Description of the device
3.3 LED display
SCALANCE XR-500
30
Operating Instructions, 05/2017, A5E03275845-11
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
Meaning in display mode D
In display mode D, the "L1" and "L2" LEDs indicate whether the power supply is monitored.
Table 3- 3
Monitoring for devices with 24 VDC
L1/L2 LED
L1/L2 connector
LED color
LED status
-
Off
Power supply is not monitored.
If the power supply falls below 17 VDC, the signaling contact does
not respond.
Green
On
Power supply is monitored.
If the power supply falls below 17 VDC, the signaling contact
responds.
Table 3- 4
Monitoring for devices with 100 to 240 VAC
L1/L2 LED
L1/L2 connector
LED color
LED status
-
Off
Power supply is not monitored.
If the power supply falls below 90 VAC, the signaling contact does
not respond.
Green
On
Power supply is monitored.
If the power supply falls below 90 VAC, the signaling contact re-
sponds.