عضویت 
ورود اعضا
راهنمای خرید
Signal converter 6410 pages
Yrittajakatu 12
FIN-37100 Nokia
Nokeval
Tel. +358-3-342 4800
Fax. +358-3-342 2066
Signal converter 641
• Current inputs 0/4..20 mA
• Voltage inputs 0..5, 0..10 V, ± 10V
• Potentiometer
• 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
Signal converter 641 is designed to convert standard process input /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 etc. Signal converter 641 accepts 2-wire transmitters
without a separate power supply. Potentiometer input as a
standard.
Galvanic isolation is made at the same time with the convertion. Galvanic isolation cuts the noise signals which may
exist when using low voltage signals, e.g. thermocouples.
0.±5 V, 0..±10 V or current 0/4..20 mA. Converter 641 gives
also the possibility to signal damping. There is four selectable dampings: 10 ms, 250 ms, 500 ms or 750 ms. Selecetion via DIP-switches. Operating voltage 24 VDC ± 10% is
also isolated from input and output.
The common inputs and outputs are selected via DIP-switches, see table next page. Fine adjustment is made with front
panel zero and span potentiometers. The ranges, not given
in the table, may be delivered on request. Signal converter
641 is delivered always to ordered range.
Output selectable via DIP-switches: voltage 0-5V, 0-10V,
Power supply 24 VDC
isolated from input
and output
Input:
0...20 mA
4..20 mA
0...5 V
0...10 V
+-10V
20....4 mA
10..0 V
Potentiometers
mV-inputs
Output:
0...20 mA
4..20 mA
0...5 V
0...10 V
+-10V
20..4 mA (reversed)
2-wire output 4-20 mA
(passive output)
4..20 mA
2-wire transmitter
without external
power supply
Power supply 24 VDC
isolated from input
and output
+15 VDC
Output 0/4..20 mA,
0..10 V or 2-wire
connection 4..20 mA
4..20 mA
DIP-switches for range selection
"
