Optical Budget Calculation For Serial Communication With Lon - ABB RET670 Commissioning Manual

Section 7
Establishing connection and verifying the LON communication
7.2
70
Table 17: ADE Non group settings (basic)
Name Values (Range) Unit
Operation Off
On
TimerClass Slow
Normal
Fast
LON commands are available on the local HMI under Main menu/Configuration/
Communication/Station communication/Port configuration/SLM optical LON
pot/Service Pin Messae/Generate service pin message
Table 18: LON commands
Command Command description
ServPinMess Command with confirmation. Transfers the node address to the LON Network
Tool.
Optical budget calculation for serial communication
with LON
Table 19: Example
Maximum attenuation
4 dB/km multi mode: 820 nm - 62.5/125 um
0.3 dB/m plastic: 620 nm - 1mm
Margins for installation, aging, and so on
Losses in connection box, two contacts (0.75 dB/contact)
Losses in connection box, two contacts (1dB/contact)
Margin for repair splices (0.5 dB/splice)
Maximum total attenuation
Step
- -
- -
Transformer protection RET670 2.2 IEC
1MRK 504 165-UEN A
Default Description
Off Operation
Slow Timer class
Distance 1 km Distance10 m
Glass Plastic
-11 dB - 7 dB
4 dB -
- 3 dB
5 dB 2 dB
1.5 dB -
- 2 dB
0.5 dB -
11 dB 7 dB
Commissioning manual
M11737-4 v2