Direct Current Billing Meter - DCBM 400/600 Series
Ref: DCBM 400, DCBM 600

DCBM 400/600 series is a direct connected energy meter dedicated to DC applications. The
partitioned concept, operating currents and operating temperature range offered by DCBM
400/600 series ease integration, meet the specific constraints of electric vehicle charging
systems and meet legal metrology requirements. DCBM 400/600 series offers power loss
compensation system and 4-wire connection possibilities to measure energy as close as
possible to the electric vehicle. The product also offers OCMF format compliant with S.A.F.E
verification software and HTTP communication with a full set of APIs for quick start-up and easy
integration.

Features● Split concept for easy integration● Range of operation 150 … 1000 V DC
● Two sizes: Imax 400 A and Imax 600 A● Wide current terminals, compliant with busbars● Bi-directional energy metering (V2G)● Accuracy Class B, −40 °C to +85 °C● Compliant with 4-wire measurement● Cable loss compensation● Ethernet communication with HTTP/HTTPS● Signed data readouts in OCMF or LEM format● Monitoring of current / voltage / temperature / energy● Integrated display with backlight● Transaction handling with start & stop tags, user data fields
and authentication● Auxiliary power supply range +12 ... +48 V DC
● DIN rail 35 mm and screw mounting● Length of Datalink cable from 30 cm up to 3.5 m

Applications● 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
● PTB-A 20.1
● CISPR32 Class-B emission● Directive 2014/32/EU (MID)● Regulation n° 22.00.570.001.1 (France)● IEC 62052-11: 2003
● IEC 61000-6-2: 2016
● IEC 61000-6-3: 2016
● UL94-V0● Reinforced insulation at 1000 V DC, UNi 8 kV

● UL 61010-1: 2012/A1:2019.

● Sealing of terminals and interfaces .

● UL 61010-2-030:2018.

Advantages

Application Domains● Easy integration into systems● Flexible integration with busbars or cables● Industrial● Renewable energies.

● OCMF readouts compliant with S.A.F.E● Compliant for energy billing or parking time billing● PTB, MID, LNE approved, UL recognized.
List of CLEM datasheets'numbers: see page 2

10July2024/Version 4

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

Page 1/13

DCBM 400/600 series
CLEM datasheets'numbers
CLEM N°

Product name97.W1.48.000.0

DCBM_N0D_4000C20_0000C00

97.W1.52.000.0

DCBM_N0D_6000C20_0000C00

97.W1.48.001.0

DCBM_N0D_4010C20_0000C00

97.W1.52.001.0

DCBM_N0D_6010C20_0000C00

97.W1.48.002.0

DCBM_N0D_4000C03_0000C00

97.W1.52.002.0

DCBM_N0D_6000C15_0000C00

97.W1.48.003.0

DCBM_N0D_4000C15_0000C00

97.W1.52.003.0

DCBM_N0D_6010C15_0000C00

97.W1.48.004.0

DCBM_N0D_4010C03_0000C00

97.W1.52.004.0

DCBM_N0D_6000C25_0000C00

97.W1.48.005.0

DCBM_N0D_4010C15_0000C00

97.W1.52.005.0

DCBM_N1D_6000C20_0000C00

97.W1.48.006.0

DCBM_N0D_4000C35_0000C00

97.W1.52.006.0

DCBM_N2D_6000C20_0000C00

97.W1.48.007.0

DCBM_N1D_4000C20_0000C00

97.W1.52.007.0

DCBM_N3D_6000C20_0000C00

97.W1.48.008.0

DCBM_N2D_4000C20_0000C00

97.W1.52.008.0

DCBM_N4D_6000C20_0000C00

97.W1.48.009.0

DCBM_N3D_4000C20_0000C00

97.W1.52.009.0

DCBM_N1D_6010C20_0000C00

97.W1.48.010.0

DCBM_N4D_4000C20_0000C00

97.W1.52.010.0

DCBM_N2D_6010C20_0000C00

97.W1.48.011.0

DCBM_N1D_4010C20_0000C00

97.W1.52.011.0

DCBM_N3D_6010C20_0000C00

97.W1.48.012.0

DCBM_N2D_4010C20_0000C00

97.W1.52.012.0

DCBM_N4D_6010C20_0000C00

97.W1.48.013.0

DCBM_N3D_4010C20_0000C00

97.W1.52.013.0

DCBM_N1D_6000C15_0000C00

97.W1.48.014.0

DCBM_N4D_4010C20_0000C00

97.W1.52.014.0

DCBM_N00_6000C25_0000C00

97.W1.48.015.0

DCBM_N1D_4010C03_0000C00

97.W1.52.015.0

DCBM_N00_6000C35_0000C00

97.W1.48.016.0

DCBM_N00_4000C35_0000C00

97.W1.52.016.0

DCBM_N0D_6000C35_0000C00

97.W1.48.017.0

DCBM_N00_4000C20_0000C00

97.W1.52.017.0

DCBM_N3D_6010C25_0000C00

97.W1.48.018.0

DCBM_N4D_4000C15_0000C00

97.W1.52.018.0

DCBM_N00_6000C20_0000C00

97.W1.48.019.0

DCBM_N00_4010C20_0000C00

97.W1.52.019.0

DCBM_N00_6010C20_0000C00

97.W1.48.021.0

DCBM_N2D_4000C15_0000C00

97.W1.52.020.0

DCBM_N3D_6010C35_0000C00

97.W1.48.024.0

DCBM_N3D_4000C35_0000C00

97.W1.52.021.0

DCBM_N4D_6010C30_0000C00

97.W1.48.025.0

DCBM_N3D_4000C25_0000C00

97.W1.52.022.0

DCBM_N3D_6000C25_0000C00

97.W1.48.026.0

DCBM_N1D_4000C35_0000C00

97.W1.52.023.0

DCBM_N3D_6000C35_0000C00

97.W1.48.027.0

DCBM_N0D_4010C35_0000C00

97.W1.52.024.0

DCBM_N1D_6000C35_0000C00

97.W1.48.028.0

DCBM_N1D_4000C15_0000C00

97.W1.52.025.0

DCBM_N4D_6010C35_0000C00

97.W1.48.029.0

DCBM_N3D_4010C15_0000C00

97.W1.52.026.0

DCBM_N4D_6000C35_0000C00

97.W1.48.030.0

DCBM_N00_4010C30_0000C00

97.W1.52.027.0

DCBM_N00_6000C15_0000C00

97.W1.48.200.0

DCBM_N0M_4010C20_0000C00

97.W1.52.028.0

DCBM_N00_6010C30_0000C00

97.W1.48.203.0

DCBM_N3M_4000C20_0000C00

97.W1.52.029.0

DCBM_N3D_6010C30_0000C00

97.W1.48.204.0

DCBM_N0M_4000C20_0000C00

97.W1.52.200.0

DCBM_N0M_6000C15_0000C00

97.W1.48.205.0

DCBM_N2M_4000C20_0000C00

97.W1.52.201.0

DCBM_N0M_6000C20_0000C00

97.W1.48.206.0

DCBM_N2M_4010C20_0000C00

97.W1.52.202.0

DCBM_N0M_6000C35_0000C00

97.W1.48.207.0

DCBM_N3M_4000C35_0000C00

97.W1.52.203.0

DCBM_N1M_6000C20_0000C00

97.W1.48.208.0

DCBM_N4M_4000C20_0000C00

97.W1.52.204.0

DCBM_N1M_6000C35_0000C00

97.W1.48.209.0

DCBM_N3M_4010C15_0000C00

97.W1.52.205.0

DCBM_N2M_6000C20_0000C00

97.W1.48.210.0

DCBM_N3M_4010C20_0000C00

97.W1.52.206.0

DCBM_N3M_6000C35_0000C00

97.W1.48.211.0

DCBM_N1M_4000C35_0000C00

97.W1.52.207.0

DCBM_N3M_6010C30_0000C00

97.W1.48.212.0

DCBM_N2M_4010C25_0000C00

97.W1.52.208.0

DCBM_N4M_6000C20_0000C00

97.W1.48.213.0

DCBM_N3M_4010C25_0000C00

97.W1.52.209.0

DCBM_N0M_6010C20_0000C00

97.W1.48.214.0

DCBM_N1M_4000C15_0000C00

97.W1.52.210.0

DCBM_N0M_6010C35_0000C00

97.W1.48.215.0

DCBM_N4M_4000C03_0000C00

97.W1.52.212.0

DCBM_N3M_6010C35_0000C00

97.W1.52.213.0

DCBM_N0M_6010C15_0000C00

97.W1.52.214.0

DCBM_N2M_6010C20_0000C00

97.W1.52.215.0

DCBM_N1M_6000C15_0000C00

10July2024/Version 4

CLEM N°

Product nameLEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

Page 2/13

DCBM 400/600 series
CLEM datasheets'numbers
CLEM N°

10July2024/Version 4

Product name

CLEM N°

Product name97.W1.52.216.0

DCBM_N1M_6010C15_0000C00

97.W1.52.217.0

DCBM_N0M_6010C30_0000C00

97.W1.52.218.0

DCBM_N3M_6000C20_0000C00

97.W1.52.219.0

DCBM_N0M_6000C30_0000C00

LEM International SA
Route du Nant-d’Avril, 152
1217 Meyrinwww.lem.com

Page 3/13

DCBM 400/600 series
Safety⚠

CautionIn order to guarantee safe operation of the product and to be able to make proper use of all features and functions, please readthese instructions thoroughly!
Safe operation can only be guaranteed if the product is used for the purpose it has been designed for and within the limits of thetechnical specifications.
Ensure you get up-to-date technical information that can be found in the latest associated datasheet under www.lem.com. The
used data link cable between product’s elements shall be the one delivered by LEM.
Time source to set product’s time must be provided by the customer. Product must be time synchronized to operate. Product’s
Ethernet interface mustn’t be exposed to a public network; network must be private and secured.
To ensure proper operation, product’s logbook completion must be checked periodically; the maximum number of entries
is 40000; product’s operation stops if logbook is full.
The meter must be installed in an enclosure IP51 (indoor) or IP54 (outdoor) according to EN 50470-1: 2006.

Caution, risk of electrical shock
Electrical equipment should be installed, operated, serviced and maintained only by qualified personnel. No responsibility is
assumed by LEM International SA for any consequences arising out of the use of this material. A qualified person is one who has
skills and knowledge related to the construction, installation, and operation of electrical equipment and has received safety training
to recognize and avoid the hazards involved.
When installing or changing the product, the conductor to which the product is connected must be de-energized. Ignoring thewarnings can lead to serious injury and/or cause damage!
The appropriate torque as defined by the manufacturer shall be applied on product’s terminals.

10July2024/Version 4

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DCBM 400/600 series
Product overview

A

C

D

E

B

F

A Sensor Unit

D Meter Unit

B 2 Nuts with captive washer

E Data link cable

C Protection CoverF Ferrite

Operating conditions
Sensor Unit
Parameter

SymbolUnit

Min

Ambient operating temperature

TA

°C

−40

+85

Ambient storage temperature

TA st

°C

−40

+85

Relative humidity

RH

%

95

Mass

m

g

300
415

Typ

Max

Comment

1)

DCBM 400 series
DCBM 600 series

Impact rating

IK05

According to IEC 62262, withprotection cover mounted

Ingress protection rating

IP10

On current terminals

Maximum temperature of current terminals

°C

110

Note: 1) In any case, maximum temperature of current terminals must not be exceeded.

Meter Unit
Parameter

SymbolUnit

Min

Ambient operating temperature

TA

°C

−25

+70

Ambient storage temperature

TA st

°C

−40

+85

Relative humidity

RH

%

95

Mass

m

g

200

Typ

Max

Comment
Display operation & readability
may be limited below minimum
operating temperature

Impact rating

IK05

According to IEC 62262

Ingress protection rating

IP20

According to IEC 60664-1

10July2024/Version 4

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DCBM 400/600 series
Data link cableParameter

Symbol

Unit

Min

TA

°C

−50

Ambient operating temperature
Test insulation voltagekV

Length

m

Typ

Max

Comment

+120
3.5

0.3

3.5

See product designation forcomplete product reference

Insulation coordination
Parameter

Symbol

Unit

Value

Pollution degreePD2

Rated altitude

m

2000

V DC

1000

Rated insulation voltage
Case material

V0

Comment

According to UL 94

Insulation between live parts and accessible parts
Reinforced Insulation is provided by the Sensor
Unit. The Meter Unit operates in safety
II
extra low voltage.

- Insulation type
- Overvoltage category- Impulse withstand voltage

UNi

kV

8

- RMS voltage for AC insulation test

Ud

V

4400

100 % tested in production

Insulation between voltage terminals- Insulation type

Basic

- Impulse withstand voltage

UNi

kV

4

- RMS voltage for AC insulation test

Ud

V

2200

10July2024/Version 4

Insulation between VP and VN

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Page 6/13

DCBM 400/600 series
General electrical specifications
Sensor Unit
Parameter

SymbolUnit

DCBM 400

DCBM 600

Rated conventional thermal current

A

400

600

Rated operational voltage

V

Comment

1000

Rated duty

Uninterrupted duty

Insertion loss in current path

W

Power consumption in voltage path

W

Rated withstand peak current

10

At rated conventional thermal
current

10
0.13

ÎP maxkA

12

SymbolUnit

Min

Supply voltage

UC

V DC

+12

Supply current

IC

mA

At 1000 V DC
18

10 ms

Meter Unit
Parameter

Supply bridging times

Start-up time 1)s

Energy reserve charging time 2)min

Notes:

1)

0.3

Typ

Max

Comment

+48

±5 %

400

@ +12 V DC

10

@ +24 V DC

0.5

2

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)

RAMS data
Parameter

Mean failure rate

10July2024/Version 4

Symbol

λ

Unit

h-1

DCBM 400

1/537000

DCBM 600

1/476000

Comment
DCBM 400: 150 kW application,
1000 V DC, warm climate, 8760
power cycles per year.
DCBM 600: 350 kW application,
1000 V DC, warm climate, 17520
power cycles per year

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Page 7/13

DCBM 400/600 series
Energy measurement and accuracy
Parameter

SymbolUnit

DCBM 400

Accuracy class

DCBM 600
B

Meter type

Direct connected meter

Energy measurement bandwith

DC

Comment
According to
EN 50470-3: 2006 andEN 50470-1: 2006

Current specification- Starting current

Ist

mA

320

480

- Minimum current

Imin

A

4

6

- Transitional current

Itr

A

8

12

- Reference current

Iref

A

80

120

- Maximum current

Imax

A

400

600

Uref

V DC

150 ... 1000

Umax

V DC

1100

Umin

V DC

135

Voltage specification- Reference voltage- Maximum limit range of operation- Minimum limit range of operation
Cable loss compensation
Test Output LED 3)
Counting direction
Notes:

2)

1)

mΩ

0-14

Imp/kWh

1000
Bidirectional

By steps of 2 mΩ, imported
energy only. Selectable bycharging 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 0-14 mΩ (by step of 2 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)

10July2024/Version 4

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Page 8/13

DCBM 400/600 series
Connection and terminals
Sensor Unit
Parameter

Unit

DCBM 400

DCBM 600

Comment

Current terminals- TypeStud- Terminal finish

Tin plated- Size

M8

M12

mm2

2 × 702 × 150- Rated cross section (busbar)mm

20 × 830 × 10- Minimum tightening torque

N⋅m

10

36

- Maximum tightening torque

N⋅m

25

50

- Rated cross section (cable) 1)

Voltage measurement terminals- TypeScrewless push-in- Rated cross section

0.25 - 2.5 mm2 without ferrule0.25 - 1.5 mm2 with ferrule

Meter Unit
Parameter
Ethernet interface

Value

Comment

RJ45

Power supply terminal- TypeScrew terminal- Rated cross section

0.13 - 1.5 mm2- Maximum tightening torque

10July2024/Version 4

0.6 N⋅m

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Page 9/13

DCBM 400/600 series
Interfaces and communication
Parameter

Value

Display technology

LCD with backlight

Display navigation

2 × Push buttons

Comment

APIs list:

Ethernet interface

Energy registering resolution
IP settings
System monitoring
Readout data format
Data authenticity

HTTP / HTTPS

1 Wh
0.1 Wh- /setting- /status- /legal- /ocmf- /logbook- /livemeasure
DCBM_NxD and DCBM_NxM
DCBM_N00

Fix IP / DHCP
Current / Voltage / Temperature /Monitoring with "/livemeasure" API, at 1 Hz refresh rate
Power / Energy
LEM format / OCMF

OCMF format compliant with S.A.F.E. transparency
software

Asymetric cryptography withpublic key

Signature on "/legal", "/ocmf", "/logbook" APIs. Public
key available from "/setting" API and laser marked onMeter Unit

> 16000> 20000

DCBM_NxD and DCBM_NxM
DCBM_N00
Roll out of memory when maximum number oftransactions is reached

40000

New transactions are blocked when logbook is full

SNTP / from API

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

Start / Stop commands

Charging session identifiers and 128 bytes user data
field in "/legal" APITransaction status LED

Active during transaction

Number of transactions stored
Logbook entries
Time synchronization

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.

10July2024/Version 4

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DCBM 400/600 series
Meter Unit dimensions

A
A 63.7 mm

B 126.2 mm (±0.2)
C 81 mm (±0.2)
D 117.5 mm
E 4.6 mm
F 3.9 mm
G Max M4 screws

B(torque max 1.0 N⋅m)G

H 94.8 mm
I 45 mmJ 45 mm

I

C

H

J

E

G

F
D

K

M

L

10July2024/Version 4

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DCBM 400/600 series
Sensor Unit dimensions (in mm)

M

M

J

[1] [1]

I
A

B

H

G

C D

E

F

M
K

M

M

L

[1] P
 ossible choice
DCBM_SU40XX

DCBM_SU60XX

A

56.8 mm74.2 mm

B

23 mm

36 mm

C

54.6 mm

67 mm

D

50 mm

65 mm

E

143 mm

143 mmF

68 mm

86.3 mmG

5.5 mm

5.5 mmH

132 mm (±0.2)

132 mm (±0.2)

I

M8

M12

J

33.5 mm (±0.2)

51.6 mm (±0.2)

K11.2 mm (±0.2)

11.2 mm (±0.2)

L48 mm (±0.2)

66 mm (±0.2)

M

M4

M4

10July2024/Version 4

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DCBM 400/600 series
Description and Codification
The full codification includes a DC Meter and a data link cable.
For example, DCBM_N0M_4000C20_0000C00 codification includes the following elements:● A DC Meter reference DCBM_N0M_4000_0000● A data link cable of length 2.0 m

Meter family
DCBM: Direct Current Billing Meter
Time source
N: Info time with NTP or API
Cable loss compensation
0: Dynamic 0 - 14 mΩ (2 mΩ steps)
1: No compensation
2: Fix compensation - 2 mΩ
3: Fix compensation - 4 mΩ
4: Fix compensation - 6 mΩ
Certiﬁcation
0: UL recognized
D: With Eichrecht certiﬁcation
M: With MID, LNE and Eichrecht certiﬁcations
Current range
40: 400 A version
60: 600 A version
Counting direction 1)
00: direct (I1 -> I2)
10: reverse (I2 -> I1)
Datalink Cable Length
C35: 3.5 m
C30: 3.0 m
C25: 2.5 m
C20: 2.0 m
C15: 1.5 m
C03: 0.3 m (only for DCBM 400 Series)
Reserved ﬁeld 1
0000C00: default

D C B M _ N 0 M _ 4 0 0 0 C 2 0 _ 0 0 0 0 C 0 0

Note: 1) Current flow direction for imported energy registration. For example, DCBM_N0M_4000C20_0000C00 registers imported energy when current
flows from I1 terminal to I2 terminal. Below figure shows identification of the terminals.
I1

I2

I1

4-80(400) A DC
150V...1000V
CI.B EN50470-40°C / +85°C IP10

VN

COM

I2

1202340856
If this seal is removed
or broken LEM does
not guarantee theproduct and data
integrity

Ie: 400A DC

VP

DCBM SU 4000

Ue: 1000V DC

Uimp: 8kV

Below table summarizes the codifications for generic products.
For other references, minimum quantities apply, please contact your local LEM support.
Codification
DCBM_N00_4000C20_0000C00

DCBM_N0M_4000C20_0000C00

DCBM_N00_4010C20_0000C00

DCBM_N0M_4010C20_0000C00

DCBM_N0D_4000C20_0000C00

DCBM_N0M_6000C20_0000C00

DCBM_N0D_4010C20_0000C00

DCBM_N0M_6010C20_0000C00

DCBM_N00_6000C20_0000C00
DCBM_N00_6010C20_0000C00
DCBM_N0D_6000C20_0000C00
DCBM_N0D_6010C20_0000C00

10July2024/Version 4

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