Analog signal converters Overview ABB 1SVR011718R2500

Analog signal converters Overview

– Universally configurable devices and single-function devices– Adjustment and operating elements on the front side– Safe operation by electrical 3-way isolation– Unambiguous and clear connecting terminal markings

Conversion, measurement and separation of

– Standard signals (0-5 V, 0-10 V, 0-20 mA, 4-20 mA)– Temperature signals of RTD sensors (PT 100)– Thermocouple signals (types J and K)– Current measurement signals (0-5 A, 0-20 A AC/DC)

Characteristics of single-function devices

– No adjustment or balancing necessary.

Characteristics of universal devices

– The required input and output ranges can be configured by means of directly accessible DIP switches positioned on the side– Gain adjustment of ±5 % by means of an adjustment potentiometer on the front-side– Offset adjustment of ±5 % by means of adjustment potentiometers on the front-side

– 8 different standard signal outputs on one device – Input and output side universally configurable – Also available with 2 threshold relay outputs – Adjustment and operating elements on the front side– Safe operation by electrical 3-way isolation– Plug-in connecting terminals, unambiguously and clearly marked

Conversion, measurement and separation of

– Standard signals– Signals of RTD sensors (PT10, PT100, PT1000)– Thermocouple signals– TRMS values of currents and voltages

Characteristics

– The required input and output ranges can be configured for all devices by means of directly accessible DIP switches positioned on the side.– Due to the wide input range of the gain and offset stages all input signals between the minimum and the maximum input value can be universally converted to all common output signals.– Devices for DC or AC (50/60 Hz) supply available.

Analog signal converters Overview

Applications for analog signal processing and correct solution using CC-E and CC-U converters

Nearly every process includes a control system that receives data by means of analog signals and then evaluates the data and sets the respective parameters correspondingly. When transmitting analog signals numerous problems may arise which can disturb or even block an ideal behavior of the process. Below we have listed some processing problems together with the respective solutions to solve these problems:

Signal conversion

Sometimes the available signals cannot be processed by the controller or the actuator. In this case, signal converters are required to convert the input signal (or different input signals) to the desired output signal.

Signal amplification

If long lines or high burdens have to be operated, it may be necessary to amplify the signal. CC analog signal converters require only low input power and provide high output power. Thus, there are no restrictions for the converter's position on the line, i.e. it can be used– for signal refreshing (1) at the end of the line (low input power) – or for signal amplification (2) at the beginning of the line (high output power).

Signal filtering

Particularly on long lines or in rough industrial environments the signals are exposed to high electromagnetic interferences. The frequency of the coupled interference signals may be in the range of the common mains frequency (50 Hz) or even much higher (in case of frequency converters). According to the specific requirements, analog signal converters are avail able which provide reliable suppression of those interferences by means of an input low-pass filter.

Signal separation

– Protection against overvoltage 4-20 mA Actuator The increased use of micro-electronics make controls much more sensitive against overvoltages, resulting from lightning discharges or switching processes. Suppression diodes are incorporated in the input of the CC analog signal converters which enable the converters to arrest overvoltages with low energy level (resulting from switching processes) by themselves. The products furthermore provide electrical isolation between input, output and supply circuit for protection of the controller connected to the output.  – Protection against ground loops If components are used which refer to ground, the measuring signals can be falsified by a so-called ground loop. In this case, certain parts of the signal are transmitted via earth and not via the analog transmission line, thus causing incorrect evaluation of the signal. The electrical isolation between the input and the output disconnects these ground loops and thus enables correct signal transmission.

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Analog signal converters - CC-E range Benefits and advantages

CC-E/STD analog signal converter with 3-way electrical isolation– 2 universally configurable devices (type CC-E/STD)– 2x10 single-function devices– "Plug and Work", no adjustment of single-function devices required

CC-E/TC analog signal converter for thermocouple signals of the types J and K with 3-way electrical isolation– 2 universally configurable devices (type CC-E/TC) – 2x6 single-function devices– "Plug and Work", no adjustment of single-function devices required– Integrated cold-junction compensation