BECKHOFF BC3100 - Manual (Page 6)

Basic information
6 BC3100
The K-bus
End terminal
The K-bus is the path taken by data within the terminal row. The bus
terminal controller carries the K bus through all the terminals by means of
six contacts on the side walls of the terminals, and the end terminal
terminates the K bus. The user does not need to know anything about the
function of the K bus or the internal operation of terminals and bus terminal
controllers. There are numerous software tools available which provide for
convenient planning, configuration and operation.
Power input terminals
for
separately powered groups
Three power contacts pass the operating power to the following terminals.
You can use power input terminals to subdivide the terminal row as desired
into groups, each with a separate power supply. These power input
terminals are not taken into account for addressing the terminals, you can
insert them at any position along the terminal row.
You can install up to 64 terminals on a terminal row, including power input
terminals and the end terminal.
The principle of the bus
terminal
for the input Bus end
BC3100 terminal
K- bus
Potential Power
isolation contacts
terminal
Profibus
Bus terminal
controller
BC3100
Powersupply Potential
BC
31
00
x1
x10
Additional characteristics of
the bus terminal controllers The bus terminal controllers (BC) differ from the bus couplers (BK) by
virtue of the fact that a real time PLC task runs in addition to processing of
the K-bus. Contrary to the bus couplers, by default the signals of the
terminals are processed by the PLC task while inputs and outputs of the
PLC task are then transmitted through the field bus. It is possible, however,
to split up terminals so that some terminals are preprocessed by the PLC
task, while others are forwarded directly via the field bus to the higher-level
system.
Bus terminal controllers for
various field bus systems
Various bus terminal controllers can be used to link the electronic terminal
strip with an integrated PLC task swiftly and easily to diverse field bus
systems. Later conversion to a different field bus system is also possible.
The bus terminal controller assumes all checking and control tasks that are
needed for operation of the connected bus terminals. The bus terminals
are operated and configured exclusively via the bus terminal controller. The
field bus, the K-bus and the I/O level are electrically isolated.