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10/2021 · User Manual Version 1.0 · valid from firmware version 3.1.22
4
WEBLOG 250
2.2 Connection
There are three equivalent two-pole pluggable screw terminals to connect the M-Bus. An electrician shall
connect the main supply to the screw terminals on the right (110 to 240 VAC). Phase, neutral and earth (PE)
are marked with L, N and earth symbol. The remaining pluggable terminals are reserved for future extensions.
2.3 LED indicators
2.3.1 LEDs on the front
Four LED´s on the front side of the WebLog show status information
about the power supply of the CPU and important system events.
CPU
Power
M-Bus
Logbook
M-Bus Overcurrent
green
yellow
orange
red
Power supply voltage of the CPU
M-Bus CPU uses the M-Bus communication channel
Logbook the log protocol (logbook) contains new unread error message(s)
M-Bus Overcurrent overcurrent / short circuit on the M-Bus