Optical Budget Calculation For Serial Communication With Lon - ABB rec670 Commissioning Manual

Section 7
Establishing connection and verifying the LON communication
Table 14: ADE Non group settings (basic)
Name
Operation
TimerClass
7.2
64
Path in the local HMI under Main menu/Configuration/Communication/SLM
configuration/Rear optical LON port
Values (Range) Unit
Off -
On
Slow -
Normal
Fast
Path in the local HMI under Main menu/Configuration/Communication/SLM
configuration/Rear optical LON port
Table 15: LON commands
Command Command description
ServicePinMsg Command with confirmation. Transfers the node address to the LON Network Tool.
Optical budget calculation for serial communication
with LON
Table 16: 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 Default
- Off
- Slow
1MRK 511 360-UEN A
Description
Operation
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
Bay control REC670 2.1 IEC
Commissioning manual