Energy reference meter IEM
The IEM enables efficient use in various charging infrastructure applications, such as DC wallboxes, high-power chargers, megawatt charging systems and other applications as well as smart metering point operation. The three different versions of the DC meter cover currents and voltages of up to 1500 A and 1500 V.
Characteristics:
- MID certification, certification in accordance with the German Calibration Law, LNE
- Accuracy class B according to EN 50470 (MID)
- Creation and internal storage of charging transactions in standardized OCMF format
- Communication interfaces: OCMF (RJ45, Ethernet, IEM-DCR only), CAN info for real-time measurement data
- Compensation options: 4-wire measurement, parametric compensation
Installation flexibility
Thanks to the shunt-based measurement, the DC meter is highly compact. The display unit (DU) and the sensor unit (SU) can be installed up to 15 meters apart offering a high degree of flexibility in installation. This means that the sensor unit can also be installed in hard-to-reach areas with challenging environmental conditions. Additionally, the CAN interface enables the measurement of real-time data (e.g., T, I, U, P, ...) with a sampling rate of 10 ms.
DC meters for various applications

IEM-DCR-125 - Sensor Unit and Display Unit
- SU-125: Nominal current measuring range up to 125 A and 1000 V
- The top-hat rail design for mounting in a wide variety of housings
- 2 voltage channels
- MID certification, certification in accordance with the German Calibration Law, LNE
- Areas of application: DC wall boxes and smaller DC charging stations
IEM-DCS-125 sensor unit for stand-alone operations
- SU-125: Nominal current measuring range up to 125 A and 1000 V
- Measurement data is recorded in real time
- 2 voltage channels
- Signed energy values
- Areas of application: DC wall boxes up to 125 A

IEM-DCR-1000/-1500 – sensor unit and display unit
- SU-1000: Nominal current measuring range up to 1000 A, 1500 V
- SU-1500: Nominal current measuring range up to 1500 A, 1500 V
- 4 voltage channels
- Sensor unit can be mounted via busbar
- MID certification, certification in accordance with the German Calibration Law, LNE
- Areas of application: DC charging stations, megawatt charging systems
IEM-DCS-1000/-1500 – sensor unit for stand-alone operations
- SU-1000: Nominal current measuring range up to 1000 A, 1500 V
- SU-1500: Nominal current measuring range up to 1500 A, 1500 V
- Measurement data is recorded in real time
- Signed energy values
- Sensor unit can be mounted via busbar
- Areas of application: Fast charging systems, ultra-fast charging systems, megawatt charging, DC wall boxes, smart grid
(IEM-DCS-1500)
- DC meter @ stationary energy storage
- DC meter @ PV energy generation
- DC meter @ public charging facility
- DC meter @ public charging facility (charging session billing)
- DC meter @ commercial vehicle charging facility
- DC meter @ e-bus pantograph
- DC meter @ MCS Megawatt Charging System
- DC-Meter @ Intra-Logistics