Siemens MICROMASTER 420 Bedienungsanleitung Seite 26

Using the RS485 Bus Terminator
MICROMASTER 420/430/440
Biasing
Low Volts Power Terminals
Figure 1.
First Client
RS485 Terminator
Figure 2.
26
1
P10
2
0 V
PLC
RS485 Terminator
1.5 kΩ
120 Ω
470 Ω
Last Client
RS485 Bus
MICROMASTER 420/430/440 — Getting Started — 01/18 — A5E02779537A-AF
MICROMASTER 430/440
MICROMASTER 420
14
P+
15
N-
Communication
RS485 Terminator
29
30
RS485 Bus