2.4 LED indicators
There are in total six LEDs in the front part showing the status of the M-Bus. A lighted LED has the following
meaning:
POWER The M-Bus output voltage is switched on.
TRANSMITTING The Master sends data.
RECEIVING Minimum one meter replies with data.
MAX CURRENT The maximum number of connectable meters is exceeded (warning).
SHORT CIRCUIT M-Bus over current / short circuit (2 Hz flashing)
M-Bus ACTIVE One interface is active and exclusively occupies the M-Bus.
Two LEDs in the RJ45 Ethernet socket show the state of the network and the virtual comport. The LEDs have
a reduced intensity of 20% of the normal value without a connected network cable. Once a network is
connected, the brightness changes to 100%. The most important flash patterns have the following meaning:
You can find all other patterns in the online help of the DS Manager (F1-button) in the chapter “Firmware
Manuals / Device Server Application Firmware / Status LED Signals (Red = Green / Green = Yellow).
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