BECKHOFF BC7300 - Manual (Page 10)

Basic Principles
BC7300 10
Configuration and programming interface
Serial interface under the
front cover The standard Bus Terminal Controllers have an RS232 interface at the
bottom of the front face. The miniature connector can be joined to a PC
with the aid of a connecting cable and either the KS2000 configuration
software or TwinCAT BC. The interface allows the analog channels to be
configured with the KS2000 software. The BC7300 is programmed via the
same interface.
KS2000 Software
In order to link the MODBUS BK7300 Bus Terminal Controller and the
KS2000 configuration software, the coupler's address selection switch
must be set to "00", and it must be restarted (i.e. the coupler must be
switched off and then on again). The MODBUS must not be connected.
TwinCAT BC
In order to link the MODBUS BK7300 Bus Terminal Controller and the
TwinCAT BC programming software, the coupler's address selection switch
must be set to "00", and it must be restarted (i.e. the coupler must be
switched off and then on again). The MODBUS must not be connected.
K-Bus Contacts
6 contacts on the side
In order to connect the Bus Coupler and Bus Terminals the Bus Coupler
has gold contacts on the right hand side. When the Bus Terminals are
pushed together the gold contacts automatically make the connection
between the Bus Terminals. The voltage supply to the K-Bus electronics in
the Bus Terminals and the data exchange between the Bus Coupler and
the Bus Terminals is carried out by the K-Bus. A part of the data exchange
takes place via a ring structure within the K-Bus. Opening the K-Bus, e.g.
by pulling out one of the Bus Terminals, opens the ring. Data exchange is
no longer possible. Special mechanisms nevertheless allow the Bus
Coupler to identify the location of the interruption and to report it.
Electrical isolation
3 potential groups:
Fieldbus
K-Bus
Peripheral level The Bus Terminal Controllers operate by means of three independent
potential groups. The supply voltage feeds the K-Bus electronics in the Bus
Terminal Controller and the K-Bus itself, which is electrically separate. The
supply voltage is also used to generate the operating voltage for the
fieldbus.
Remark: All the Bus Terminals are galvanically isolated from the K-Bus.
The K-Bus is thus galvanically isolated from everything else.