Basic Principles
BC7300
14
Technical 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
BC7300
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
Analog 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 Veff (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
Vibrations/Shock resistance
conforms to IEC 68-2-6 / IEC 68-2-27
EMC resistance burst / ESD
conforms to EN 50082 (ESD, Burst) / EN 50081
Installation position
any
Type of protection
IP20
PLC data
Programmability
via programming interface (TwinCAT BC/TwinCAT)
Program size
approx. 3000 PLC statements
Program memory
32 kbytes / 96 kbytes
Data memory
32 kbytes / 64 kbytes
Remanent flags
512 bytes
Runtime system
1 PLC task
PLC cycle time
approx. 3 ms for 1000 instructions (including K-Bus I/O cycle)
Programming languages
IL, LD, FBD, SFC, ST
Station addresses
selectable to 99 via DIP switch
0 Programming mode and configuration mode
1 – 99 Slave address
Baud rate in programming
mode
19,200 baud, 8 data bits, even parity, one stop bit
Current consumption on
the K-Bus
The Bus Terminals require energy for the operation of the K-Bus
electronics, and this is supplied by the Bus Coupler. Find the current
consumption of the K-Bus from the catalogue, or from the appropriate data
sheets for the Bus Terminals. Consider the maximum output current of the
Bus Coupler that is available for supply of the Bus Terminals. A special
power supply terminal (KL9400) can be inserted at any location to insert
more power into the K-Bus. Refer to Beckhoff’s technical support
department regarding the use of a power supply terminal.
