Siemens SIMADYN D Hardware Manual page 296

Operator control panel OP2
Bus connection
and cable
10-28
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The connection is realized via a 9-pin sub-D connector with the following
circuit configuration:
A) Connection as a node (station) at the center of the BUS
(3)
DATA B
(8)
DATA A
9-pin sub-D
B) Connected as node at the end of the BUS (with bus termination
(6)
(3)
(8)
(5)
9 polig Sub-D
-
A bus terminating resistor network must be installed in connector 4 (refer
to the appropriate information specified with communications module SS4)
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+5 V
390 Ω
Data B
150 Ω
Data A
390 Ω
End
Industry Automation
B
A
BUS cable
B
A
):
BUS-Kabel
P
N
Hardware - SIMADYN D
Edition 03.2001
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