RIA452
2 Endress+Hauser
Function and system design
Measuring principle
Example of an application of the process display unit
The RIA452 single-channel process display unit monitors and displays analog measured values. Pumps can be
monitored with the digital status inputs. The measured value is displayed using the 7-digit 14-segment LC dis-
play. Numbers and engineering units are displayed in white, the bargraph in yellow, overrange and underrange
in red and the limit value flags and digital status inputs in green and yellow. The RIA452 can provide power
directly to two-wire transmitters. You have the option of selecting the input and the transmitter power supply
as intrinsically safe for Ex applications. Up to eight freely programmable relays monitor the measured value for
limit value violation. Other operating modes for the relays include sensor or device malfunction, batch and
pump control functions (e.g. alternating pump control).
The scalable analog output offers many different ways of forwarding the input signal: zoom function, linearisa-
tion, offset, inversion and signal conversion (input/output conversion). The optional pulse output gives the user
the option of transmitting integrated process values.
Measuring system Microcontroller controlled display unit in panel mounted housing with multicoloured, illuminated LC display.
The analog measured value acquisition takes place via an analog/digital converter. The digital status inputs are
scanned cyclically. Power can be supplied directly to two-wire sensors with the transmitter power supply inte-
grated as standard. The current input is optionally available as an intrinsically safe version for Ex applications.
Here, the RIA452 has a second, intrinsically safe transmitter power supply.
The freely scalable analog output is transmitted via a digital/analog conversion. The digital pulse output is
transmitted directly.
Up to eight relay outputs are possible for limit value monitoring, pump control and batch functions.
The device can be operated on site using the jog/shuttle dial or via the PC with the aid of the ReadWin
®
2000
operating software. Operation can be locked using the hardware key or software code.
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