Remote bus
(Original Document)
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Introduction
INTERBUS has a hierarchical structure. The remote bus RB forms the main part of this ring. It covers the largest distance in the system. It is composed of segments connected by station headers.
Characteristics
The following table presents the characteristics of an INTERBUS bus supported by TSX IBY 100 / TSX IBX 100.
Physical characteristics
Maximum length of a segment
up to 400 m
Maximum length of cable between
the coupling card and the first station header of the remote bus
400 m
two station headers
400 m
the coupling card and the last station header of the remote bus
12.8 km
Transmission characteristics
Transmission method
RS 485 point to point link with the TSX IBY 100 / TSX IBX 100 module
Possible transmission supports
  • twisted pair line
  • fiber optic link
  • waveguide rail
  • infrared link
  • slip ring
Transmission rate
500 Kbits/s
Capacity
Number of branch levels per station header on the main RB bus
Maximum of 16
Number of station headers
  • Maximum of 254 on remote bus
Number of IBS inputs/outputs
  • Maximum of 2048 inputs and 2048 outputs for TSX IBY 100/IBX 100 modules less than version V3.0
  • 3872 inputs and 3872 outputs, up to a maximum total of 4096 inputs/outputs