Led "Power - Siemens ESM Operating Instructions Manual

Interfaces, Displays and Operator Controls
4.2.2

LED "Power"

The display mode of the "Power" LED can be switched over by briefly pressing the
"Select/Set" button on the front panel of the OSM/ESM. The valid display mode is
indicated by the display mode LEDs on the OSM/ESM.
Depending on the status of the display mode LEDs, the "Power" LED has the two
following display modes:
Status of the power supplies
In the following states of the display mode
LEDs, the Power LEDs indicate the current
status of the two voltages of the OSM/ESM:
Display Mode
Note
LED 3 exists only on devices with digital
inputs.
56
Display mode
3 2
1
LED off
LED off LED off
3 2
1
LED off
LED off LED on
3 2
1
LED on LED off
LED off
3 2
1
LED on LED off LED off
Meaning
Power LED L1 or L2
- Lit green; in other words, power supply 1
or 2 (line 1 or line 2) is applied.
Not lit; in other words power supply 1 or 2
-
(line 1 or line 2) is less than 14 V.
Industrial Ethernet OSM/ESM
C79000-Z8976-C068-10