CANopen Bus Coupler BK5120

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BK5120 | CANopen Bus Coupler

CANopenThe BK5120 “Economy plus” Bus Coupler connects the CAN bus system to the electronic 
terminal blocks, which can be extended in modular fashion. One unit consists of one Bus Coupler, any number 
of up to 64 terminals and one end terminal. With the K-bus extension technology, the BK5120 allows t
he connection of up to 255 spatially distributed Bus Terminals to one Bus Coupler.
The Bus Coupler works on the CAN protocol basis as defined in ISO 11898. In addition to network services, 
CANopen also determines the data allocation for automation systems applications and has established itself as
 an open CAN application layer. The Bus Coupler supports all types of CANopen communications and can also 
be used without difficulty in manufacturer-specific CAN environments due to the simple structure of this protocol 
definition. The firmware can be updated via the configuration interface.
Parameterising can also be carried out using any CANopen configuration tools. For this, EDS data files are available,
 which describe all the setting options for the CANopen coupler. For most applications, however, no configuration is 
necessary, as CANopen provides practical default values for all parameters.

System dataCANopen | BK5120
Number of I-O stations64 (BK5120: 255 with K-bus extension)
Number of I-O pointsdepends on the structure
Data transfer mediumscreened, twisted copper cable, 2 x signal, 1 x ground (recommended)
Max. cable length
5,000 m2,500 m1,000 m500 m250 m100 m40 m
Data transfer rates
10 kbaud20 kbaud50 kbaud100-125 kbaud250 kbaud500 kbaud1,000 kbaud
PDO modessynchron, cyclic, event driven, polling
Technical dataBK5120
Number of Bus Terminals64 (255 with K-bus extension)
Max. number of bytes fieldbus16 Tx-Rx PDOs
Digital peripheral signals960 inputs-outputs
Analog peripheral signals60 inputs-outputs
Configuration possibilityvia KS2000 or the controller
Number of PDOs (CANopen)16 Tx16 Rx
Additional CANopen featureslife, node guarding, emergency object, variable mapping, store-restore
Data transfer ratesup to 1 Mbaud
Bus interface1 x open style connector, 5-pin, included
Power supply24 V DC (-15 %+20 %)
Input current70 mA + (total K-bus current)4, 500 mA max.
Starting currentapprox. 2.5 x continuous current
Recommended fuse≤ 10 A
Current supply K-bus1750 mA
Power contacts24 V DC max.10 A max.
Electrical isolation500 V (power contact-supply voltage Bus Coupler)
Weightapprox. 150 g
Operating-storage temperature-25…+60 °C-40…+85 °C
Relative humidity95 %, no condensation
Vibration-shock resistanceconforms to EN 60068-2-6EN 60068-2-27
EMC immunity-emissionconforms to EN 61000-6-2EN 61000-6-4
Protect. class-installation pos.IP 20variable
ApprovalsCE, UL, Ex, GL
Accessories 
KS2000configuration software for extended parameterisation
Cordsetscordsets and connectors
FC5101 | FC5102CANopen PCI fieldbus cards
Related products 
BK5110CANopen Coupler for up to 64 digital Bus Terminals
BK5150CANopen “Compact” Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension)
BK5151CANopen “Compact” Bus Coupler for up to 64 Bus Terminals (255 with K-bus extension)
LC5100CANopen “Low Cost“ Bus Coupler version for up to 64 digital Bus Terminals (255 with K-bus extension)
BC5150CANopen “Compact” Bus Terminal Controller for up to 64 Bus Terminals (255 with K-bus extension)
BX5100CANopen Bus Terminal Controller for up to 64 Bus Terminals (255 with K-bus extension)
CX8051CANopen Embedded PC, slave
System 
CANopenFor further CANopen products please see the system overview

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