Technical data

Connecting
5.4 Configuration options with the RS 485 repeater
RS 485 Repeater
22 Manual, 02/2011, A5E03382072-01
5.4 Configuration options with the RS 485 repeater
Overview
The following section explains the configurations in which you can use the RS 485 repeater:
● Bus segment 1 and bus segment 2 terminated on the RS 485 repeater.
● Bus segment 1 terminated on the RS 485 repeater and bus segment 2 looped through on
the RS 485 repeater.
● Bus segment 1 and bus segment 2 looped through on the RS 485 repeater.
Terminating resistor on/off
the following figure shows the setting for the terminating resistor:
Terminating resistor
activated
Terminating resistor
NOT activated
on
on
Figure 5-2 Setting of the terminating resistor
Bus segments 1 and 2 terminated
The following figure shows how to connect the RS 485 repeater to the ends between two bus
segments:
Bus segment 1
Terminating resistor
Bus segment 1
enabling
Terminating resistor
Bus segment 2
enabling
Bus segment 2
Bus segment 2
Bus segment 1
R
Figure 5-3 Connecting two bus segments to the RS 485 repeater