safety instructions and
warnings.
□Observe additional system-specific directives and regulations.
Specialist personnel, fitters □Read, observe and follow these instructions and the associated
documents, in particular the safety instructions and warnings.
Symbol Meaning
Warning
Note
Action steps installation and removal
Action steps electrical installation
Check or fault table
Operating steps for electronic unit
Faults in the electronic unit
Faults in the KRAL Volumeter
Faults in the plant
Input errors
Request for action

Operating Instructions OIE 12en Edition 2019-02 5
Danger levels
About this document
Danger levels
Associated documents
General safety instructions
Warning Danger level Consequences of non-observances
Danger Immediate threat of danger Serious personal injury, death
Warning Possible threat of danger Serious personal injury, invalidity
Caution Potentially dangerous situation Slight personal injury
Caution Potentially dangerous situation Material damage
Declaration of conformity as per EU Directive 2014/30/EU and 2014/35/EU
Corresponding operating instructions for the Volumeter
Corresponding operating instructions for the sensor
Calibration certificate
Work sheet
The following safety instructions must be observed:
□No liability is accepted for damage arising through non-observance of the operating instructions.
▪ Read the operating instructions carefully and observe them.
▪ The operator-owner is responsible for the observance of the operating instructions.
▪ Installation, removal and installation work may only be carried out by specialist personnel.
□Implement all the supply lines without faults.
□Observe the general regulations for the prevention of accidents as well as the local safety and
operating instructions.
□Observe the valid national and international standards and specifications of the installation
location.

6 OIE 12en Edition 2019-02 Operating Instructions
Volume measurement
Function description
Functi on descr iption
With its functional scope the KRAL electronic unit covers a wide range of functions. The electronic unit is
optimized for use together with KRAL Volumeters. KRAL Volumeters generate a specific number of
pulses per flow volume unit - depending on the size and working point. This device-specific
characteristic is called the K-factor (unit: Pulse/Liter) and can be found on the enclosed calibration
certificate.
The pulse signals of up to two volumeters can be evaluated. The following signals are available:
□PNP
□Namur
□NPN
Either PNP or NPN can be selected for push-pull pick ups.
In addition the devices can also be equipped with temperature sensors and further pick ups for flow
direction detection. The electronic unit is supplied with settings in accordance with the customer
requirements.
Together with diverse options for signal transfer with analog, pulse and bus outputs this means that an
extensive scope of performance is available that offers the following main possibilities:
Volume measurement
The instantaneous value of the volume flow (volume per time unit) is calculated from the measured
value of the incoming pulses per time unit and the stored mean K-factor and is displayed. Furthermore
the total number of measured pulses can be used to display the total flow (volume) as a total value since
the device was last reset. Rate values represent the current instantaneous values, total values
correspond to the sums since the last resetting.
Mass calculation
The instantaneous value of the mass flow (mass per time unit) is calculated from the measured value of
the incoming pulses per time unit and the stored values of mean K-factor and mean density and is
displayed. Furthermore the total number of measured pulses can be used to display the total flow
(mass) as a total value since the device was last reset.
Rate values represent the current instantaneous values, total values correspond to the sums since the
last resetting.
Linearization
However, the K-factor of a volumeter shows slightly different values at different flow rates. These are
documented in the enclosed calibration certificate. In order to improve the measuring precision,
especially at strongly varying flow rates, these different values can be taken into consideration by means
of a "Linearization". To this purpose the K-factors are stored in a table across up to seven interpolation
values in accordance with the flow rate. The K-factor relevant for the flow rate being measured is then
determined by means of linear interpolation between the two nearest interpolation values.
The linearization is used when the fluid lies in the low-viscosity range. At viscosities exceeding
20 mm
2
/s the use of the resulting K-factor is recommended. The resulting K-factor is determined as the
average value of the calibration points at the five higher flow rate values.

Operating Instructions OIE 12en Edition 2019-02 7
Temperature compensation
Function description
Temperature compensation
If the KRAL volumeter is additionally equipped with a temperature sensor, the current density of the
flowing fluid can be calculated from this measured value by means of a stored density table.
□At the option "Volume at X°", a normalized volume measurement is then possible at which the
displayed values are converted to a reference temperature X° that can be selected freely. This
ensures that measuring errors caused by changes in the density due to temperature variations are
avoided.
□The option "Volume at TempA" calculates the volume back to the temperature volumeter A. This
option allows the comparison with a reservoir level.
□Measuring errors are also reduced at the "Mass calculation" option, since the device can now
process the actual density and not only a stored mean value at the mass conversion. For the case of
operation with different fluids two different density tables can be entered and selected.
Differential measurement
The KRAL electronic unit can process the signals of two volumeters and determine and display the links
possible with it.
□The option differential measurement "A-B" allows the subtraction of the values of the two channels,
e.g. feed and return of a consumer supplied with a closed circular pipeline and thus allows the direct
display of the consumer of this device.
□The option sum "A+B" allows the addition of the two measured values and thus, for example, the
display of the total of two devices.
Circulation ratio and threshold value
The ratio A/(A-B) is called the "Circulation ratio". On the basis of the laws of error propagation, a strongly
rising error of the displayed differential value A-B results for the option "Differential measurement" at
values A/(A-B) >> 1, so that the value A/(A-B) can also be used to judge the reliability of a differential
measurement. For the case A/(A-B) >> 1, for example in the case of a deactivated consumer but with a
circulation pump that continues to be operated, a threshold value can be specified for A-B below which
the measured values are not taken into consideration for the sum calculation.
Averaging
A strongly fluctuating flow rate causes a jumping display or as a result a fluctuating analog output. The
averaging function reduces this effect by generating a averaging across several measured values. The
number of measured values for averaging can be set, see "3.06 Averaging analog output", Page 41, and
see "2.16 Averaging display rate", Page 39.
Limit value
The "Limit value bypass" function allows the automatic activation of a bypass valve when a volumeter
blocks. The bypass valve is actuated via Relay output 1, see "3.13 Function relay 1", Page 42.
Collective error message
When an error message occurs, Relay output 2 is switched for the collective error.

8 OIE 12en Edition 2019-02 Operating Instructions
Flow direction detection
Function description
Flow direction detection
In extreme cases the flow direction can change through pulsations, meaning through liquid waves in the
piping system. Through the use of two pick ups that supply signals out of phase by 90° (quadrature
encoder signals), a reversal in the flow direction is recognized by means of the flow direction sensor and
taken into account when calculating the total value.
The electronic unit offers incremental encoding inputs for each volumeter. This means that the flow
direction can be determined without additional components and taken into account in the calculation at
any time.
Batching
A simple filling function can be implemented with the KRAL electronic unit, see "1.07 Batch quantity",
Page 35. After the filling function has been started, Relay output 1 is activated when the specified
quantity is reached in order, for example, to close a valve that interrupts the filling process, see "3.13
Function relay 1", Page 42. The filling process can also be interrupted or aborted.
Electronic evaluation
The electronic unit receives signals from the sensors and calculates the measured values which are
indicated in the display unit and which can be called up at the analog output or at the bus interface.
Possibilities of the electronic unit:
□Language selection
□Display of the measured values in different units (volumes, masses and temperatures)
□Averaged display values
□Up to 2 density tables with 10 value pairs each that correspond to the fluid specifications
□Adaptation of the density tables if the analysis of the fluid requires other settings
□Density calculation
□Linearization table with up to 7 preset K-factors per volumeter
□Information message at faults or invalid inputs
□2 scalable and assignable analog outputs 0 - 10 V or 4 - 20 mA
□2 scalable and assignable pulse outputs 24 V
□2 adjustable relay outputs
Bus connection
The electronic unit can be connected to the plant by means of a Modbus interface and can thus be
integrated optimally into existing systems. This ensures that simple, reliable and rapid data exchange
can be implemented.

Operating Instructions OIE 12en Edition 2019-02 9
Applications of the KRAL electronic unit
Function description
Applications of the KRAL electronic unit
Different extension stages of the electronic unit are presented on the basis of the following examples.
This allows the required functional scope to be selected in accordance with the requirements.
Single-line measurement
Tab. 1 Extension stages single-line measurement
Extension stage Components Functions
Fig. 1 Basic
□1 Volumeter
□1 Pick up
□1 BEM 300 electronic unit
□Electronic evaluation
□Volume measurement
□1 Analog output
□1 Pulse output
Fig. 2 Basic +
Temperature
compensation
□1 Volumeter
□1 Pick up
□1 Temperature sensor Pt 100
□1 BEM 500 electronic unit
□Electronic evaluation
□Volume measurement
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
□Batching
Fig. 3 Basic +
Flow direction detection
□1 Volumeter
□2 Pick ups
□1 BEM 300 electronic unit
□Electronic evaluation
□Volume measurement
□Flow direction detection
□1 Analog output
□1 Pulse output
Fig. 4 Basic +
Flow direction detection +
Temperature
compensation
□1 Volumeter
□2 Pick ups
□1 Temperature sensor Pt 100
□1 BEM 500 electronic unit
□Electronic evaluation
□Volume measurement
□Flow direction detection
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
□Batching

10 OIE 12en Edition 2019-02 Operating Instructions
Applications of the KRAL electronic unit
Function description
Differential measurement
Tab. 2 Extension stages differential measurement
Extension stage Components Functions
Fig. 5 Basic
□2 Volumeters
□1 Pick up each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
Fig. 6 Basic +
Temperature
compensation
□2 Volumeters
□1 Pick up each
□1 Temperature sensor Pt 100
each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
Fig. 7 Basic +
Flow direction detection
□2 Volumeters
□2 Pick ups each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□Flow direction detection
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs
Fig. 8 Basic +
Flow direction detection +
Temperature
compensation
□2 Volumeters
□2 Pick ups each
□1 Temperature sensor Pt 100
each
□1 BEM 500 electronic unit
□Electronic evaluation
□Differential measurement
□Flow direction detection
□Mass flow measurement
□Temperature compensation
□2 Relay outputs
□2 Analog outputs
□2 Pulse outputs

Operating Instructions OIE 12en Edition 2019-02 11
Unpacking and checking the state of delivery
Transportation, storage and maintenance
Trans portation, stor age and ma intenance
Unpacking and checking the state of delivery
1. On delivery unpack the electronic unit and check for damage during transportation.
2. Report damage during transportation immediately to the manufacturer.
3. Dispose of packing material in accordance with the locally applicable regulations.
Transportation
►If possible, transport the electronic unit in the original packaging, while observing the ambient
conditions, see "Ambient conditions", Page 21.
Storage
►If possible, store the electronic unit in original packaging in a cool and dry place, while observing the
ambient conditions, see "Ambient conditions", Page 21.
Disposal
Safety instruction for disposal
Disposing of the electronic unit
►As electronic waste the electronic unit has to be disposed of properly.
Maintenance
The electronic unit is maintenance-free.
Cleaning
In order to clean the electronic unit wipe the housing with a soft cloth. In case of stronger soiling moisten
the cloth with water that has a common detergent added. Only wipe the surface off lightly with a moist
cloth. Under no circumstances may water penetrate the inside of the electronic unit!
The following safety instruction must be observed during disposal:
►Observe the local regulations on disposal.

12 OIE 12en Edition 2019-02 Operating Instructions
Safety instructions on installation, removal and connection
Installation and removal
Install ation and re moval
Safety instructions on installation, removal and connection
Installation
Dimensions
Scope of delivery
The following components belong to the scope of delivery of the electronic unit:
□Operating instructions
□Password
□Work sheet
□Mounting frame incl. screws and lock washers
□Terminal tool
□KRAL tool set
The following safety instructions must be observed:
□All installation and removal work may only be carried out by qualified personnel.
▪ Read the operating instructions and observe the relevant instructions.
□The electronic unit is a precision measuring device.
▪ Ensure cleanliness and take care during installation and removal.
▪ Do not take apart the electronic unit.
□The following qualifications are required for the electrical connection:
▪ Practical electrotechnical training
▪ Knowledge of the safety guidelines at the workplace
▪ Knowledge of the electrotechnical safety guidelines
Fig. 1 Dimensions of BEM 500 electronic unit
1Height:
2Width:
3Depth:
116 mm
116 mm
118 mm
1
2
3

Operating Instructions OIE 12en Edition 2019-02 13
Installation
Installation and removal
Installation in the control cabinet
The electronic unit can be mounted in control cabinets having a sheet thickness of 0.5 – 5 mm by using
the supplied mounting frame. The mounting frame consists of a front frame 2and a sealing frame 4, see
Fig. 2, page 13.
When the space is limited, mounting is also possible without a housing cover 6and seal with cable
entries 5, see Fig. 2, page 13.
An adapter set is available for converting BEM 4U to the electronic unit BEM 500, see "Adapter set for
conversion of BEM 4U to BEM 300/500", page 55.
Required minimum mounting depth: 80 mm
Dimensions of front frame:
□Height: 145 mm
□Width: 145 mm
□Depth: 12 mm
Aids:
□KRAL tool set
1Electronic unit
2Front frame
3Control cabinet
4Sealing frame
5Seal with cable
entries
6Housing cover
Fig. 2 BEM 500 control cabinet installation
a117 mm
b117 mm
Fig. 3 Control cabinet section
1
23
4
5
6
a
b

14 OIE 12en Edition 2019-02 Operating Instructions
Installation
Installation and removal
1. Create a control cabinet section, see Fig. 3, page 13.
2. When the space is limited, remove the housing cover 6and seal with cable entries 5.
3. Slide the front frame 2from behind onto the electronic unit 1.
4. Place the electronic unit with the front frame from the front into the control cabinet section,
see Fig. 3.
5. Slide the sealing frame 4from behind onto the electronic unit, whereby the sealing surface has to
point to the front.
6. Fasten the front frame and sealing frame using the 4 supplied screws and lock washers. Tighten the
screws carefully.
Tightening torque: 1 Nm
The electronic unit is ready for the connection of the cables.
Wall mounting
For wall mounting a universal mount is available as an accessory, see "Accessories mounting",
page 54.
Prerequisite:
□Universal mount is mounted to the wall
□All cables have been cut to length and connected
Aids
□KRAL tool set
1. Slide the electronic unit 1into the universal mount 2.
2. Fasten the electronic unit using the supplied screws, washers and wedge lock washers.
The electronic unit is ready to operate after the power supply has been switched on.
Pipe mounting/mounting on volumeter
The electronic unit can be mounted to the pipe or on the volumeter by means of the universal mount and
the corresponding fixing kit. The required fixing kit is available as an accessory, see "Accessories
mounting", page 54.
DANGER
Risk of death resulting from electric shock.
►Ensure that the power supply is disconnected.
►The electronic unit may only be connected by an authorized electrician.
1Electronic unit
2Universal mount
Fig. 4 Universal mount for wall mounting
1
2

Operating Instructions OIE 12en Edition 2019-02 15
Removal
Installation and removal
Prerequisite:
□All cables have been cut to length and connected
Aids
□KRAL tool set
1. Mount the universal mount 2on the fixing kit 3.
2. Mount the fixing kit including universal mount to the pipe/volumeter.
3. Slide the electronic unit into the universal mount.
4. Fasten the electronic unit using the supplied screws, washers and wedge lock washers.
The electronic unit is ready to operate after the power supply has been switched on.
Removal
Prerequisite:
□Power supply switched off
Aids:
□KRAL tool set
□Terminal tool
Removing the electronic unit from the control cabinet
1. Disconnect all the wires.
2. Unscrew the connecting screws between the front and sealing frames.
3. Pull of the sealing frame to the rear.
4. Pull the electronic unit with front frame from the front out of the control cabinet.
5. Press the front frame to the rear and pull it off the electronic unit.
Removing the electronic unit from the wall
1. Unscrew the connecting screws between the electronic unit and the universal mount.
2. Slide the electronic unit out of the universal mount.
Removing the electronic unit from the pipe/volumeter
1. Unscrew the connecting screws between the electronic unit and the universal mount.
2. Slide the electronic unit out of the universal mount.
Fig. 5 Fixing kit for pipe mounting /
KRAL Volumeter OMG series
Fig. 6 Fixing kit for KRAL Volumeter
OME series
1Electronic unit
2Universal mount
3Fixing kit pipe mounting/OMG
1Electronic unit
2Universal mount
3Fixing kit OME
1
2
3
1
2
3

16 OIE 12en Edition 2019-02 Operating Instructions
Termination panel of the electronic unit
Technical data
Techn ical da ta
Termination panel of the electronic unit
The bus is connected via terminals. The assignment of the terminals is shown in the wiring diagram. The
address of the electronic unit at the Modbus can be selected per software, see "3.19 Address Modbus",
page 44.
Fig. 1 Termination panel of the BEM 500 electronic unit
1Power supply 24 V DC
2Bus interface RS 485
3Serial interface RS 232
4Analog output 1 4–20 mA
5Analog output 2 4–20 mA
6Pick up A1
7Pick up B1
8Analog output 1 0–10 V
9Analog output 2 0–10 V
10 Pulse output 1 24 V
11 Pulse output 2 24 V
12 Temperature input A Pt100
13 Temperature input B Pt100
14 Pick up A2
15 Pick up B2
16 Relay output 1 bypass valve or filling valve
17 Relay output 2 collective error message
Pulse In B
1
2
3
4
5
6
7
8
9
10
11
-Pulse Output (1)
Pt 100 A
Pulse In A
-
+
Relay 1
12
13
14
15
16
17
18
19
+
RXD
24 VDC
A
B
RS485
+
-
4...20mA (1)
-
+
20
21
22
+
-
0...10 V (1)
NO
NC
23
24
TXD
RS232
25
26
27
28
29
30
31
32
33
+
-
4...20mA (2)
-
+
+
-
0...10 V (2)
34
35
36
37
38
39
40
41
-
Pulse Output (2)
-
+
42
43
44
Relay 2
NO
NC
Pt 100 B
-
-
-
Pick up A 2
Pick up A 1 Pick up B 1
Pick up B 2
10
12
14
16
1
2
4
6
8
5
3
7
9
11
13
15
17

Operating Instructions OIE 12en Edition 2019-02 17
Technical data of connections
Technical data
Technical data of connections
Power supply
Tension spring terminals
Pulse and temperature inputs
Analog, pulse and relay outputs
Designation Data
Power supply □Range 24 V DC ± 20%
Max. current consumption □0.5 A
Insulation voltage □< 500 V
Cable type Terminating range
Strand □0.08 – 2.5 mm
2
Litz wires □0.08 – 2.5 mm
2
Wire end ferrule □0.25 – 1.5 mm
2
Component Data
Pulse inputs □Minimum limit frequency 0.3 Hz
□Maximum limit frequency 20 kHz
□Power supply for pick up 24 V DC or Namur 8.2 V
□Input impedance
▪ Namur: 1 kΩ
▪ 24 V DC: 3.2 kΩ
□Switching threshold/hysteresis
▪ Namur: 1.65 V/0.2 V
▪ PNP or NPN: 4.5 V/0.2 V
□Can be configured for counter or encoder mode
□Minimum chronological phase shift for direction detection in
encoder mode: 0.2 µs
Temperature inputs □Three-wire Pt100
□Range -40 °C...+200 °C
□Resolution: 0.1 °C
Component Data
Analog outputs 4–20 mA □Active current sources
□Short-circuit proof
□Load < 500 Ω
□Electrical isolation: 500 V
eff
□Resolution: 1 µA
□Scalable
□Temperature drift: ± 0.1%
□Calibration tolerance: ± 0.1%
□Reaction time: 20 ms x smoothing value

18 OIE 12en Edition 2019-02 Operating Instructions
Technical data of connections
Technical data
Display
Modbus interface
Analog outputs 0–10 V □Active voltage sources
□Short-circuit proof
□Load > 500 Ω
□Resolution: 1 mV
□Scalable
□Temperature drift: ± 0.1%
□Calibration tolerance: ± 0.1%
□Reaction time: 20 ms x smoothing value
Pulse outputs □Active pulse sources (PNP transistor switches power supply)
□Maximum output current: 20 mA
□Short-circuit proof
□Load > 1 kΩ
□Scalable
□Signal level at 24 V DC power supply:
▪ High > 20 V DC
▪ Low < 1 V DC
□Flow direction detection in the "Encoder" mode possible
□Pulse width (high) adjustable from 2–200 ms
□Max. output frequency at pulse width 2 ms:
▪ Mode "Independent": 250 Hz
▪ Mode "Encoder": 125 Hz
Relay outputs □Potential-free change-over contact
□Nominal load voltage: 250 V AC/30 V DC
□Switching current, ohmic: 6 A AC/DC
□Switching current, inductive: 2 A AC/DC
□Fuse protection by customer required
□Switching time: max. 8 ms
□Switching cycles: min. 30 000
Designation Data
Text display □4 lines/20 characters
Updating rate □100 ms
Background illumination □10 levels, can be adjusted via software
Contrast □10 levels, can be adjusted via software
Language selection □German
□English
□French
□Spanish
Designation Data
Interface type □RS 232 (SLAVE)
□RS 485 (SLAVE)
Baud rate □9600 bauds
Data format □8N1 (8 data bit, no parity, 1 stop bit)
Protocol □Modbus RTU
Processor cycle time □20 ms
Component Data

Operating Instructions OIE 12en Edition 2019-02 19
Technical data of connections
Technical data
The following variables are available at the Modbus:
Tab. 1 Variables at the Modbus
Notice: The display values in menus 1.01 to 1.06 are signed 32 bit integer values. With double words,
the most significant word is always sent first.
Tab. 2 Data values unit rate
Tab. 3 Data values unit total
Menu no.
Variable designation
Data address in HEX No. of words Decimal places
Data
value range
Explanation of
data value
Data reading command
to BEM in HEX
1.01 Consumption rate Q 4000 2 1...3 +/- 2147483647 Unit rate 0103 4000 0002 D1CB
1.02 Total 1 4002 2 1...3 +/- 2000000000 Unit total 0103 4002 0002 700B
Total 2 4004 2 1...3 +/- 2000000000 Unit total 0103 4004 0002 900A
1.03 Volumeter A rate QA 4006 2 1...3 +/- 2147483647 Unit rate 0103 4006 0002 31CA
Volumeter A temp. tA 4008 2 1 -400...3920 Unit temp. 0103 4008 0002 5009
1.04 Volumeter A total TA1 4100 2 1...3 +/- 2 000 000 000 Unit total 0103 4100 0002 D037
Volumeter A total TA2 4102 2 1...3 +/- 2 000 000 000 Unit total 0103 4102 0002 71F7
1.05 Volumeter B rate QB 400C 2 1...3 +/- 2147483647 Unit rate 0103 400C 0002 11C8
Volumeter B temp. tB 400E 2 1 -400...3920 Unit temp. 0103 400E 0002 B008
1.06 Volumeter B total TB1 4104 2 1...3 +/- 2 000 000 000 Unit total 0103 4104 0002 91F6
Volumeter B total TB2 4106 2 1...3 +/- 2 000 000 000 Unit total 0103 4106 0002 3036
2.05 Unit rate 4016 1 0 1...23 see Tab. 2,
page 19
0103 4016 0001 700E
2.06 Unit total 4015 1 0 1...9 see Tab. 3,
page 19
0103 4015 0001 800E
2.07 Unit temperature 4017 1 0 1...2 see Tab. 4,
page 20
0103 4017 0001 21CE
2.10 No. of decimal places 4186 1 0 1...3 see Tab. 5,
page 20
0103 4186 0001 71DF
Value Meaning Value Meaning Value Meaning
1 l/sec 9 lb/sec 17 galUK/h
2 l/min 10 lb/min 18 m³/min
3 l/h 11 lb/h 19 m³/h
4 kg/sec 12 galUS/sec 20 g/sec
5 kg/min 13 galUS/min 21 g/min
6 kg/h 14 galUS/h 22 ml/sec
7 t/min 15 galUK/sec 23 ml/min
8 t/h 16 galUK/min
Value Meaning Value Meaning Value Meaning
1 l 4 lb 7 m³
2 kg 5 galUS 8 g
3 t 6 galUK 9 ml

20 OIE 12en Edition 2019-02 Operating Instructions
Technical data of connections
Technical data
Tab. 4 Data values unit temperature
Tab. 5 Data values number of decimal places
Example for Total TA1:
Data reading command to BEM (query): 0103 4100 0002 D037
Response from BEM: 0103 0400 0160 9E02 5B
Tab. 6 Example for Total TA1
If the value of a data query for data address 4186 = 2 (see Tab. 5, page 20), the Modbus value must be
divided by 100. The result is then 902.7.
If the value of a data query for data address 4015 = 5 (see Tab. 3, page 19), the unit is total galUS. The
end result for Total TA1 is therefore 902.7 galUS.
Notice: Because data addresses begin with 0 and register addresses with 1, when determining the
register address the value 1 must always be added, e.g. data address 4000 = register address 4001.
Notice: All units and the number of decimal places (menu no. 2.05 to 2.10, see Tab. 1, page 19) should
be read out at least during initialization of the evaluation device, i.e. during switch-on, because these
values can also be manually modified.
Notice: For parameter settings of the BEM with the Modbus, Modbus function 10 can be used: 10 (hex)
= write holding register (preset multiple register).
Data exchange via the bus connection is not password-protected. Avoid unintended overwriting of the
total or parameter addresses!
Notice: All data can be read out or written in packages of up to 64 words.
Resetting of the total values via the Modbus:
Command reset Total consumption T1: 0110 4002 0002 0400 0000 0043 B5
Command reset Total consumption T2: 0110 4004 0002 0400 0000 00C3 9F
Value Meaning Value Meaning Value Meaning
1 °C 2 °F
Value Meaning
1 1 decimal place, meaning all values with 1...3 decimal places must be divided by 10
(101) to get the actual value.
2 2 decimal places, meaning all values with 1...3 decimal places must be divided by 100
(102) to get the actual value.
3 3 decimal places, meaning all values with 1...3 decimal places must be divided by 1000
(103) to get the actual value.
Value Meaning
0103 0400 0160 9E... 01 = Modbus address 1
0103 0400 0160 9E... 03 = Read holding registers function
0103 0400 0160 9E... 04 = Response of BEM consists of 4 bytes:
00 0160 9E 1. Data byte 0 * 228 + 0 * 224 = 0
00 0160 9E
2. Data byte 0 * 220 + 1 * 216 = 65 536
00 0160 9E 3. Data byte 6 * 212 + 0 * 28= 24 576
00 0160 9E 4. Data bite 9 * 24+ 14 * 20= 158
=> The Modbus value therefore corresponds to the total 90 270