Many procurement teams check BK3100 against Beckhoff Bk5200, Beckhoff Bk9105 and Beckhoff Bk9050 before signing purchase orders, verifying quality, compliance, and after-sales support availability.
BK3100 - Beckhoff EtherCAT Bus Couplers
Beckhoff BK3100 EtherCAT Bus Couplers enable reliable fieldbus-to-terminal communication, built for scalable automation in modern industrial systems.
| Brand | Beckhoff |
| Product Type | EtherCAT Bus Couplers |
| Product | BK3100 |
BK3100 Beckhoff EtherCAT Bus Couplers Technical Specifications
| Specification | Value |
|---|---|
| Number of Bus Terminals | 64 |
| Max. number of bytes fieldbus | 64Â byte input and 64Â byte output (DP and FMS mode), 128Â byte input and 128Â byte output (only DP mode) |
| Configuration possibility | via KS2000 or the controller |
| Data transfer rates | automatic detection up to 12 Mbaud |
| Bus interface | 1 x D-sub 9-pin socket with shielding |
| Data transfer medium | shielded copper cable, 2 x 0.25 mm² |
| 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) |
| Weight | approx. 170 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) | 51 mm x 100 mm x 69 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 | 512 inputs/outputs |
| Analog peripheral signals | 64 inputs/outputs (only DP mode) |
The Beckhoff BK3100 Bus Coupler is engineered for stable data communication with automatic detection up to 12 Mbaud. It supports up to 64 Bus Terminals, expandable to 255 with K-bus extension. The coupler handles 128 byte input and output in DP mode and 64 byte input and output in DP/FMS mode, ensuring flexibility for diverse systems. Powered by 24 V DC with a maximum input current of 500 mA, it delivers 1750 mA K-bus current to manage extensive I/O requirements. Built-in 500 V isolation safeguards connections, while the D-sub 9-pin socket ensures secure bus interface connectivity with shielded copper cables.
The BK3100 Bus Coupler features a compact polycarbonate housing (51 x 100 x 69 mm) with signal LEDs for diagnostics, designed for easy installation on 35 mm DIN rails. It withstands harsh conditions with IP20 protection, vibration resistance per EN 60068, and compliance with EN 61000 EMC standards. Approved with CE, UL, ATEX, IECEx, and DNV GL certifications, it delivers consistent performance across temperatures from 0°C to +55°C in global applications.
Applications of the Beckhoff BK3100 Bus Coupler span factory automation, robotics, packaging systems, building automation, and process industries. Junior engineers benefit from simple configuration via KS2000 or controller-based setup, while experienced professionals value its flexible data handling and reliability under demanding workloads. Maintenance teams appreciate its rugged build and clear LED indicators that minimize downtime. For engineers seeking a proven and scalable EtherCAT Bus Coupler, the Beckhoff BK3100 offers trusted performance and long-term reliability. Request a call back today to discuss integration for your automation needs.
