SIEMENS
10/166
Siemens IC 10 · 2017
Relays
Coupling Relays and Signal Converters/Interface Converters
SIRIUS 3RS70 signal converters
10
■
Overview
SIRIUS 3RS70 signal converters
Signal converters perform the coupling function for analog
signals on both the input side and the output side. They are
indispensable when processing analog values with electronic
controls. Under harsh industrial conditions in particular, it is often
necessary to transmit analog signals over long distances.
Electrical separation is then needed as a result of the different
power supplies. The resistance of the wiring causes potential
differences and losses which must be prevented.
Electromagnetic disturbance and overvoltages can affect the
signals on the input side in particular or even destroy the analog
modules. All terminals of the 3RS70 signal converters are safe
up to a voltage of 30 V DC and protected against switching
poles. Short-circuit protection is an especially important function
for the outputs.
The devices are EMC-tested according to
•
IEC 61000-6-4 (generic standard for emitted interference)
•
IEC 61000-6-2 (generic standard for interference immunity)
The analog signals comply with
• IEC 60381-1/2.
Article No. scheme
Note:
The Article No. scheme shows an overview of product versions
for better understanding of the logic behind the article numbers.
For your orders, please use the article numbers quoted in the
selection and ordering data.
More information
Home page,
see www.siemens.com/relays
Industry Mall,
see www.siemens.com/product?3RS70
Conversion tool, e.g. from 3RS17 to 3RS70,
see
www.siemens.com/sirius/conversion-tool
Product versions
Article number
Signal converters
3RS70
@
@
–
@
@
@
0
0
Product function/type of
input signal
Single-range converters, active
0
0
3-way separation, input 0 ... 10 V
0
2
3-way separation, input 0 ... 20 mA,
0
3
3-way separation, input 4 ... 20 mA,
Switchable multi-range converters, active
0
5
3-way separation, 3 standard signals can be
switched 0 ... 10 V, 0/4 ... 20 mA
Switchable universal converters, active
0
6
3-way separation, 16 signals can be switched
Single-range converters, passive
2
0
2-way separation, 4 ... 20 mA
Switchable multi-range converters, active
2
5
3-way separation, with manual/automatic switch
and setting potentiometer
Connection type
Screw terminals
1
Spring-type terminals (push-in)
2
Type of output signal
0 ... 10 V
A
0 ... 20 mA
C
4 ... 20 mA
D
Loop power isolator 4 – 20mA
E
3 standard signals can be switched
F
4 frequencies can be switched
K
Supply voltage
24 V AC/DC
E
None
T
24 ... 240 V AC/DC
W
Example
3RS70
0
0
–
1
A
E
0
0
© Siemens AG 2016