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2 led "power – Siemens ESM User Manual

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Interfaces, Displays and Operator Controls

Industrial Ethernet OSM/ESM

56

C79000-Z8976-C068-10

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:

Display mode

Meaning

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.

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.

LED off

LED off

LED off

LED off

LED on

LED off

LED on

LED off

LED off

LED off

LED off

LED on

3

2

1

3

2

1

3

2

1

3

2

1

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