Siemens SCALANCE MM900 Compact Operating Instructions page 40

Technical data
5.3 Cable lengths
Media module Fiber-optic cable type
MM991-2LH+ 9/125 µm
(SC) single mode fiber
MM991-2P 980/1000
plastic optical fiber
200/230
polymer cladded fiber
Table 5- 13 Permitted cable lengths (fiber-optic cable - gigabit Ethernet)
Media module Fiber-optic cable
type
MM992-2 62.5/125 µm
multimode fiber
MM992-2 (C)
50/125 µm
multimode fiber
MM992-2LD 9/125 µm
single mode fiber
MM992-2LH 9/125 µm
single mode fiber
MM992-2LH+ 9/125 µm
single mode fiber
MM992-2ELH 9/125 µm
single mode fiber
Copper / fiber-optic cables
Table 5- 14
Media module
MM992-2SFP
You will find further information in the compact operating instructions "Transceiver SFP/SFP+".
*)
Attenuators
Transceivers of the types LH, LH+, ELH and ELH200 are designed for long distances and
therefore send more power than they can receive.
If you establish a connection between such transceivers with a short cable length, use
attenuators. Attenuators increase the attenuation and therefore protect the receiving diode.
40
Max. permitted
cable length
70 km
50 m
100 m
Max. permitted
cable length
350 m
750 m
10 km
40 km
70 km
120 km
Permitted cable lengths (copper cable/fiber-optic cable) for the SFP media module
Max. permitted cable length
Depending on the SFP transceiver used.
*)
Attenuation
≤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
9 dB max. permitted FO cable attenuation with 3 dB link
power margin
6 dB max. permitted FO cable attenuation with 3 dB link pow-
er margin
Attenuation
≤3.1 dB/km at 850 nm; 1200 MHz×km; maximum insertion
loss 0.5 dB; 4.5 dB max. permitted FO cable attenuation at
3 dB link power margin
≤2.5 dB/km at 850 nm; 1200 MHz×km; maximum insertion
loss 0.5 dB; 4.5 dB max. permitted FO cable attenuation at
3 dB link power margin
≤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 mar-
gin
≤0.4 dB/km at 1550 nm; maximum insertion loss 0.5 dB;
18 dB max. permitted FO cable attenuation at 2 dB link pow-
er margin, minimum cable attenuation 3 dB
≤0.28 dB/km at 1550 nm; maximum insertion loss 0.5 dB;
21 dB max. permitted FO cable attenuation at 2 dB link pow-
er margin, minimum cable attenuation 8 dB
≤0.225 dB/km at 1550 nm; maximum insertion loss 0.5 dB;
27 dB max. permitted FO cable attenuation at 2 dB link pow-
er margin, minimum cable attenuation 8 dB
Compact Operating Instructions, 05/2016, A5E02630805-12
SCALANCE MM900