Complete 4-channel system interface unit for ultra-stable, high precision fluxgate technology DS series current transducers. Powers up to 4 x DS50 to DS2000 at the same time. Features Compact 19” rack mount 1U height Current transducers’ output signals (current or voltage) available via 4mm banana plugs Front LEDs indication of normal operation for each transducer and power LED for DSSIU-4-1U Universal autorange (100-240V AC 50/60Hz) AC input voltage or 120–370V DC input voltage.