Isabellenhütte Heusler GmbH & Co. KG // isascale@isabellenhuette.de //
Issue August-2021 // http://www.isabellenhuette.de/en/precision-measurement
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IEM-DCC // Calibration regulation-compliant DC energy meter
ISAscale
®
Energy Meter – DC charging
Features
Technical data
Communication
Application
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 F testing by conformity service centre as well as passed
ANL DC charging meter benchmark study
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)
Fulfills accuracy requirements of NIST HB 44 (passed ANL tests)
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
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 + transaction receipt
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
HIGH PRECISION CURRENT MEASUREMENT SYSTEM