Configuration Options With The Rs 485 Repeater - Siemens SIMATIC RS 485 Manual

Connecting

5.4 Configuration options with the RS 485 repeater

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
● 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
Figure 5-2
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
Figure 5-3
22
the RS 485 repeater.
on
Setting of the terminating resistor
Bus segment 2
Connecting two bus segments to the RS 485 repeater
Terminating resistor
on
NOT activated
Bus segment 1
R
Bus segment 2
Terminating resistor
Bus segment 1
enabling
Terminating resistor
Bus segment 2
enabling
RS 485 Repeater
Manual, 02/2011, A5E03382072-01