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Operating instructions

KRAL display and processing unit

BEM 300

SW 2.004

OIE 15en-GB
Edition 2020-03
Original instructions

www.kral.at

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Summary of Contents for BEM 300

Page 1: ...Operating instructions KRAL display and processing unit BEM 300 SW 2 004 OIE 15en GB Edition 2020 03 Original instructions www kral at ...

Page 2: ...onnection 14 7 1 Dangers during connection work 14 7 2 Connecting cables to the tension spring terminals 14 7 3 Connecting the pick up 15 7 4 Connecting analog outputs and pulse inputs 15 7 5 Connecting the power supply 16 8 Commissioning 16 8 1 Checking the electronic unit 16 9 Decommissioning 17 9 1 Taking the electronic unit out of operation 17 10 Operation 17 10 1 Abbreviations units and signa...

Page 3: ...ately at the beginning of the indi vidual chapters in these instructions The following table provides an overview Target group Activity Qualification Fitter Mounting connection Qualified personnel for mounting Electrician Electrical connection Qualified personnel for electric installation Trained personnel Delegated task Personnel trained by the operator owner who know the task delegated to them a...

Page 4: ...age with a KRAL flowmeter o Use the electronic unit only within the operating limits specified in the Technical data chapter 2 2 Foreseeable misuse o Any use that extends beyond the proper use or any other use is misuse 2 3 Fundamental safety instructions The following safety instructions must be observed o Read the operating instructions carefully and observe them o Have work only carried out by ...

Page 5: ...llumination 20 levels can be adjusted via software or analog input Contrast 20 levels can be adjusted via software Language selection o German o English o French o Spanish 3 3 Connection data 3 3 1 Power supply Parameter Unit Value Power supply V DC 24 20 Max current consumption mA 0 5 Insulation voltage V 500 3 3 2 Tension spring terminals Cable type Unit Terminating range Strand mm2 0 08 2 5 Lit...

Page 6: ...ation tolerance 0 1 Reaction time 0 15 s x smoothing value Analog output 0 10 V Active voltage source Short circuit proof Scalable Load Ω 500 Resolution mV 1 Temperature drift 0 1 Calibration tolerance 0 1 Reaction time 0 15 s x smoothing value Pulse output Active pulse sources PNP transistor switches power supply Output current max mA 20 Short circuit proof Load kΩ 1 Scalable Signal level at 24 V...

Page 7: ...interface RS 232 9 Pulse output 5 Modbus interface RS 485 The Modbus connection takes place via terminals The assignment of the terminals is shown in the wir ing diagram The address of the electronic unit at the Modbus can be selected per software see 2 10 Modbus address 3 5 Pin assignment Component Connection function Terminal Pick up NPN PNP Push pull Namur Pick up 1 U 24 V DC U 8 2 V DC 12 Sign...

Page 8: ... interference EN 61326 Vibration o EN 60068 2 47 o EN 60068 2 64 Shock EN 61373 Isolation min V 500 Degree of protection IP 65 Tab 4 Ambient conditions 3 7 Accessories Notice The technical data of the accessories are specified separately Ä Accessories Page 26 4 Function description 4 1 Functional principle 4 1 1 Usage The electronic unit is provided for usage with a KRAL flowmeter Flowmeters gener...

Page 9: ...f the flow direction sensor and taken into account when calculating the total value The electronic unit offers incremental encoding inputs for each flowmeter This means that the flow direction can be determined without additional components and taken into account in the calculation at any time 4 1 6 Electronic evaluation The electronic unit receives signals from the pick ups and calculates the mea...

Page 10: ...ensation o 2 relay outputs o 2 analog outputs o 2 pulse outputs o Filling Tab 5 Extension stages single line measurement Notice The BEM 500 electronic unit can also be used for two separate single line measurements Differential measurement Extension stage Components Functions 000139 Basic o 2 flowmeters o 1 pick up each o 1 BEM 500 electronic unit o Electronic evaluation o Differential measurement...

Page 11: ...4020 1 0 65 535 3 0103 4020 0001 9000 Hardware 410A 1 0 65 535 3 0103 410A 0001 B034 Tab 7 Modbus variables Data value Value Meaning Value Meaning Value Meaning Unit rate 1 l sec 9 lb sec 17 galUK h 2 l min 10 lb min 18 m min 3 l h 11 lb h 19 m 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 Unit total 1 ...

Page 12: ...hange via the Modbus connection is not password protec ted avoid unintended overwriting of the total values or parameter addresses Notice All data can be read out or written in packages of up to 64 words Reset of the total values via the Modbus o Reset command Total T1 0110 4100 0002 0400 0000 00CF FC o Reset command Total T2 0110 4102 0002 0400 0000 004E 25 5 Transportation storage 5 1 Scope of d...

Page 13: ...e front 6 Fasten the front frame 2 and sealing frame 4 using the 4 supplied screws and wedge lock wash ers Carefully tighten with 1 Nm torque ð The electronic unit is ready for the connection of the cables 6 3 Mounting the electronic unit to the wall Personnel qualification o Electrician Personal protective equipment o Work clothing Aids o KRAL tool set For wall mounting a universal mount is avail...

Page 14: ...nit using the supplied screws washers and wedge lock washers ð The electronic unit is ready to operate after the power supply has been switched on 7 Connection 7 1 Dangers during connection work The following safety instructions must be strictly observed o Have all work only carried out by electricians o The connecting lines of the sensor connections are to be shielded and laid separately from the...

Page 15: ...ge through incorrect connection Observe pin assignment and connection data of the electronic unit Ä Technical data Page 5 Before connecting the electronic unit to the power supply ensure that all consumers sensors are connected correctly See the wiring plan Requirement ü Pick up for flowmeter installed 1 Remove the rear device cover 2 Use the diagonal cutter to adapt the cable entry to the cable d...

Page 16: ...ply ensure that all consumers sensors are connected correctly See the wiring plan Requirement ü All sensors correctly connected ü System in a deenergized state and secured against being switched on 1 Remove the rear device cover 2 Use the diagonal cutter to adapt the cable entry to the cable diameter 3 Pull the supply cable 24 V DC through the cable entry and connect 4 Replace the rear device cove...

Page 17: ...viations Abbreviation Meaning Qnom Nominal flow rate QA Current flow flowmeter A A1 Total flow flowmeter A since last reset without password protection A2 Total flow flowmeter A since last reset with password protection Rho Density f Frequency K K factor 10 1 2 Units In order to make extensive conversions by the user superfluous various country specific units and quantities of a unit are available...

Page 18: ...wing table describes the entry of the password as well as general operating steps such as the changing of values and units The password is included in the scope of delivery and consists of four di gits Aim Operating steps Enter the password see 2 01 Setting Enable Password Deactivate password protection 1 Press ð The password prompt is displayed ð Flashing cursor indicates the active input field 2...

Page 19: ... part without a pass word having to be entered Aim Operating steps Read the load see 1 01 Display Volumeter A Call up menu item Press simultaneously Reset sum see 1 02 Display Volumeter A Total Reset of the total values 1 Press ð Total value 1 is selected 2 Press for three seconds ð Total value 1 is reset 3 Press ð Total value 2 is selected 4 Press for three seconds ð Entry of password required 5 ...

Page 20: ...tting Display Brightness o 1 06 Setting Display Contrast o 1 07 Setting select language o 1 12 Help operation o 1 13 Enter Password 2 Settings o 2 01 Setting Enable Password o 2 02 Setting Select Unit Rate o 2 03 Setting Select Unit Total o 2 04 Setting Select Unit Density o 2 05 Setting Function Analog Output o 2 06 Setting Scale Analog Output 1 o 2 07 Setting Averaging Analog Average o 2 08 Sett...

Page 21: ...Page 24 1 03 Display Reset Group Error Message Reset the group error message after eliminating the cause for the activation of the group error mes sage 1 04 Information Shows serial number software version and hardware version 1 05 Setting Display Brightness Adjusting the brightness of the display 1 06 Setting Display Contrast Adjusting the contrast of the display 1 07 Setting select language Sele...

Page 22: ... the averaging value than the new measured value Averaging of the display is also active on the Modbus 2 08 Setting Scale Pulse Output 1 The scale of the pulse output is used to set the pulse significance Since the pulse values can also be output in packets the manufacturer recommends using the pulse output only for total values Select the scale so that the limit frequency of 250 125 Hz is not exc...

Page 23: ...ithout decimal place is not possible 11 6 Menu 3 K factors flowmeter A o Entering the resulting K factor into the flowmeter o K factors associated frequencies and resulting K factor see calibration certificate of the flowmeter o Resulting K factor also see rating plate of the flowmeter o Changes only possible with password o Ä Operation Page 17 Menu item Description 3 01 K factor Volumeter A Point...

Page 24: ...ult messages as well as their cause and remedy Alarms Fault display Cause and elimination 7 01 No alarm The electronic unit works without problems There is no fault 7 07 Alarm 6 maximum flow is exceeded Check the volumeter The maximum permissible flow rate was exceeded in a flowmeter o Limit the flow rate o Check the flowmeter o Use a larger size 7 09 Alarm 8 analog output scaling max ex ceeded Th...

Page 25: ...og output function selected incorrectly o Select the correct function see 2 05 Setting Function Analog Output Signal cable connected to an incorrect analog output o Correct the connection Negative flow The signal wires at the respective flowmeter are connected incorrectly o Swap the signal wires No flow or flow rate too low o Check the alarms see Menu 7 Alarms o Check the connection of the pick up...

Page 26: ...low o Reduce the number of decimal places 15 Accessories 15 1 Installation 15 1 1 Fixing kits The electronic unit can be installed by various methods In addition to the mounting frame that forms part of the scope of delivery diverse fixing kits for mounting the electronic unit are available as ac cessories 15 1 2 Universal mount fixing kit Fixing kit Application Article No Suitable for Wall mounti...

Page 27: ...ot suitable for OME with DIN flanges 2 Not suitable for OME with temperature sensor connection 15 1 5 Adapter set for conversion of BEM 4U to BEM 300 BEM 500 Adapter set Application Article No Suitable for o Mounting in the control cabinet o Conversion of BEM 4U to BEM 300 BEM 500 EGT 23 BEM 300 BEM 500 Scope of delivery o 1 sheeting bonded to seal o 1 sheeting Change BEM 4U to BEM 500 Notice The ...

Page 28: ... Electrical connection 15 2 1 Different voltage The electronic unit operates with a power supply of 24 V DC If a deviating voltage is available in the system a suitable power supply unit can be used 15 2 2 Rack mounting power supply unit EEN 12 Fig 4 Rack mounting power supply unit EEN 12 Component Parameter Unit Value Input Input voltage V AC Hz V DC o 100 240 tolerance 93 265 o 47 63 o 135 370 S...

Page 29: ...erating temperature C 25 60 above 50 C performance reduc tion 1 5 C Cooling Air convection Electrical safety Design to EN 60950 Degree of protection IP 20 Insulation voltage input output kV 3 routine tested EMC emitted interference EN 55011 B EMC immunity to interference EN 61000 6 2 Efficiency 83 depending on input voltage and output voltage Connections Screw terminals pluggable mm2 o Input 0 5 2...

Page 30: ... Appendix 16 1 Glossary Designation Meaning Updating rate o Shortest period in which a change is displayed in the display Analog output o Represents an internal digital value as an electrical value 0 10 V 4 20 mA o Is updated with the cycle time Analog input o Converts an electrical value 0 10 V 4 20 mA into a digital value Resolution o Maximum number of possible subdivision steps for describing a...

Page 31: ...it Linearity o Dependence of the K factor across the flow range Mass calculation o Volumetric values are converted into mass values under consideration of the temperature by means of the density table Modbus connection o Digital communication with connected users Modbus interface o Makes available the hardware e g RS 232 and software e g Modbus RTU protocol required for digital communication Rate ...

Page 32: ...KRAL GmbH 6890 Lustenau Austria Tel 43 5577 86644 0 E Mail kral kral at www kral at ...

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