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Des.
US1
US2
FAIL
LNK
(Link)
An additional LED is located on the front of the SMN for each port. The function of the second LED (MODE) for each port
can be set using the MODE switch (see also example below). There are three options (during the boot process the mode
and port LEDs are permanently on):
ACT
(Activity)
SPD
(Speed)
FD
(Duplex)
FO
(Fiber Optic)
ACT/SPD/FD
8089_en_03
1.2
Status and diagnostics indicators
Please note that the meaning of the LEDs differs in Smart mode (see "Using Smart mode"
on page 20).
Color
Status
Meaning
Green
On
Supply voltage 1 within the tolerance range
Off
Supply voltage 1 too low
Green
On
Supply voltage 2 within the tolerance range
Off
Supply voltage 2 too low
Red
On
Signal contact open, i.e., an error has occurred
Off
Signal contact closed, i.e., an error has not occurred
A Link LED is located on the front of the SMN for each port
Green
On
Link active
Off
Link not active
Green
On
Transmitting/receiving telegrams
Off
Not transmitting/receiving telegrams
Green
ON (green) 100 Mbps
Off
10 Mbps if Link LED is active (for RJ45 ports only)
Green
On
Full duplex
Off
Half duplex
Orange
Off
The system reserve of the optical path is >2 dB
Flashing
The system reserve of the optical path is between 2 dB and 0 dB
0.5 Hz
Flashing
The system reserve of the optical path is <0 dB
2 Hz
On
Diagnostic alarm
Yellow
Flashing
Switch is in Smart mode (see "Using Smart mode" on page 20)
Smart Managed Narrow Switch
PHOENIX CONTACT
13
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