Westermo AD-01 - Manual (Page 10)

10 6612-2202
LED indications
LED Status Description
PWR LED on Correct internal power
LED off No internal power
Tx LED on Data received slave interface
LED off No data slave interface
Rx LED on Data received master interface
LED off No data master interface
V.24 LED on Rs-232/V.24 master port open
LED off Rs-232/V.24 master port closed
M-Bus LED on M-Bus master port open
LED off M-Bus master port closed
OL/sC LED on Overload / short-circuit M-Bus master interface
LED off Normal communication M-Bus master interface
PF* LED on Power failure M-Bus slave interface
LED off M-Bus slave interface receives correct power from line
* Observe that if M-Bus slave mode is set to not used, PF led is always inactive.