2.3.2 Potential free RS485 PROFIBUS Interface (X2)
The RS485-interface has the connector with the pinout in accordance with the
PROFIBUS standard EN 50170. There is no configuration necessary.
5
8
2
3
7
6
3
6
1
4
3
1
2
6
7
P9604S21.HP
VP
&
&
R37
X2
X2
&
U3
R33
X2
X2
X2
N3
R23
R35
R3
R31
R24
R32
R1
R2
D
DE
R
RE
A
B
HCPL7101
HCPL7101
1,2k
HCPL0601
100
SN75ALS176
470
680
1,2k
100k
470
100k
470
1,2k
RXD/TXD-N
ISO+5V
ISO+5V
ISO+5V
ISO+5V
DGND
DGND
+5V
+5V
GND
RGND2
RXD/TXD-P
ISOGND
ISOGND
ISOGND
TX
RTS
RX
RS485-PROFIBUS-interface at connector X2
Resistors R31 and R32 set a closed level on the RS485 bus. This ensures a de-
fined level when the plugs are removed.
The cable shield of the bus plug is directly connected to the case of the converter.
The grounding follows over the chasis of the PKV.
The PROFIBUS can only con-
nected at connector X2.
General device description
11
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