Key facts
- Brand
- Nokeval
- Model
- 641
- Category
- Automation control Equipment
- Industry
- Industrial
- Documents
- 2
- Languages
- EN · FI
- Last added
- 2026-10-07
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Nokeval 641 Galvanic Isolator and Signal Converter User Manual
The Nokeval 641 is a 3‑way galvanic isolator and signal converter that separates input and output signals while providing conversion between current (mA), voltage (V) and millivolt (mV) ranges. It supports bipolar signals and can be configured for various standard ranges via DIP switches and a jumper.
The manual covers installation on a DIN rail, wiring guidelines, configuration of ranges and damping, troubleshooting tips, and technical specifications such as dimensions, operating temperature, isolation voltage and power consumption.
Nokeval 641 specifications
| Dimensions (W×H×D) | 22.5 mm × 82 mm × 99 mm |
|---|---|
| Weight | 106 g |
| Mounting | DIN rail (DIN 46277) |
| Operating temperature | 0 … 45 °C |
| Isolation voltage | 1000 V (input‑output) |
| Power supply | 24 VDC ±10 % |
| Input resistance (current) | 50 Ω |
| Maximum output load | 600 Ω |
Source: Nokeval 641 Galvanic Isolator and Signal Converter User Manual
All Nokeval 641 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What power supply voltage is required for the Nokeval 641?
The device requires a 24 VDC power supply with a tolerance of ±10 %.
From: Nokeval 641 Galvanic Isolator and Signal Converter User Manual
What is the maximum isolation voltage between input and output?
The isolation rating is 1000 V between input and output.
From: Nokeval 641 Galvanic Isolator and Signal Converter User Manual
What supply voltage does the Nokeval 641 require?
The unit needs a 24 VDC supply with a tolerance of ±10 % and the supply is galvanically isolated from the signal circuits.