INTRODUCTION
The IEM-DCC-500 is a high precision DC energy meter that
features compliance to German Eichrecht. The main application is
DC charging infrastructure for electric vehicles with a power class
up to 500 kW. This device with energy backstop supports current
measurement up to 500 A and voltage measurement up to 1,000 V.
IEM-DCC
Calibration regulation-compliant DC energy meter
ISAscale
®
Energy Meter – DC charging
APPLICATIONS
DC energy meter (with return stop) in DC charging stations for
electrically powered vehicles up to the power class of 500 kW
with calibration regulation-compliant recording of individual
charging processes
For calibration regulation-compliant billing with a declaration of
conformity as per German MessEV module B and module D
testing by conformity service centre
FEATURES
Measuring taps for current and voltage integrated in tamper-
proof sealed housing
Rated insulation voltages as per DIN EN 60664-1:2008-01
Backlit TFT display with 7+2 digits and 320x240 pixels
Tamper-proof after installation and start-up thanks to terminal
cover with sealing screw
Measurement accuracy class B as per VDE-AR-E 2418-3-100 and
DIN EN 50470 (MID)
Charging cable-dependent parametrisation for the software-side
compensation of the charging cable losses
Four-wire measurement to detect charging cable losses
Creation of a calibration regulation-compliant and digitally signed
transaction receipt in the ISA-EDL-40-P format
Calibration regulation-compliant event storage
TECHNICAL DATA
Description Unit
Application temperature -25 ... +70 °C
Supply voltage 10 ... 48 V
Communication interface RS 485
Communication log SML
Transaction receipt format ISA-EDL-40-P
Digital signature ECDSA (ECC 256)
DIMENSIONS [mm]
Length: 235 / Width: 175 / Height: 62
PUBLIC EV CHARGEPOINT USER
< 500 kW
BACKEND (EMP)
BILL
€
§ time NTPID
OCPP – start/stop of charging
including contract-ID
OCPP – § time NTP
OCPP – accounting info
Identification via
RFID
APP
CREDITCARD
CHARGE CONTROLLER
CHARGE POINT OPERATOR (CPO)
interface: RS485
protocol: SML
mode: EDL 21 | EDL 40 | EDL 40++
encryption: ECC256
protected
time base
digitally signed
electronic
transaction
receipt
contract-ID
Accounting via
APP
CREDITCARD
PKI secure area
PKI secure area
COMMUNICATION
Isabellenhütte Heusler GmbH & Co. KG // isascale@isabellenhuette.de // Issue April-2023 // www.isabellenhuette.de 1/ 1