Measurement terminals for voltage measurement on batteries and generators

Millivolt measurement at high voltage level

High-level voltage measurement is an important topic in the field of electromobility, for example. The ELM3002-0205 EtherCAT measurement terminal from Beckhoff, which is well-suited to this field with a measuring range of up to ±1200 V, is now supplemented by the two new ELM3002-0305 and ELM3002-0405 terminals, which can measure an mV voltage drop – e.g., on shunt resistors – in order to determine the current.

With the new ELM3002-0305/0405, accurate mV measurements are available at high voltage levels up to 1000 V. Seven voltage measurement ranges from ±5 V to ±60 mV are supported, suitable for single cell measurement and shunts. Both EtherCAT measurement terminals offer a voltage range of ±2.5 and ±5 V, 24 bit resolution, and 50 ksps per channel as well as ±200 ppm accuracy. The -0305 version has two galvanically isolated analog input channels for mV measurements in two different current branches. With version -0405, on the other hand, the voltage can be measured in the range up to ±1200 V via channel 1 and the mV voltage drop across the shunt resistor via channel 2.