Meaning in display modes A, B, C and E
In the display modes A, B, C and E, you can determine whether the power supply is
connected by observing LEDs "L1" and "L2" .
L1/L2 LED L1/L2 connector
LED color LED status
- O No external power supply connected
Green On Power supply connected to L1/L2
Meaning in display mode D
In display mode D, the "L1" and "L2" LEDs indicate whether the power supply is monitored.
L1/L2 LED L1/L2 connector
LED color LED status
- O Power supply is not monitored.
The signal contact does not respond if neither L1 nor L2 is connected
to an adequate power supply.
Green On Power supply is monitored.
The signal contact responds if neither L1 nor L2 is connected to an
adequate power supply.
4.7.5 "RM" LED
The "RM" LED indicates whether or not the device is a redundancy manager and whether or not
the ring is operating free of error.
LED color LED status Meaning
- O The device is not a redundancy manager.
Green On The device is a redundancy manager.
The ring is working without problems, monitoring is activated.
Green Flashing The device is a redundancy manager.
An interruption has been detected on the ring and the device has
switched through.
4.7.6 "SB" LED
The "SB" LED shows the status of the standby function.
LED color LED status Meaning
- O The standby function is disabled.
Green On The standby function is enabled. The standby section is passive.
Green Flashing The standby function is enabled. The standby section is active.
Description of the device
4.7LED display
SCALANCE XR-300
38 Operating Instructions, 03/2023, C79000-G8976-C586-02
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