The CM-IWN.1 serves to monitor insulation resistance in accordance with IEC 61557-8 in unearthed IT AC systems, IT AC systems with galvanically connected DC circuits, or unearthed IT DC systems with a voltage up to 400 Volt AC and 600 Volt DC. The measuring range can be extended up to 690 Volt AC and 1000 Volt DC by using the coupling unit CM-IVN. It can be configured to the requirements of the applications and therefore used multi-functional. The CM-IWN.1 is available with two different terminal versions. You can choose between the proven screw connection technology (double chamber cage connection terminals) and the completely tool-free Easy Connect Technology (push-in terminals)