SIEMENS
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Siemens IK PI · 2015
PROFIBUS
Electrical networks (RS485)
Bus terminals
3
■
Function
•
Connection of stations by means of integrated connecting
cable with Sub-D plug.
•
Easy connection of the bus cable by means of terminal block
•
No interruption of bus if an end user station is missing
•
Bus termination is possible by means of an integrated combi-
nation of terminating resistors.
The following additionally applies to the bus terminal 12M:
•
Clear location of faulty termination within a segment (incoming
and outgoing bus cables are separated when inserting the
resistor combination)
•
If the bus terminal 12M is used in a segment with RS485 bus
terminals, the configuration rules of the RS485 bus terminal
apply (see Manual for PROFIBUS Networks).
System connection with PROFIBUS bus terminals, e.g. for SIMATIC S7
Bus terminal
e.g. SIMATIC S7-300
with communications
processor
G_IK10_XX_50020
PROFIBUS
© Siemens AG 2014