Operating elements, connections and function displays
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2.4 Function indicators (LEDs)
To check the operating status, the device is equipped with 3 LEDs. They are
used to indicate the functions currently being performed and the respective
status.
LED
Colour / Action
Meaning
Power
•
Green & Orange under Light
Dome
Permanently green
Operating voltage is present
Green, flashing orange
Network searching
Orange, flashing green
Idle, logged in to the mobile radio network
Green, flickering orange
Data transfer is ongoing
If the SIM card is missing or defective, the two LEDs go out after a short time.
LED
Colour / Action
Meaning
Status/Error
•
Orange
3s on / 3 x short flashing
Boot phase, network search
3s on / 2 x short flashing
Error condition
3s on / 1 x brief flashing
SIM/PIN error
3s off / 1x short flashing
Field strength low
3s off / 2x short flashing
Field strength moderate
3s off / 3x short flashing
Field strength good
3s off / 4x short flashing
Field strength high
Permanently on
LTE/GPRS connection active.
Permanently on
Field strength unknown
IP server mode: An existing TCP/IP connection is not displayed.
IP telemetry mode: An existing IP telemetry connection is not displayed.
AT mode: This LED is not effective (off) in AT mode.
LED
Colour / Action
Meaning
Current Loop
•
Green
CL meter(s) is/are connected, or CL
interface is bridged
•
From
Current loop is interrupted
