BECKHOFF BC3100 - Manual (Page 8)

Basic information
8 BC3100
bus terminal controller and bus terminals ensure reliable location of the
power contacts.
Fieldbus connection
9-pin
Sub-D female
connector
On the left-hand side there is a flat recessed area where you can plug in
the typical Profibus male connectors. You will find a detailed description of
the fieldbus interfaces in another part of this manual (In the chapter "The
transfer medium: plugs and cables“).
Configuration interface
Serial interface under the
front flap On the bottom side of the front area, the bus terminal controllers are
equipped with an RS 232 interface. The miniature connector can be
connected to a PC with a connecting cable and the KS2000 configuration
software. The interface permits configuration of the analog channels.
Depending on the scope of performance of the field bus, this functionality
can also be realized with field bus-specific functions.
The miniature connector also serves to connect to the TwinCAT PLC
programming environment on a PC. It is used to load, start and stop the
program, breakpoints are set and the program is run in the STEP mode
etc.
Depending on the scope of performance of the field bus and the availability
of a corresponding TwinCAT field bus interface, this functionality can also
be realized via the field bus, with the result that several bus terminal
controllers that are physically connected to the same field bus can be
operated without replugging an RS 232 connection. This feature is
currently not yet supported by TwinCAT.
K-bus contacts
6 contacts at the side
The connections between the BC3100 and the bus terminals are effected
by gold contacts at the right-hand side of the bus terminal controller. When
the bus terminals are plugged together, these gold contacts automatically
complete the connection to the bus terminals. The K-bus is responsible for
the power supply to the electronic components of the K-bus in the bus
terminals, and for the exchange of data between the BC3100 and the bus
terminals. Part of the data exchange takes place via a ring structure within
the K-bus. Disengaging the K bus, for example by pulling on one the bus
terminals, will break this circuit so that data can no longer be exchanged.
However, there are mechanisms in place which enable the bus terminal
controller to locate the interruption and report it.
Supply isolation
3 supply groups:
fieldbus
K-bus
peripheral level The BC3100 operate with three independent supplies. The input power
supplies the electrically isolated K-bus circuitry in the bus terminal
controller and the K-bus itself. The power supply is also used to generate
the operating power for the fieldbus.
Note: All the bus terminals are electrically isolated from the K bus, so that
the K-bus is completely electrically isolated.