Endress+Hauser RLN42, Руководство по эксплуатации, Страница: 27 / 32

RLN42 Appendix: system overview of RN Series
Hauser 27
13 Appendix: system overview of RN Series
13.1 Power supply of RN Series
13.1.1 General information on the power supply of Hauser
isolating amplifiers
Read the information leaflet enclosed in the package of the individual products.
13.1.2 Power supply options RN4x Series (24 to 230 V)
The RN42 active barrier and the RLN42 NAMUR isolating amplifier are available with an
extended supply voltage range of 24 to 230 V
AC/DC
. These modules are powered
individually and exclusively via the terminals on the device and are not suitable for power
supply via the DIN rail bus connector.
13.2 Applications of the isolating amplifiers
This section describes the typical applications of the devices.
These devices perform various functions during signal conditioning:
• Amplification
• Normalization
• Filtering
• Galvanic isolation
• Supply of electrical power to connected sensors
• Line monitoring
The devices for these tasks are collectively known as isolating amplifiers or signal isolators
and are available with different functions in the Hauser RN Series. Different types
of signals are conditioned in this context.
13.2.1 Types of signals
Signals are referred to as analog signals if they can continuously assume every value
between a minimum and maximum value (e.g. 0/4-20 mA) and are therefore also known
as "value-continuous" signals. The value range in this interval is huge and is practically
infinite in terms of measuring accuracy.
Electrical analog signals are generated with the help of a sensor, for example, which
records the states, or changes of state, of physical variables and converts them to an
electrical signal.
The following variables are typically measured in system and process engineering using
Hauser measuring devices:
• Temperature
• Pressure
• Level
• Flow
• Analysis values (e.g. turbidity, conductivity, pH etc.)
These analog signals are evaluated in the controller (PLC) and the signals can be used in a
"target device": e.g. for
• Display devices, e.g. level indication via RIA15
• Control unit, e.g. level control
• Actuators, e.g. to fill a tank