Specifications

Configuration / project engineering
6.5 LED display
SCALANCE X-400 BA
Operating Instructions, 03/2009, C79000-G8976-C186-07
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Figure 6-6 Displaying the four possible display modes
6.5.3 LED display - power module
Display modes A through C
In display modes A through C, the two LEDs D1 and D2 of the CPU module are lit as
described in the section "Selecting the display modes". In these three states, the status of
the signaling contact and the presence of the supply voltages are displayed by the LEDs of
the power module.
Figure 6-7 Example of the LED display of the power module and the CPU module in DMode A
The following table lists the significance of the three LEDs on the power module for display
modes A through C:
Label Color Status Meaning
off The IE Switch X-400 has not detected any faults, the
signaling contact is closed.
F
Red on The IE Switch X-400 has detected a fault, the signaling
contact opens.
off Power supply L1 lower than 17 V. L1
Green on Power supply L1 higher than 17 V.
off Power supply L2 lower than 17 V. L2
Green on Power supply L2 higher than 17 V.