65800 pages

www.nokeval.com
sales@nokeval.com

Nokeval

Yrittajakatu 12
FIN-37100 Nokia

Tel.
+358 3 342 4800
Fax. +358 3 342 2066

2-wire 4-20 mA isolator 6580
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Very slim, 9.5 mm only
2-wire output 4..20 mA
Inputs 0..20 mA, 4..20 mA or 0..10 V
Galvanic isolation 1000 V
Power supply 10..34 VDC
Voltage drop in input loop 1V
Output load 700 ohm (with 24 V)
Accuracy 0.05% of span
Specially suited for programmable logics

Nokeval has designed a very slim, 9 mm only, 2-wire converter with calvanic isolation. Converter is powered by output 2-wire loop. It is specially suited to isolate analog
inputs of programmable logics because those supply the
power and wiring is simple. The idea of connecting power
supply to output side eliminates typical problems of conventional isolators like small output load and high input
side voltage drop.
Three input types are available: 0..20 and 4..20 mA or
0..10V, output is always 4..20 mA. Output load is 700
ohm by 24 VDC power supply. You can increase output

load by rising output loop voltage (see picture 3). Input
voltage drop, 1 V only, enables connection of several devices to same input loop. Converter is delivered calibrated to 0.05 % accuracy of full scale. Front cover has zero
and span potentiometers for eventually recalibration. The
damping of standard 6580 is 10 ms.

Signal isolator 6580
+ 10..36 V

Power supply 24 VDC,
isolated from input

3

Inputs:
0..20 mA
4..20 mA
0..10 V

Output:
4..20 mA, 2-wire output

+2
4
-1

Output load can be increased
by rising output loop voltage.

2-wire isolator 6580