Description of the device
4.7 LED display
SCALANCE XM-400
Operating Instructions, 09/2018, C79000-G8976-C306-08
35
To set the required display mode, press the "SELECT/SET" button.
If you do not press the "SELECT/SET" button for longer than 1 minute, the device
automatically changes to display mode A.
Pressing SELECT/SET button
starting at display mode A
Press twice Off On Display mode C
The "L1" and "L2" LEDs indicate the current range of the power supply at connectors L1 and
L2.
The meaning of the "L1" and "L2" LEDs depends on the set display mode, see section
"LEDs "DM1" and "DM2" (Page 34)".
Meaning in display modes A, B, C and E
In display modes A, B, C and E, from the "L1" and "L2" LEDs you can see whether the
power supply is higher or lower than 17 V.
Power supply lower than 17 V
Power supply higher than 17 V
Meaning in display mode D
In display mode D, the "L1" and "L2" LEDs indicate whether the power supply is monitored.
- Off Power supply is not monitored.
If the power supply falls below 17 V, the signaling contact does
Green On Power supply is monitored.
If the power supply falls below 17 V, the signaling contact re-