ABB S800 I/O User Manual page 29

Figure 3-6
It shows the termination in the first and the last stations. At the first station the
terminator GND wire is connected to ground. At the last station the terminator GND
wire is not connected at all. It is only the outermost, that is, the first and the last
stations, on the bus segment that are terminated.
TC503
Termination
Unit
GND S2
Drain Wire
(shield)
< 50 mm
For detail information on designing the Advant Fieldbus 100, please refer to the
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information required to install and commission the system.
3BSE 020 925R101
Avryqiˆ†Ã8‚€€ˆvph‡v‚ÃD‡r…shprÃs‚…Ã6q‰h‡ÃAvryqiˆ†Ã
illustrates the termination of the Advant Fieldbus 100 twisted pair cable.
To first
Station
Drain Wire
(shield)
< 50 mm
_
_
TC505 Connection Unit
+ +
SH SH
+ +
SH SH
S1
_ _
IBM Type 1 Cable
Avtˆ…r "% 8‚rp‡v‚Ã9r‡hvy†Ã‡‚ÇurÃU8$$
Trunk
(1 - pair)
Max. 750 m (2450 ft)
which describes the equipment and contains
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Trp‡v‚Ã"  8D' 8D'!ÃA8D
Tap
To last
IBM Type 6 Cable
Station
(2 - pairs)
_
_
+ +
SH SH
TC503
Termination
Unit
+ +
SH SH
_ _
S1 S2
GND
connection in
one end only
GND
Ã
25