BK9100 Beckhoff
Wake Industrial LLC is not an authorized distributor of this product.
The Beckhoff BK9100 is part of the BK EtherCAT Bus Couplers series and features 512 digital and 128 analog peripheral input/output signals. It offers 2 RJ45 bus connections, supports a data transfer rate up to 100 Mbaud, and accommodates up to 64 bus terminals. The coupler operates at 24 VDC supply voltage with a maximum power contact current of 10 Amps.
Internal Product Review
The BK9100 is a Beckhoff EtherCAT bus coupler with 2 x RJ45 bus connections and 10/100 Mbaud data transfer for dependable network integration. Support for 64 bus terminals and 512 B in / 512 B out process data gives the unit strong flexibility in distributed I/O architectures. A 2 km cascade length makes the BK9100 an excellent fit for larger EtherCAT installations.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The BK9100 is an EtherCAT bus coupler produced by Beckhoff for the BK EtherCAT Bus Couplers series. Acting as the interface between the high-speed EtherCAT backbone and a station of modular I/O terminals, the unit gathers field signals and packs them into the real-time frame transmitted to a PLC or IPC. Within an automation cabinet, it mounts next to standard Beckhoff K-bus terminals so that discrete sensors, actuators, and analog transducers become accessible on the network with deterministic timing.
EtherCAT wiring enters the coupler through two RJ45 ports that support line or ring topologies. Each port communicates at 10/100 Mbaud, allowing the device to forward telegrams without additional switches. The internal logic and power contacts are fed from a 24 VDC supply, so the coupler can share the same low-voltage rail that powers downstream terminals. During each cycle, it exchanges up to 512 B of input data and 512 B of output data with the controller. This capacity supports a station maximum of 512 digital inputs and outputs, allowing bit-accurate images of connected points to be transferred in a single frame.
In mixed installations, the station may also contain 128 analog inputs and outputs, and the BK9100 refreshes these channels while providing a continuous 1750 mA K-bus supply to the terminal stack. Electrical isolation between the field and logic domains is maintained by a 500 V dielectric barrier inside the coupler. When larger sections must be bridged, up to twenty BK9100 nodes can be cascaded. A segment length of 2 km can be reached by inserting fiber or copper repeaters at standard intervals, while individual node groups remain limited to 100 m between units. These limits help preserve signal integrity and keep power conductors within the stated 10 A rating for the contact strip.
