BECKHOFF BK7300 - Manual (Page 14)

Basic information
10 BK7300
Electrical data
The MODBUS – the fieldbus-specific electrical data is listed in this section.
The following table gives an overview of all the data:
Technical data BK7300
Supply voltage 24 V DC
Input current 70mA +
(total K-bus current)/4
500 mA max.
Power-on surge 2.5 x steady operating current
K bus supply
current up to 1750 mA max.
Configuration
facility via KS2000 or the controller
Number of bus
terminals 64
Digital peripheral
signals 256 inputs/outputs
Analogue peripheral
signals 128 inputs/outputs
Baud rate From 150 baud to 38400 baud
Protocol RTU and ASCII
Bus connection D-Sub RS 485
9-pin
Voltage of the
power contact 24 V DC / AC max.
Power contacts
current drawn 10 A max.
Electric strength 500 V (power contact / supply voltage / fieldbus)
none
Typical weight 170 g
Operating
temperature 0°C ... +55°C
Storage
temperature -20°C ... +85°C
Relative humidity 95% without dew formation
Vibration/shock
stability according to IEC 68-2-6 / IEC 68-2-27
EMC immunity/
transmission according to EN 50082 (ESD, burst) / EN 50081
Installation location Any
Protection class
IP20
Current consumption on the
K-Bus
For operation of the K-bus electronics, the bus terminals require energy
from the K-bus that is supplied by the bus coupler. Refer to the catalogue
or the corresponding data sheets of the bus terminals for details of the K-
bus current consumption. In doing so, pay attention to the maximum output
current of the bus coupler that is available for powering the bus terminals.
Using a special power supply terminal (KL9400), power can be fed back
into the K-bus at any chosen point. If you wish to use a power supply
terminal, please contact Beckhoff’s technical support.
The peripheral data in the process image
When the bus coupler is first switched on it determines the configuration of
the attached input/output terminals and automatically assigns the physical
slots of the input/output channels to the addresses in the process image.
The bus coupler sets up an internal list of assignments in which each of the
input and output channels has a specific position in the process image. A