Nokeval 641 Signal Isolator and Converter

Nokeval 641 Signal Isolator and Converter

The Nokeval 641 Signal Converter is designed to convert standard process input and output signals. Current inputs 0/4…20 mA can be converted into voltage outputs, -10…10 V can be converted to 0…10 V, low mV inputs can be converted to standard outputs, and so on. The 641 Signal Converter accepts 2-wire transmitters without separate power supply. Potentiometer input comes as standard.

Galvanic isolation is made at the same time as the conversion. Galvanic isolation cuts the noise signals which may exist when using low voltage signals, for example thermocouples.





Current inputs 0/4..20 mA
Voltage inputs 0..5, 0..10 V, ± 10V
Output 0/4..20 mA, 0..5/10 V, ± 10V, or passive 2-wire output 4-20 mA
Power supply for 2-wire transmitter
Galvanic isolation
Four selectable dampings
Nominal accuracy 0.05 % of range
Power supply 24 VDC ± 10%
mV-inputs on request


Input Details

Inputs: mA, V, potentiometer
Input Channels: 1


Output Details

Output Channels: 1
Outputs: mA, V


Power Supply

Supply Voltage: 24VDC- 22…28 VDC


General Information

Dimensions: 22.5 x 82 x 99 mm (WHD)
Weight: 106 g
Installation: DIN rail according to DIN 46277
Minimum Ambient Temperature: 0°C
Case Material: Plastic
Maximum Ambient Temperature: 45°C


Please call 01628 778688 for more information.