BECKHOFF BK2000 User Manual
Page 8
Basic information
8
BK2000
Field bus connection
Beckhoff-Lightbus fiber-
optic conductor ring
Beckhoff Z1000 connector
There is a recessed front surface on the left-hand side. The typical
Beckhoff-Lightbus connectors can be inserted here. The Beckhoff-Lightbus
consists of a fiber-optic conductor ring into which the bus coupler is
inserted. In doing so, the connector out of which red light emerges when
the Beckhoff-Lightbus is switched on must be inserted in the top socket. In
the illustration, this is marked "IN". You need a fiber-optic conductor
connector type Beckhoff Z1000 for connection.
Configuration interface
Serial interface under the
front flap
On the lower part of the front face you will find the standbus couplers which
are fitted with an RS232 interface. The miniature plug can be attached to a
PC by means of a connection cable and the configuration software
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 ADS communications.
K-bus contacts
6 contacts at the side
The connections between the bus coupler and the bus terminals are
effected 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
terminals, 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
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.
Setting up the power levels
in the bus terminal system