DCBM Series
Direct Current Billing Meter

DCBM
Direct Current Billing Meter

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Direct Current Billing Meter

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DCBM
Direct Current Billing Meter
Market needs:•DC Charging Stations for EVs’ must implement a DC
meter certified, compliant with “Eichrecht”, meaning“German metrology legislation“•Losses due to AC DC conversion should not be paid byEV owners. DC meter ensures the measure of DC energy•••

Senor Unit measures the current, the voltage andinsulates measures to send them to the Meter Unit.
Two versions are available, 400Amax or 600Amax
Cable transmits data from the Sensor Unit to theMeter Unit. The cable is robust for an external
environment up to 1000 VDC conditions
Meter Unit is the heart of the DC meter. It receives
external data (IDs, Time,…) coming from the charger
controller, receives measures coming from theSensor Unit, combines data, signes data andtransmits all the data package to the charger
controller via an Ethernet communication

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Direct Current Billing MeterKey features•••••••••••••••••••

Split module concept, very compact
Cable lengths between Meter Unit and Sensor Unit: 30cm to 3.5m
DCBM 400
Ist 320mA, Imin 4A, Itr 8A, Imax 400A
DCBM 600
Ist 480mA, Imin 6A, Itr 12A, Imax 600A
Voltage measurement from 150V to 1150V
Bi-directional meter
Charging cable resistance compensation managed by DCBMClass Accuracy B
Supply voltage: 12V DC to 24V DC
Meter Unit operating temperature range: -25°C to 70°CSensor Unit operating temperature range: -40°C to 85°C
Maximum Bus-bar operating temperature: 105°CIP 20 rating
Instantaneous data provided with a refresh rate at 1Hz, Current, Voltage,temperature, Energy positive and negative
Ethernet communication with HTTPS/REST protocol, NTP time synchronization
Fixe ip address or DHCP protocol
Data encapsulated with OCMF protocol (SAFE, Software Alliance For Emobility) and signed data
Rated insulation voltage at 1000VDC, Reinforced
Certified DC meter compliant with VDE-AR-E-2418-3-100

DCBM productSensor Unit

Meter Unit

Cable

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DCBM
Direct Current Billing MeterQUICK & EASY

ROBUST

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DCBM
Direct Current Billing Meter

1 Meter solution

2 Certification

3 Billing is allowed

Conformity Assessment
Approval
MODULE BTests
MODULE F

Baumusterprüfbescheinigung

Eichung€, USD, CHF

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DCBM
Direct Current Billing Meter
Counter incremented by every
read access to guarantee unicity{"paginationCounter": 2,"transactionId": "demo1234","evseId": "+49*DEF*E123ABC","clientId": "12","tariffId": 0,"cableSp": {"cableSpName": "0 mohm","cableSpId": 0,"cableSpRes": 0},"userData": "","meterValue": {"timestampStart": "2019-12-11T17:17:04+01:00","timestampStop": "2019-12-11T17:17:20+01:00","transactionDuration": 16,"intermediateRead": false,"transactionStatus": 25,"sampleValue": {"energyUnit": "kWh","energyImport": 1.709,"energyImportTotalStart": 1183.060,"energyImportTotalStop": 1184.769,"energyExport": 0.000,"energyExportTotalStart": 0.000,"energyExportTotalStop": 0.000}},"meterId": "MU_ID_123456","signature": "3046022100E829A3CE0F053A6023C6B677A9B4A0AF8D34385E6E8DA3EBB8CDB0D295F5DC4A022100831172 ","publicKey": "C47DDE84F44D86D273A370B4EBCAAF6384B528B4E0A1F7583EC9C1264EBFEA89B2B13CF747C6DABD20039 "Copy of the IDs (see start command)

Selected by cableId

Transaction readings and status

Data needed for signature verification

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DCBM
Direct Current Billing Meter

Compensation function
Power charging cable losses

DCBM covers all compensation cases• Dynamic• Fix compensation• No compensation
Via software

Charging cable, between charger and EV,
generates power losses due to his own resistance.
DCBM integrates the compensation function

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Thank you
Please contact us: https://www.lem.com/en/form/contact-us
LEM International SA
Chemin des Aulx 8,
P.O Box 35
CH1228 Plan les Ouates
Tel: +41 22 706 11 11
Fax +41 22 794 94 78

www.lem.com

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