In most procurement cycles, BK9050 is considered with Beckhoff Bk5200, Beckhoff Bk9000 and Beckhoff Bk9105, giving decision-makers confidence that they’ve chosen the most dependable component.
BK9050 - Beckhoff EtherCAT Bus Couplers
Beckhoff Bus Coupler BK9050 integrates fieldbus systems with Bus Terminals, providing fast and reliable data communication for scalable industrial automation.
| Brand | Beckhoff |
| Product Type | EtherCAT Bus Couplers |
| Product | BK9050 |
BK9050 Beckhoff EtherCAT Bus Couplers Technical Specifications
| Specification | Value |
|---|---|
| Number of Bus Terminals | 64 (255 with K-bus extension) |
| Max. number of bytes fieldbus | 512 byte input and 512 byte output |
| Configuration possibility | via KS2000 |
| Data transfer rates | 10/100 Mbit/s, automatic recognition of the transmission rate |
| Bus interface | 1 x RJ45 |
| Data transfer medium | 4 x 2 twisted pair copper cable; category 3 (10 Mbit/s), category 5 (100 Mbit/s) |
| Power supply | 24 V DC (-15%/+20%) |
| Input current | 70 mA + (total K-bus current)/4, 500Â mA max. |
| Starting current | 2.5 x continuous current |
| Recommended fuse | ≤ 10 A |
| Current supply K-bus | 1750 mA |
| Power contacts | max. 24 V DC/max. 10 A |
| Electrical isolation | 500 V (power contact/supply voltage/fieldbus) |
| Distance between stations | 100 m between hub/switch and bus coupler |
| Weight | approx. 100 g |
| Operating temperature | 0...55°C |
| Storage temperature | -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. rating/installation pos. | IP20/variable |
| Approvals/markings | CE, CCC, UL, ATEX, IECEx, DNV GL |
| Ex marking | ATEX: II 3 G Ex ec IIC T4 GcIECEx: Ex ec IIC T4 Gc |
| Housing - Design form | compact terminal housing with signal LEDs |
| Housing - Material | polycarbonate |
| Housing - Dimensions (W x H x D) | 44 mm x 100 mm x 68 mm |
| Housing - Installation | on 35 mm DIN rail, conforming to EN 60715 with lock |
| Housing - Side by side mounting by means of | double slot and key connection |
| Housing - Marking | labeling of the BZxxxx series |
| Housing - Wiring | solid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver |
| Housing - Connection cross-section | s*: 0.08...2.5 mm²,st*: 0.08...2.5 mm²,f*: 0.14...1.5 mm² |
| Housing - Stripping length | 8...9 mm |
| Housing - Current load power contacts | Imax: 10 A |
| Digital peripheral signals | 1,020 inputs/outputs |
| Analog peripheral signals | 128 inputs/outputs |
| Protocol | TwinCAT ADS, Modbus TCP, Beckhoff real-time Ethernet |
| Topology | star wiring |
The Beckhoff BK9050 Bus Coupler is designed for seamless communication in distributed automation, offering EtherCAT connectivity with support for up to 64 Bus Terminals, expandable to 255 with K-bus extension. It provides 512 input and 512 output bytes with data transfer rates of 10/100 Mbit/s, automatically adapting to the connected system. The unit features an RJ45 bus interface and supports TwinCAT ADS, Modbus TCP, and Beckhoff real-time Ethernet protocols, making it versatile for multiple automation environments. With a 24 V DC supply, maximum input current of 500 mA, and 500 V electrical isolation, it ensures safety and stable operation across industrial plants.
The BK9050 offers a 1750 mA K-bus current supply, managing 1,020 digital signals and 128 analog signals efficiently. Compact and lightweight at only 100 g, it features a 44 x 100 x 68 mm polycarbonate housing with diagnostic LEDs for quick monitoring. Easy to mount on 35 mm DIN rails, it withstands vibration and shock per EN 60068 and conforms to EN 61000 EMC standards. With global approvals including CE, UL, ATEX, and IECEx, and an operating range of 0°C to +55°C, the BK9050 is engineered for long-term reliability in demanding conditions.
The BK9050 Bus Coupler is widely applied in process automation, packaging systems, robotics, building automation, and industrial machinery. Junior engineers benefit from its simple configuration via KS2000 software, while experienced professionals appreciate its high-speed communication and compatibility with multiple protocols. Maintenance teams value its rugged build, clear status indicators, and reduced downtime. For engineers seeking a robust, scalable, and efficient EtherCAT Bus Coupler, the Beckhoff BK9050 is a trusted choice. Request a call back today to receive expert support for your automation projects.
