Siemens SCALANCE X-300 Series

Table 8-105 Permitted cable lengths (copper cable - gigabit Ethernet)
Media module Cable Permitted cable length
MM992-2CUC
MM992-2CUC (C)
MM992-2CU
MM992-2M12 (C)
MM992-2VD (without
VD)
1) 2)
IE FC standard cable, 4×2, 24 AWG
IE FC flexible cable, 4×2, 24 AWG
with IE FC RJ-45 Plug 180,
4x2
0 to 90 m
IE FC standard cable, 4×2, 22 AWG with
IE FC Outlet RJ-45
+ 10 m TP cord
0 to 60 m
+ 10 m TP cord
IE FC flexible cable, 4×2, 22 AWG with IE
FC Outlet RJ-45
+ 10 m TP cord
0 to 90 m
+ 10 m TP cord
1)
The VD mode (Variable Distance) is turned off.
2)
If the VD mode is turned on, the speed is reduced to 100 Mbps. For permitted cable lengths, see table
Fast Ethernet.
Fiber-optic cables
Table 8-106 Permitted cable lengths (fiber-optic cable - Fast Ethernet)
Media module Fiber-optic cable type Max. permitted
cable length
Attenuation
MM991-2
(BFOC)
50/125 µm
multimode fiber
5 km ≤1 dB/km at 1300 nm;1200 MHz*km; maximum insertion loss
0.5 dB; 9 dB max. permitted FO cable attenuation at 3 dB link
power margin
62.5/125 µm multi‐
mode fiber
5 km ≤1 dB/km at 1300 nm; 1200 MHz*km; maximum insertion loss
0.5 dB; 9 dB max. permitted FO cable attenuation at 3 dB link
power margin
MM991-2FM
(BFOC)
50/125 µm
multimode fiber
5 km ≤1 dB/km at 1300 nm;1200 MHz*km; maximum insertion loss
0.5 dB; 9 dB max. permitted FO cable attenuation at 3 dB link
power margin
62.5/125 µm multi‐
mode fiber
5 km ≤1 dB/km at 1300 nm; 1200 MHz*km; maximum insertion loss
0.5 dB; 9 dB max. permitted FO cable attenuation at 3 dB link
power margin
MM991-2LD
(BFOC)
9/125 µm
single mode fiber
26 km ≤0.5 dB/km at 1310 nm; maximum insertion loss 0.5 dB; 14 dB
max. permitted FO cable attenuation at 2 dB link power margin
MM991-2 (SC) 50/125 µm
multimode fiber
5 km ≤1 dB/km at 1300 nm;1200 MHz*km; maximum insertion loss
0.5 dB; 9 dB max. permitted FO cable attenuation at 3 dB link
power margin
62.5/125 µm multi‐
mode fiber
5 km ≤1 dB/km at 1300 nm; 1200 MHz*km; maximum insertion loss
0.5 dB; 9 dB max. permitted FO cable attenuation at 3 dB link
power margin
MM991-2LD
(SC)
9/125 µm
single mode fiber
26 km ≤0.5 dB/km at 1310 nm; maximum insertion loss 0.5 dB; 14 dB
max. permitted FO cable attenuation at 2 dB link power margin
MM991-2LH+
(SC)
9/125 µm
single mode fiber
70 km ≤0.28 dB/km at 1550 nm; maximum insertion loss 0.5 dB; 26 dB
max. permitted FO cable attenuation at 2 dB link power margin,
minimum cable attenuation 3 dB
Technical specifications
8.9 MM900 technical specifications
SCALANCE X-300
208 Operating Instructions, 11/2019, A5E01113043-24