BECKHOFF BK7000 - Manual (Page 8)

Basic information
7 BK 7000
Configuration interface
Serial interface under the
front flap On the lower part of the front face you will find the standard bus couplers
which are fitted with an RS232 interface. The miniature plug can be at-
tached to a PC by means of a connection cable and the configuration soft-
ware KS2000. This interface enables you to configure the analog channels.
You can also access the functionality of the configuration interface via the
fieldbus by means of the PLC interface communications.
K-bus contacts
6 contacts at the side
The connections between the bus coupler and the bus terminals are ef-
fected by gold contacts at the right-hand side of the bus coupler. 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 ter-
minals, and for the exchange of data between the bus coupler 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 coupler to
locate the interruption and report it.
Supply isolation
3 supply groups:
fieldbus
K-bus
peripheral level The bus couplers operate with three independent supplies. The input
power supplies the electrically isolated K-bus circuitry in the bus coupler
and the K-bus itself. The power supply is also used to generate the operat-
ing 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.
Setting up the power levels
in the bus terminal system
Periphery level
Bus terminals Bus coupler
Field bus
24 V DC
Terminal bus