BECKHOFF BK7300 User Manual
Page 8
Basic information
4
BK7300
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
02
01
+ +
PE PE
WD
RX
TX
ERROR
MODBUS
B
E
C
K
H
O
F
F
24V
0V
0
9
8
7
6 5 4
3
2
1
0
9
8
7
6 5 4
3
2
1
K-Bus
Bus end
terminal
Potential
isolation
Potential
input
terminal
Power
contacts
Bus coupler
Bk7300
Power supply
for the
bus coupler
Bus couplers for various
fieldbus systems
You can use a variety of bus couplers to attach the electronic terminal row
quickly and easily to the various fieldbus systems, and you can also
subsequently convert to a different fieldbus system. The bus coupler deals
with all the necessary monitoring and control tasks for operating the
attached bus terminals, indeed all the operation and configuration of the
bus terminals is carried out via the bus coupler. The fieldbus, K bus and I/O
level are electrically isolated.
If the exchange of data across the fieldbus is temporarily interrupted, logic
states are preserved, digital outputs are cleared and analog outputs revert
to a reset value which can be individually configured for each output when
the equipment is set up.