Siemens EF6 Series Manual de usuario descargar pdf (Pagina 28)

3RS17 Interface Converters

Normalized signal and universal converters

Interface converters are mainly used to electri-

cally isolate and convert analog signals. Sen-

sors/actuators and controls generally have dif-

ferent power supply units, and therefore require

electrical isolation in the signal circuit. This is ei-

ther integrated in the control or is implemented

using an interface converter.

A signal must be converted into another signal

if, for instance, a voltage signal needs to be

transmitted over a long distance as current sig-

nal – or if the output of a sensor and the input of

a control system are not compatible with one

another.

Frequency outputs can be used for an addition-

al application. In this case, the input signal is

converted into a proportional frequency. This

means that analog signals can be processed

with digital inputs. This is important if the con-

trol does not have provision for an analog input

or if all of its analog inputs are already assigned.

This can occur, for example, when devices are

retrofitted.

Your advantages:

• Space-saving design

• Easy-to-set universal converter

• Converters with frequency output

• All ranges are fully calibrated

• Unified family of devices – the ideal solution for

every application

• Integrated manual-automatic switch with

adjustable setpoint

• Outputs are short-circuit-proof

• Up to 30 V – protected against damage caused by

faulty wiring

Applications:

• Electrically isolating analog signals

• Converting analog signals

• Converting analog signals into a frequency

• Converting non-normalized into normalized signals

• Overvoltage protection for analog inputs

Engineering information:

Passive converters draw the power they require from

the analog signal. They do not require their own

power supply.

For 2-way isolation, the input is electrically isolated

from the output and from the power supply, output

and power supply are at the same potential. For

3-way isolation, all of the three circuits are isolated

from one another.

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