Siemens SCALANCE X-300 Series - Other Properties

Device variant Fiber-optic cable type Permitted cable length Attenuation
X308-2LH 9/125 µm
single mode fiber
to 40 km ≤0.4 dB/km at 1550 nm; maximum insertion loss
0.5 dB; 18 dB max. permitted FO cable attenuation at
2 dB link power margin; minimum cable attenuation
3 dB
X308-2LH+ 9/125 µm
single mode fiber
to 70 km ≤0.28 dB/km at 1550 nm; maximum insertion loss
0.5 dB; 21 dB max. permitted FO cable attenuation at
2 dB link power margin; minimum cable attenuation
8 dB
X310 - - -
8.2.4 Other properties
Switching properties
Max. number of learnable addresses 8000
Aging time 30 sec
Switching technique Store and forward
Latency 5 μs
Reconfiguration times for redundancy mechanisms
Redundancy mechanism Reconfiguration times
HRP 300 ms
Standby link 300 ms
MRP 200 ms
Mean time between failure (MTBF)
Device variant MTBF
1)
X304-2FE 55 years
X306-1LD FE 65 years
X307-3 40 years
X308-2 42 years
X307-3LD ,
X308-2LD,
X308-2LH,
X308-2LH+,
38 years
X310,
X310FE
45 years
X320-1 FE 35 years
X320-3LD FE 30 years
1)
These values apply at 40 °C.
Technical specifications
8.2 X-300 technical specifications
SCALANCE X-300
Operating Instructions, 11/2019, A5E01113043-24 159