Data Acquisition & Telemetry


New l/f converter

March 2007 Data Acquisition & Telemetry

The universal input and user-friendly configuration of this new converter allows you to digitise temperature and analog measurement signals with effortless ease.

The 4222 is the latest addition to PR electronics' PReasy series, which can be configured in no time by way of the detachable display 4501. This converter accepts all commonly used industrial signal types and is ideally suited in any application where temperature signals and analog measurement signals need to be converted to a frequency signal.

When you are configuring the converter, there is no need to take out the manual. The detachable display 4501 comes with scrolling help texts in seven freely selectable languages, thus guiding the user safely through all the configuration steps. All user options are selected by way of the front keys on the display and the user is completely independent of PCs, DIP switches and jumpers. Process data and unit status are shown in the display and the configuration can be copied quickly and easily from one 4222 to other 4222 modules.

The input of the 4222 has been designed to accept V, mA, TC, RTD, potentiometer and linear resistance signals. The frequency output can be selected as NPN, PNP or TTL output and the span of the frequency signals is freely selectable in the range 0,001 Hz to 25 kHz. Flexibility is the key word and this is also reflected in the universal supply which ranges from 21,6 to 253 V a.c./19,2 to 300 V d.c. irrespective of polarity.

The display 4501 can also be used to calibrate the converter to suit all process input types. In addition to all this, it is, among many other things, also possible to perform process simulation and protect the chosen configuration with a password.

PReasy 4222 bears the mark of PR electronics' strong focus on safety and efficiency. Our new converter features galvanic isolation of 2,3 kVAC between input, supply and frequency output. In case of a sensor error the user is alerted via the display and the frequency output. Furthermore, the 4222 performs an advanced auto-diagnostics and indicate the function status in the display or by way of the front LED. PReasy 4222 complies with NAMUR NE21 (Burst), the Low Voltage Directive (LVD) and UL 508.

For more information contact Paul Giffen, WIKA, +27 (0)11 621 0000, [email protected]



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