Insulation monitor, product range: measuring and monitoring relay EMR, coupling module, extension of the nominal voltage range of the EMR6-R400-A-2 to 690 V AC or 1000 V DC, no supply voltage required, nominal voltage of the network to be monitored: 0 - 690 V AC, 0 - 1000 V DC, installation position: any, fastening: snap-on mounting rail IEC/EN 60715, width: 45 mm, standards and regulations: IEC/EN 60255-6, EN 61557, UL, CSA, GL