Networking

5-9

AutomationSystem S7-400 Hardwareand Installation
A5E00850741-01
TerminatingResistor on the Bus Connector
on
off
on
off
Terminating
resistor
switched on
Terminating
resistor
switched off
Figure 5-3 Terminatingresistor on bus connector
TerminatingResistor on the RS 485 Repeater
DC
24
V
L+ M PEM5.2
A1B1 A1B1
A2B2A2B2
SIEMENS
RS485-REPEATER
ON
ON Terminatingresistor
for bus segment 1
Terminatingresistor
for bus segment 2
Figure 5-4 Terminatingresistor on RS 485 repeater