Table 7-13 Permitted cable lengths (fiber-optic cable - gigabit)
Device variant Fiber-optic cable type Permitted cable length Attenuation
X307-3,
X308-2
62.5/125 µm
multimode fiber
0 to 350 m ≤3.1 dB/km at 850 nm; 1200 MHz×km; maximum in‐
sertion loss 0.5 dB; 4.5 dB max. permitted FO cable
attenuation at 3 dB link power margin
50/125 µm
multimode fiber
0 to 750 m ≤2.5 dB/km at 850 nm; 1200 MHz×km; maximum in‐
sertion loss 0.5 dB; 4.5 dB max. permitted FO cable
attenuation at 3 dB link power margin
X307-3LD
X308-2LD
9/125 µm
single mode fiber
0 to 10 km ≤0.5 dB/km at 1310 nm; maximum insertion loss 0.5
dB; 6 dB max. permitted FO cable attenuation at 3 dB
link power margin
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 - - -
Technical data
7.3 Cable lengths
SCALANCE X-300
66 Compact Operating Instructions, 11/2019, A5E00982643-18
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