Siemens S7-400PLC Especificaciones Pagina 410

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RS 485 repeater
10.5 Specifications
S7-400 Automation System Module Data
410 Reference Manual, Edition 09/2009, A5E00850736-06
Block diagram of the RS 485 repeater
Bus segments 1 and 2 are electrically isolated.
Bus segment 2 and the PG/OP socket are electrically isolated from each other.
Signals are amplified
Between bus segments 1 and 2
Between PG/OP socket and bus segment 2
5V
24 V
A2
B2
A2'
B2'
A1
B1
A1'
B1'
L+ (24 V)
M
A1
B1
5 V
M5 V
L+ (24 V)
M
PE
M 5.2
Logic
5V
24 V
1M
1M
-
++--
OFF
ON
OFF
+
ON
Segment 1 Segment 2
PG/OP-
socket
Figure 10-3 Block diagram of the RS 485 repeater
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