Emerson Rosemount 3490 Series Reference Manual page 13

Reference Manual
00809-0100-4841
2.3.2 Status LED
The LED is positioned just below the LCD display. It flashes once per second to indicate
that the control unit and transmitters are operating correctly. The LED is constantly lit if
there are operating difficulties e.g. a transmitter fault.
Related information
Control unit front panel
2.3.3 Display
After the power-up and self-checks are completed, the Full PV display is presented. The
default Full PV display typically features a digital clock, a measured variable with display
units, and status icons. There are some display differences between control units:
• On the Rosemount 3491 and 3492, a bar graph indicates the 4–20 mA output signal.
The Rosemount 3493 display can be changed to show the bar graph.
• On the Rosemount 3492, an extra icon on the first line and indicates if one or two HART
transmitters connected to the control unit.
• On the Rosemount 3493, there are two totalizers displayed; one above and one below
the control unit PV.
Emerson.com/Rosemount
Control unit overview
January 2021
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