Permitted cable lengths (fiber-optic cable) for the SFP media module
Media module
Property
Max. permittted cable length
MM992-4SFP
4 x 100/1000 Mbps,
SFP media module
Depending on the SFP transceiver used
Permitted cable lengths (fiber-optic cable - Fast Ethernet)
Media module
Property
Fiber
FO cable lengths
MM991-4
4 x 100 Mbps,
BFOC ports optical,
multimode glass,
up to max. 5 km
50/125 µm
multimode fiber
0-5 km
(1 dB/km at 1310 nm;
1200 MHz*km)
MM991-4LD
4 x 100 Mbps,
BFOC ports optical,
single mode glass,
up to max. 26 km
9/125 µm
single mode fiber
0-26 km
(0.5 dB/km at 1310 nm)
Permitted cable lengths (fiber-optic cable - gigabit Ethernet)
Media module
Property
Fiber
FO cable lengths
MM992-4
4 x 1000 Mbps,
SC ports optical,
multimode glass,
up to max. 750 m
62.5/125 µm
multimode fiber
0-350 m
(3.1 dB/km at 850 nm;
1200 MHz*km)
50/125 µm
multimode fiber
0-750 m
(2.5 dB/km at 850 nm;
1200 MHz*km)
MM992-4LD
4 x 1000 Mbps,
SC ports optical,
single mode glass,
up to max. 10 km
9/125 µm
single mode fiber
0-10 km
(0.5 dB/km at 1310 nm)
8.3
Other properties
Table 8-1
Mean time between failure (MTBF)
Device version (power supply)
MTBF
MM992-4CU
MM992-4CUC
> 200 years
MM991-4,
> 90 years
MM991-4LD
> 70 years
MM992-4LD
> 75 years
MM992-4
> 85 years
Technical data
8.3 Other properties
MM900 media modules for SCALANCE XR-500M
34
Compact Operating Instructions, 04/2022, A5E03275846-05
