ABB AC 800M User Manual page 43

Section 2 Transmission Technology
Table 6
reachable with the certain fibre media.
Media
Plastic fibre
Multi mode glass fibre
Single mode glass
fibre
PCF (HCS™)
The path attenuation per km or meter is derived from the difference between the
total admissible path attenuation minus the system reserve divided by the distance
involved. The data in parentheses are (total path attenuation / system reserve).
In a ring structure (see
bridgeable distance between two components is a function of the transmission
rate. A maximum of 15 km can be bridged at a transmission rate of 9.6 kBit/s; at
1.5 MBit/s, only 530 meters
For electrical media (half-duplex), an error in a single wire of the two-wire cable
blocks data transfer for both transmission directions. To get the same functional
behavior in case of a disturbed optical medium, the FO converter (full-duplex) must
be able to switch off the receiver port when detecting an error at the transmit port
and vice versa. Also hybrid cable, copper cables and fiber optic cables contained in
one cable, are available. This means that by using hybrid cables the data and the
power supply can be transferred together with one cable.
3BDS009029R5001 B
shows the different cable types, wave lengths and maximum distances,
Table 6. Basic data for fibre optic cable
Fibre/Sheath
Wavelength
diameter
980/1000 μm 0 ... 80 m (increased) 0.25 dB/m
660 nm
50/125 μm
860 nm
62.5/125 μm
62.5/125 μm
1310 nm
10/125 μm
200/230 μm
1530 nm
Redundant Optical Ring
Fibre optics cable type and speed
Max. distance
0 ... 2 km
0 ... 2.8 km
0 ... 10 km
0 ... 15 km
0 ... 30 m
on page 52), the maximum
Path attenuation
3 dB/km
3.5 dB/km
1 dB/km
0.5 dB/km
5
dB/km
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