PROFIBUS Bus Couplers BK3010, BK3100, BK3110
Power LEDs
Bus Coupler
Input for
power contacts
Power contacts
Fieldbus connection
Address selector
Configuration interface
Address selector

BK3010, BK3100, BK3110 | PROFIBUS Bus Couplers

PROFIBUSThe BK3010, BK3100 and BK3110 Bus Couplers connect the PROFIBUS system to the electronic terminal blocks, which can be extended in modular fashion. One unit consists of the Bus Coupler, any number of up to 64 terminals and one end terminal. The BK3010 and BK3110 economy variants permit particularly economical creation of peripheral interfacing connections. Up to 64 digital input/output terminals can be connected.

The Bus Coupler recognises the connected terminals and automatically generates the affiliations of the inputs/outputs to the bytes of the process image. The first input/output signal is inserted in the first bit of one byte (LSB), beginning from the left. The Bus Coupler inserts further signals in this byte. Inputs and outputs are clearly separated. The Bus Coupler automatically begins a further byte if the number of inputs or outputs exceeds 8 bits.

The Beckhoff GSE and type data files to the Bus Couplers support the Bus Terminal options and can be loaded in the corresponding master configuration software to facilitate planning and design. Various configurations and parameters for the Bus Coupler can be selected via GSE and type data files.

System data PROFIBUS | BK3010, BK3100, BK3110
Number of I/O stations 100 with repeater
Number of I/O points approx. 6,000, depending on the master
Data transfer medium shielded copper cable, 2 x 0.25 mm²
Max. cable length
1,200 m 1,000 m 400 m 200 m 100 m
Data transfer rates
93.75 kbaud
187.5 kbaud 500 kbaud 1,500 kbaud …3, 6, 12 Mbaud
Data transfer time
approx. 3 ms (10 stations for 32 bit input and output each) approx. 0.5 ms
Technical data BK3010 BK3100 BK3110
Number of Bus Terminals 64
Max. number of bytes fieldbus 64 byte input and 64 byte output 64 byte input and 64 byte output (DP and FMS mode), 128 byte input and 128 byte output (only DP mode) 64 byte input and 64 byte output
Digital peripheral signals 512 inputs/outputs
Analog peripheral signals 64 inputs/outputs (only DP mode)
Configuration possibility via KS2000 or the controller
Data transfer rates automatic detection up to max. 1.5 Mbaud automatic detection up to 12 Mbaud automatic detection up to 12 Mbaud
Bus interface 1 x D-sub 9-pin socket with shielding
Power supply 24 V DC (-15 %/+20 %)
Input current 70 mA + (total K-bus current)/4, 500 mA max.
Starting current 2.5 x continuous current
Recommended fuse ≤ 10 A
Current supply K-bus 500 mA 1750 mA 500 mA
Power contacts 24 V DC max./10 A max.
Electrical isolation 500 V (power contact/supply voltage/fieldbus)
Weight approx. 150 g approx. 170 g approx. 150 g
Operating/storage temperature 0…+55 °C/-25…+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
KS2000 configuration software for extended parameterisation
Cordsets cordsets and connectors
FC310x PC Fieldbus Cards with PCI interface
Ordering information Description
BK3010 PROFIBUS Bus Coupler for up to 64 digital Bus Terminals, 1.5 Mbaud
BK3100 PROFIBUS DP/FMS Bus Coupler for up to 64 Bus Terminals, 12 Mbaud
BK3110 PROFIBUS Bus Coupler for up to 64 digital Bus Terminals, 12 Mbaud
BK3120 PROFIBUS “Economy plus” Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension), 12 Mbaud
BK3150 PROFIBUS “Compact” Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension), 12 Mbaud
BK3520 PROFIBUS “Economy plus” Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension), 12 Mbaud
LC3100 PROFIBUS “Low Cost” Bus Coupler for up to 64 digital Bus Terminals, 12 Mbaud
BC31x0, BX3100 PROFIBUS Bus Terminal Controller
CX8031 PROFIBUS Embedded PC, slave
PROFIBUS For further PROFIBUS products please see the system overview