ABB Relion 670 series - Error Messages in Central Account Management

7.2 Optical budget calculation for serial communication with
LON
M11737-4 v2
Table 19: Example
Distance 1 km
Glass
Distance10 m
Plastic
Maximum attenuation -11 dB - 7 dB
4 dB/km multi mode: 820 nm - 62.5/125 um 4 dB -
0.3 dB/m plastic: 620 nm - 1mm - 3 dB
Margins for installation, aging, and so on 5 dB 2 dB
Losses in connection box, two contacts (0.75 dB/contact) 1.5 dB -
Losses in connection box, two contacts (1dB/contact) - 2 dB
Margin for repair splices (0.5 dB/splice) 0.5 dB -
Maximum total attenuation 11 dB 7 dB
Section 7 1MRK 504 165-UUS Rev. J
Establishing connection and verifying the LON communication
64 Transformer protection RET670
Commissioning manual
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