Siemens Automation System S7-400 - Manual (Page 107)

Networking
5-9
Automation System S7-400 Hardware and Installation
A5E00850741-01
Terminating Resistor on the Bus Connector
on
off on
off
Terminating
resistor
switched on
Terminating
resistor
switched off
Figure 5-3 Terminating resistor on bus connector
Terminating Resistor on the RS 485 Repeater
DC
24
V
L+ M PE M 5.2
A1 B1 A1 B1
A2 B2A2 B2
SIEMENS
RS 485-REPEATER
ON
ON
Terminating resistor
for bus segment 1
Terminating resistor
for bus segment 2
Figure 5-4 Terminating resistor on RS 485 repeater