BECKHOFF BC8000 - Manual (Page 13)

Basic information
BC8000 13
Technical / PLC Data
The electrical data of the RS485 bus terminal controller are presented in
this chapter. The bus terminal controller is set to 19,200 baud data rate.
Addresses from 0 to 99 are selectable via two address selectors on the
coupler. The following table gives an overview of all the data:
Technical data BC8000
Number of bus terminals 64
Digital
peripheral signals
256 inputs and outputs
Analogue peripheral signals 128 inputs and outputs
Peripheral bytes 512 inputs and 512 outputs
Electrical power supply 24 V (- 15% / +20%) EN 61131
Input current 70 mA + (total K bus current)/4
500 mA max.
Power-on surge 2.5 x steady operating current
K-bus output current 1750 mA max.
Connector 1 x D-sub plug, 9-pin
Voltage of the power contact 24 V DC / AC
Power contacts current
drawn
10 A
Voltage stability 500 Veff (power contact / supply voltage)
Typical weight 170 g
Operating temperature 0°C ... +55°C
Storage temperature -25°C ... +85°C
Relative humidity 95% without dew formation
Vibration/shock stability according to IEC 68-2-6 / IEC 68-2-27
EMC immunity, burst / ESD according to EN 61000-4-4 / EN 61000-4-2, limit values in accordance with
EN 50082-2
Installation location arbitrary
Protection class IP20
PLC data
Programmability via programming interface or RS485 interface (TwinCAT BC/TwinCAT)
Program size approx. 3000 PLC statements
Program memory 32 kbytes / 96 kbytes
Data storage 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: reserved
1 – 98: programming mode
99: interface available for the PLC program
Interface RS485
Baud rate 19,200 baud, 8 data bits, even parity, one stop bit
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 catalog 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.