BECKHOFF BK5200 - Manual (Page 9)

Basic Principles
BK52x0 9
LC5200:
24V DC to the centre
terminal pairs
The LC5200 Bus Coupler is supplied via the two central terminal pairs. The
power contacts pass the supply voltage on to the field level.
Power contact feed points
Bottom 3 terminal pairs for
feed
Maximum 24 V
Maximum 10 A The bottom six connections with spring-loaded terminals can be used to
feed the supply for the peripherals. The spring-loaded terminals are joined
in pairs to a power contact. The feed for the power contacts has no
connection to the voltage supply for the bus coupler (BK52x0). The design
of the feed permits voltages of up to 24 V. The assignment in pairs and the
electrical connection between feed terminal contacts allows the connection
wires to be looped through to various terminal points. The current drawn
from the power contact must not exceed 10 A for long periods. The current
rating between two spring-loaded terminals is identical to that of the
connecting wires.
Power contacts
Spring contacts on the side On the right hand face of the Bus Coupler there are three spring contacts
for the power contact connections. The spring contacts are hidden in slots
so that they can not be accidentally touched. By attaching a Bus Terminal
the blade contacts on the left hand side of the Bus Terminal are connected
to the spring contacts. The tongue and groove guides on the top and
bottom of the Bus Coupler and of the Bus Terminals guarantees that the
power contacts mate securely.
Fieldbus connection
BK5200, BK5210: 5 pin
open style connector The BK52x0 Bus Couplers have a recessed front surface on the left hand
side. The DeviceNet connection plug can be inserted here. A full
description of the fieldbus interfaces is found elsewhere in this manual.
LC5200: Bus connection
via spring loaded terminals In the LC5200 Bus Coupler the bus is connected directly at the upper
terminal pair.
Configuration interface
Serial interface under the
front cover The BK52x0 Bus Couplers have an RS232 interface at the bottom of the
front face, whereas on the LC5200 it is located under the cover on the side.
The miniature connector can be joined to a PC with the aid of a connecting
cable and the KS2000 configuration software. The interface allows the
analog channels to be configured and also permits firmware updating.
The functionality of the configuration interface can also be reached via the
fieldbus using the object attributes for the register communication.
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.