www.nokeval.com [email protected] Loop Powered Isolator 6570 • Input 4..20 mA • Output alternatives 0..20 mA, 4..20 mA or 0..10V • Without auxiliary power supply • Accuracy 0.05% of span • 3000 VDC isolation voltage • DIN-rail mounting • Detachable connectors Loop powered galvanic accuracy isolator 6570 is designed for current input 4..20 mA works without auxiliary operating voltage. Converter is serial connected into a current loop which will be galvanic isolated over to the output 0..20 mA, 4..20 mA or 0..10 V. Typical inaccuracy is smaller than 0.05% of full scale. Typically loop powered isolator cause 5 V voltage drop in the primary loop increased with the output load voltage drop. Model 6570 does not have to have minimum output load nor calibration according to the load. On the voltage output 0..10 V primary input voltage drop is 10V, when input loop current is in maximum 20 mA. Accuracy isolator 6570 can be delivered in three versions according to the output signal: 4..20 mA, 0..20 mA or 0..10V. Input is always 4..20 mA . Loop powered converter takes its operating voltage from the input current loop 4..20 mA. When comparing to auxiliary powered converters the larger voltage drop in the input loop must be noticed when calculating the total voltage need. On the next page is an example how to calculate the necessary operating voltage’s. Nokeval manufactures also converters with auxiliary voltage 24 VDC or 230 VAC which can be programmed for different modifications of standard messages. For example input 0..1000 mV can be converted and isolated as an output of ±10V or inverse current output 20..4 mA with model 641. Narrowest converter is only 9 mm wide, 2-wire model 6580 is designed for applications where the space is the deficiency. Safety limit: Input loop see only a load of 500 ohm in case that output loop is open High accuracy isolator < 0.05% FS

Technical specifications: Input Input resistance Safety limit 4..20 mA see output resistance chart below <500 Ω when output loop open Current output 0/4..20 mA: Max output load Load accuracy effect Voltage output 0..10V: Max load Input voltage drop <5mA, output load >2kΩ 10V, when max output 10V Model type <0.005 % /°C <0.01% /°C <0.03% of span <0.05% of span 3 kV DC, 2 s test Output, please specify: 4..20 mA 0..20 mA 0..10V Model 6570 is not user configurable like the other Nokeval converter types. Therefore it must be ordered for desired output. Input is always 4..20 mA. General: Ambient temperature...