Hot Plug-In (Ezlink Sensors Only); Sensor Setup Parameters; Transmitter Configuration Parameters; Sensor Addition - ABB AWT420 Operating Instruction

22 AW T4 2 0 | U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | O I/A W T4 2 0 - E N R E V. B

8 Hot plug-in (EZLink sensors only)

Hot plug-in is a feature of the AWT420 transmitter that enables
sensors to be added, removed or replaced without the need to
power down the transmitter. The EZLink connector enables
sensors to be connected and disconnected without tools and
without opening the transmitter enclosure. Hot plug-in also
enables a sensor to be configured in one location, then installed
in a different location without the need to reconfigure the
sensor as all the configuration values are stored in the sensor.
Hot-plug in recognizes both the connection of a replacement
sensor to an input channel previously used by another sensor
and the connection of a new sensor to a previously unused
input channel.
The Easy Setup menu is displayed when a new or replacement
sensor is connected to the transmitter.
For the purposes of the remainder of Section 7, the following
definitions apply:

Sensor setup parameters

Are those that are sensor-specific and are stored in the sensor
(for example, sensor tag, serial number, cleaning interval, units,
date of manufacture etc.). For some sensor types, the setup
parameters may also include primary variable, measurement
units and measurement range. The transmitter maintains a
copy of these parameters as long as the sensor is connected.

Transmitter configuration parameters

Are those that define transmitter operation (for example,
current output assignment and range, relay and alarm
assignment). Some sensor types also store sensor setup
parameters in the transmitter.

Sensor addition

To add a new sensor to the unused input channel:
1 Connect the sensor to the transmitter EZLink connector –
see page <?>. The transmitter detects the new sensor
automatically and loads the sensor setup parameters stored
in the sensor. When upload is complete, the Easy Setup
prompt is displayed:
AWT420
03-09-2019
08:14:45
Sensor S1 (to 2)
Detected
Start Easy
Setup ?
2 Press the key ( ) to start Easy Setup or press the
( ) to use the sensor setup parameters stored in the sensor.
NOTICE
The remaining steps are applicable only if Easy Setup is
selected.
3 Press the key (Edit) to change the default value/setting
to the required value/selection. Press the
accept the default or revised value/selection and advance
to the next parameter.
Sensor parameters that can be configured in this way are
sensor-specific. Refer to the relevant sensor Operating
instruction.
4 On completion of Easy Setup, the display returns to the
Easy Setup start screen:
Menu
Easy Setup
Exit Select
key
key (Next) to