Description of the device
3.3 LED display
SCALANCE XR-500
20
Operating Instructions, 05/2014, A5E03275845-05
Setting the display mode
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
LED status
Display mode
DM1
DM2
-
Off
Display mode A
Press once
On
Off
Display mode B
Press twice
Off
On
Display mode C
Press three times
On
Display mode D
Press four times
Flashing
Off
Display mode E
3.3.5
"L1" and "L2" LEDs for the power supply
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
""DM1" and "DM2" LEDs for the display mode (Page 19)".
Voltage limit
For devices with 24 VDC, the voltage limit is 17 VDC.
With devices with 100 to 240 VAC, the voltage limit is 90 VAC.
Meaning in display modes A, B, C and E
In display modes A, B, C and D, from the "L1" and "L2" LEDs you can see whether the
power supply is higher or lower than a certain voltage limit.
Table 3- 1
For devices with a 24 VDC power supply
L1/L2 LED
L1/L2 connector
LED color
LED status
-
Off
Power supply lower than 17 VDC
Green
On
Power supply higher than 17 VDC
Table 3- 2
Power supply for devices with 100 to 240 VAC
L1/L2 LED
L1/L2 connector
LED color
LED status
-
Off
Power supply lower than 90 VAC
Green
On
Power supply higher than 90 VAC
