Insulation monitoring relays, Product range: EMR Measuring and monitoring relays, Coupling module, Expands the rated voltage range for the EMR6-R400-A-2 to 690 V AC or 1000 V DC, no supply voltage required, Rated operating voltage for the supply system being monitored: 0 - 690 V AC, 0 - 1000 V DC, Mounting position: As required, Fixing: Snap fixing, top-hat rail IEC/EN 60715, Width: 45 mm, Standards: IEC/EN 60255-6,