ABB – CM‑IVN.S (1SVR750669R9400) – Coupling Unit for Insulation Monitoring

The ABB CM‑IVN.S (P/N 1SVR750669R9400) is a passive DIN-rail mounted coupling unit that extends the voltage monitoring range of ABB CM‑IWN insulation monitoring relays. It enables safe measurement of insulation resistance in unearthed (IT) systems up to 690 VAC or 1000 VDC, supporting critical safety in industrial installations.