Direct Current Billing Meter DCBM series Imax = 80 A
Ref: DCBM 100

DCBM 100 series is a direct connected energy meter dedicated to DC applications. The
range of operating currents and operating temperatures offered by the DCBM 100 series
facilitate integration and meet the specific constraints of electric vehicle charging systems.
The DCBM 100 series offers a power loss compensation system, and is particularly suited for
DC Wallbox charging Electric Vehicles. The product offers HTTP communication with a full set ofAPIs for quick start-up and easy integration, and OCMF format compliant with S.A.F.E verification
software.

Features● Voltage measurement 150 … 1000 V DC
● Current range 80 A
● Bi-directional energy metering● Accuracy Class B, −40 °C to +80 °C● Cable loss compensation● Ethernet communication with HTTP
● Signed data readouts in OCMF
● Monitoring of Status/ current / voltage / temperature /energyApplications● Electric Vehicle Charging infrastructures● Data centers● DC grids & Energy Monitoring● Energy storage, renewables.

Standards● EN 50470-1: 2006
● EN 50470-3: 2006
● PTB-A 50.7

● Integrated high contrast display● PTB-A 20.1● Transaction handling with start & stop tags, user data fields
tariff identification, and authentication● CISPR32 Class-B emission● Directive 2014/32/EU (MID)● Auxiliary power supply range +12 ... +24 V DC

● IEC 62052-11: 2003

● DIN rail 35 mm and screw mounting● IEC 61000-6-2: 2016

● Sealing of terminals and interfaces.

● IEC 61000-6-3: 2016

Advantages● UL94-V0● OpenAPI for easy integration into systems● IEC 62052-31:2014.

● Flexible integration with cables

Application Domains● OCMF readouts compliant with S.A.F.E● Industrial● Compliant for energy billing or parking time billing● Renewable energies.

● MessEV and MID approved● System monitoring.

N° 97.W1.31.000.0; 97.W1.31.001.0; 97.W1.31.002.0 ; 97.W1.31.003.0; 97.W1.31.004.0; 97.W1.31.005.0; 97.W1.31.200.0; 97.W1.31.201.0; 97.W1.31.202.0; 97.W1.31.203.0; 97.W1.31.204.0
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DCBM 100 series
Operating conditions
MeterParameter

SymbolUnitMin

Ambient operating temperature

TA°C−40+80

Ambient storage temperature

TA st°C−40+80Relative humidity

RH%

95

Massmg317

TypMax

Impact rating

IK05

Ingress protection rating

IP20

Comment±10 %According to IEC 62262

Insulation coordination
Parameter

Symbol

Unit

Value

Pollution degreePD2

Rated altitude

m3000

V DC

1000

Rated insulation voltage
Case material

V0

Insulation between live parts and accessible parts- Insulation type
- Overvoltage category- Impulse withstand voltage

UNikV- RMS voltage for AC insulation test (5s)

UdkVCommentAccording to UL 94Overvoltage limitation ensured
Reinforced by charging station, according toIEC61851-23:2014, §11.4.101
IIInsulation between SELV and HV
5.96
3.24

100 % tested in production

BasicInsulation between VP and VN

Insulation between voltage terminals- Insulation type
- Impulse withstand voltage

UNi

kV

3.75

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DCBM 100 series
General electrical specifications
MeterParameter

SymbolUnitMin

Supply voltage

UCV DC+12+24

Supply current

ICmA

3080Supply bridging time

ms30

Start-up time 1)s

Energy reserve charging time 2)

sNotes:1)

TypMaxComment±5 %MIN @ +24 V DC/−40 °C
Max @ +12 V DC/+80 °C
Without going in power fail state10@ +24 V DC

3

Start-up time is the wait to get communication functionality over the HTTP inerface after power is restored.

Energy reserve charging time is the wait to get supply bridging capabilities. Power supply must be stable during this period. Product must be		 powered-up at nominal voltage during this time before starting a transaction. It is further recommended not to switch on the product for less		 than the Energy reserve charging time.
2)

Definition of typical, minimum and maximum values
Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values shownin “typical” graphs.
On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower
limits and a probability for measured values to lie within this interval.
Unless otherwise stated (e.g. “100 % tested”), the LEM definition for such intervals designated with “min” and “max” is that theprobability for values of samples to lie in this interval is 99.73 %.
For a normal (Gaussian) distribution, this corresponds to an interval between −3 sigma and +3 sigma. If “typical” values are notobviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to aninterval between −sigma and +sigma for a normal distribution.
Typical, maximal and minimal values are determined during the initial characterization of the product.

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LEM International SA
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DCBM 100 series
Energy measurement and accuracy
Parameter

SymbolUnit

Accuracy class

DCBM 100B
Direct connectedmeter

Meter type
Energy measurement bandwith

CommentAccording toEN 50470-3: 2006 andEN 50470-1: 2006

DCCurrent specification- Starting current

IstmA64- Minimum current

Imin

A

0.8

- Transitional current

ItrA

1.6

- Reference current

Iref

A

16

- Maximum current

ImaxA80- Range voltage

Uref

V DC150 ... 1000

- Maximum limit range of operationUmaxV DC1100

UminV DC

135mΩ

0-35

Imp/kWh

10 000

Voltage specification- Minimum limit range of operation

Cable loss compensation 2)

Test Output LED 3)

1)

Counting direction
Notes:

Bidirectional

By steps of 5 mΩ, imported and exportedenergy. Selectable by charging station or fix
value (see product desigation)

Imported and exported energy registers

Creep mode is enabled if DC bus voltages goes below 110 V DC.
Depending on product reference, fix or dynamic cable loss compensation is available, refer to product’s name and codification to select		 cable loss compensation type. With dynamic compensation, the value is selected between 0-35 mΩ (by step of 5 mΩ) at start of transaction.		 With fix compensation, the value is locked to the fix value. Cable loss compensation is enabled only during a transaction (between start and		 stop tags), outside of a transaction no compensation is applied.
3)
After reboot, the test output LED is lit as long as the creep mode conditions are met.
1)
2)

Connection and terminals
Meter
Parameter
Ethernet interface

Value

Comment

RJ45

Power supply terminal- Type

Screw terminal- Rated cross section

0.14 - 1.5 mm2- Maximum tightening torque

0.6 N⋅mPage 4/7
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LEM International SA
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DCBM 100 series
Interfaces and communication
ParameterValue

Display technology

OLED

Ethernet interface

HTTP

IP settings

REST APIs with Json content

Static IP / DHCP

System monitoring

Status/Current / Voltage /Temperature / Power / Energy

Readout data format

OCMF

Data authenticity

Comment

at 10 Hz refresh rate
OCMF format compliant with S.A.F.E. transparency
software

Asymetric cryptography withpublic key
50

Ackonwledgment of backend save mandatory forauthorizing new transactions

204000

New transactions are blocked when logbook is fullTime synchronization

SNTP / from API

Time synchronization with SNTP service, or set withthe "/setting" APITransaction status LED

Active during transaction

Number of transactions storedLogbook entries

a power failure is stoping, signing and saving atransaction

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DCBM 100 series
Meter dimensions

A 56 mm (±0.2)
B 123 mm (±0.2)

AC 112 mm (±0.2)

D 60 mm (±0.2)
E3.7 mmF 4.7 mm

BG 4 x M4 screws with internal drive

G(torque max 2 N.m)
4 x M4 Schrauben mit Innenantrieb(Drehmoment 2 N.m)
4 x Vis M4 à entraînement intérieur(couple max 2 N.m)
H 101.5 mm (±0.2)
I 103.5 mm (±0.2)

GHICGGDFEPage 6/7
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DCBM 100 series
Description and Codification
All codifications included in DC Meter are.
For example, DCBM_N0M_0800W00_0000C0 codification includes the following elements:

Below table summarizes the codifications for generic products.
For other references, minimum quantities apply, please contact your local LEM support.
Codification
DCBM_N00_0800W00_0000C00
DCBM_N00_0810W00_0000C00
DCBM_N0M_0800W00_0000C00
DCBM_N1M_0800W00_0000C00
DCBM_N0M_0810W00_0000C00
DCBM_N1M_0810W00_0000C00

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LEM International SA
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