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BC8000, BC8050, BC8100, BC8150 | RS485/RS232 Bus Terminal Controllers

The Bus Terminal Controllers BC8000 and BC8100 are Bus Couplers with integrated PLC functionality and have a free serial interface. In the case of the BC8000 controller it is an RS485 interface, through which a number of serial devices can be addressed. The BC8100 controller has a RS232 interface, with which peer-to-peer connection is possible. The programmable interface is suitable for the connection of serial devices. The protocol can be freely programmed, so that displays, scanners, measuring systems, BK8x00 or a PC can be connected. The serial interface then functions as a master. A serial terminal, which is removed after the programming, is needed in order to test the interface.

The “Compact” Bus Terminal Controllers BC8050 with serial RS485 interface and BC8150 with serial RS232 interface extend the Beckhoff small controller series by cost-optimised versions in a compact housing. An open serial protocol – like in the BK8x00 Bus Couplers – and the Modbus RTU/ASCII protocol are implemented. The address and the protocol are selected via the two rotary selection switches.

Controller for stand-alone applications

The Bus Terminal Controller is programmed using the TwinCAT programming system conforms to IEC 61131-3. The PLC programs can be written in five different programming languages (IL, FBD, LD, SFC, ST). In addition, TwinCAT offers extensive debug functionalities (breakpoint, single step, monitoring, …), which facilitate commissioning. It is also possible to perform adjustment and measurement of the cycle time. The inputs and outputs of the connected Bus Terminals are assigned in the PLC.

Data is exchanged with the interface on the Bus Terminal Controller with the aid of a control and status byte, through which a handshake must be executed. A serial communication function block for TwinCAT is available for this purpose.

 

 

PLC dataRS485 | BC8000RS485 | BC8050RS232 | BC8100RS232 | BC8150
Programming TwinCAT (via programming interface or fieldbus)
Program memory 32/96 kbytes 48 kbytes 32/96 kbytes 48 kbytes
Data memory 32/64 kbytes 32 kbytes 32/64 kbytes 32 kbytes
Remanent data 512 bytes 2 kbytes 512 bytes 2 kbytes
Runtime system 1 PLC task
PLC cycle time approx. 3 ms for 1,000 instructions (without I/O cycle, K-bus)
Programming languages IEC 61131-3 (IL, LD, FBD, SFC, ST)
Online change yes yes

 

Technical dataBC8000BC8050BC8100BC8150
Number of Bus Terminals 64 64 (255 with K-bus extension) 64 64 (255 with K-bus extension)
Max. number of bytes fieldbus 512 byte input and 512 byte output
Max. number of bytes process image 512 byte input and 512 byte output
Digital peripheral signals 512 inputs/outputs 1,020 inputs/outputs 512 inputs/outputs 1,020 inputs/outputs
Analog peripheral signals 128 inputs/outputs
Protocol KS8000 protocol (open, serial protocol), customised serial protocols can be implemented. KS8000 protocol (open, serial protocol) – Modbus RTU/Modbus ASCII can be selected via address switch, serial ADS. KS8000 protocol (open, serial protocol), customised serial protocols can be implemented. KS8000 protocol (open, serial protocol) – Modbus RTU/Modbus ASCII can be selected via address switch, serial ADS.
Data transfer rates 1.2 kbaud…57.6 kbaud 1.2 kbaud…38.4 kbaud 1.2 kbaud…57.6 kbaud 1.2 kbaud…38.4 kbaud
Bus interface RS485 D-sub RS485 D-sub RS232 D-sub RS232 D-sub
Power supply 24 V DC (-15 %/+20 %)
Input current 70 mA + (total K-bus current)/4, 500 mA max. 320 mA max. 70 mA + (total K-bus current)/4, 500 mA max. 320 mA max.
Starting current 2.5 x continuous current
Current supply K-bus 1,750 mA 1,000 mA 1,750 mA 1,000 mA
Power contacts 24 V DC max./10 A max.
Electrical isolation 500 V (power contact/supply voltage)
Weight approx. 170 g approx. 100 g approx. 170 g approx. 100 g
Operating/storage temperature 0…+55 °C/-25…+85 °C -25…+60 °C/-40…+85 °C 0…+55 °C/-25…+85 °C -25…+60 °C/-40…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Approvals CE, UL, Ex, GL CE, UL CE, UL, Ex, GL CE, UL, Ex

 

Accessories 
KS2000 configuration software for extended parameterisation
TwinCAT PLC programming system conforms to IEC 61131-3
TwinCAT PLC Serial Communication IEC 61131-3 software library for TwinCAT PLC for communication via serial devices
KL6001-0020 RS232 Bus Terminal for testing the serial interface with 5 bytes of user data
KL6021-0020 RS485 Bus Terminal for testing the serial interface with 5 bytes of user data
Cordsets cordsets and connectors

 

Ordering informationDescription
BC8000 RS485 Bus Terminal Controller for up to 64 Bus Terminals
BC8050 RS485 “Compact“ Bus Terminal Controller for up to 64 Bus Terminals (255 with K-bus extension)
BC8100 RS232 Bus Terminal Controller for up to 64 Bus Terminals
BC8150 RS232 “Compact“ Bus Terminal Controller for up to 64 Bus Terminals (255 with K-bus extension)
BX8000 RS232/RS485 Bus Terminal Controller for up to 64 Bus Terminals (255 with K-bus extension)
BK8x00 RS232/RS485 Bus Coupler

 

Related products 
IL230x-C810 RS232 PLC Box with IP-Link extension interface, IP 67

 

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