Endress+Hauser RMA 422, Operating Instructions Manual

Page: 47 / 150

4. Operating overview
Depending on the version and application, the unit offers the
user a large number of possible settings and software functions.
Please take note that the following paragraphs describe the
unit in its full version and could therefore deviate slightly to the
unit available. In particular chapter 4 explaining the display
and the use of the operating menu is only valid for a unit with
the “LC display and front end operation” option.
4.1 Display elements
À
Operation display:
Green LED, illuminates
once power has been
switched to the unit
Á
Fault display:
Red LED, Operating
mode indicator to
NAMUR NE 44, see
chapter 6 “Fault finding”
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Connection for serial interface:
Stereo socket for PC connection cable in order to set up and
read out unit measured values using the PC operating
software.
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HART
®
communication sockets:
Connection sockets for HART
®
operating unit used for setting
up sensors using 2 wire connection. The resistor for the
communication function is already built into the unit.
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Measured value display (option):
5 digit 7 segment display. Displayed are:
- Instantaneous numeric measured value (in operation)
- Dialogue text for setting up
Å
Alarm set point infringement (option):
Digits 1 and 2 are activated by the built-in alarm relays. Each
set point infringement (exceeding or undercut) is indicated
using the relevant symbol.
Æ
Relay condition (option):
Yellow LED, operating condition to NAMUR NE 44.
- Off, relay inactive
- On, relay active (normal condition)
À
Á
Å
Ä
Â
Ã
Æ
Ç
È
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Process transmitter
45