When Sensor-Level Logic Helps—and When It Hides Risk
Configurable sensors can perform window, latch, delay, and Boolean decisions before data reaches a PLC. The benefit is faster local behavior; the risk is hidden logic, weak diagnostics, and...
The BECKHOFF BC9050 is an Ethernet TCP/IP Bus Terminal Controller designed to connect standard Ethernet networks directly to the BECKHOFF Bus Terminal system. Acting as a programmable control unit, it combines a decentralized fieldbus controller with the modular flexibility of modular I/O terminals, supporting up to 64 Bus Terminals directly or up to 255 terminals with K-bus extension.
Equipped with an RJ45 interface operating at 10 or 100 Mbit/s with automatic transmission rate recognition, the BC9050 processes control logic locally using an integrated PLC runtime system programmable via TwinCAT in accordance with IEC 61131-3. Communication is supported via protocols including TwinCAT ADS and Modbus TCP, allowing seamless integration into automation networks for data exchange, monitoring, and decentralized control tasks.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Exact Model | BC9050 |
| Product Type | Ethernet TCP/IP Bus Terminal Controller |
| Design Form | Compact terminal housing with signal LEDs |
| Material | Polycarbonate |
| Dimensions (W x H x D) | 44 mm x 100 mm x 68 mm |
| Net Weight | Approx. 100 g |
| Mounting | On 35 mm DIN rail, conforming to EN 60715 with lock |
| Country of Origin | Germany |
| Parameter | Specification |
|---|---|
| Power Supply | 24 V DC (-15 %/+20 %) |
| Input Current | 70 mA + (total K-bus current)/4, 500 mA max. |
| Starting Current | Approx. 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) |
| Parameter | Specification |
|---|---|
| Programming | Via TwinCAT and programming interface or Ethernet |
| Program Memory | 48 kbytes |
| Data Memory | 32 kbytes |
| Remanent Data | 2 bytes |
| Runtime System | 1 PLC task |
| PLC Cycle Time | Approx. 1.5 ms for 1,000 instructions (without I/O cycle, K-bus) |
| Programming Languages | IEC 61131-3 (IL, LD, FBD, SFC, ST) |
| Online Change | Yes |
| Parameter | Specification |
|---|---|
| Bus Interface | 1 x RJ45 |
| Data Transfer Rates | 10/100 Mbit/s, automatic recognition |
| Protocols | TwinCAT ADS, Modbus TCP |
| Number of Bus Terminals | 64 (255 with K-bus extension) |
| Max. Fieldbus Bytes | 512 byte input and 512 byte output |
| Max. Process Image Bytes | 2048 byte input and 2048 byte output |
| Digital Peripheral Signals | 2,040 inputs/outputs |
| Analog Peripheral Signals | 512 inputs/outputs |
| Parameter | Specification |
|---|---|
| Connection Cross-Section Solid | 0.08 – 2.5 mm² |
| Connection Cross-Section Stranded | 0.08 – 2.5 mm² |
| Connection Cross-Section Ferrule | 0.14 – 1.5 mm² |
| Stripping Length | 8 – 9 mm |
| Operating Temperature | 0 to +55 degC |
| Storage Temperature | -25 to +85 degC |
| Protection Rating | IP20 |
| Approvals / Markings | CE, UL, ATEX |
| Ex Marking | II 3 G Ex nA IIC T4 Gc |
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Returns & Warranty

The BECKHOFF BC9050 is an Ethernet TCP/IP Bus Terminal Controller designed to connect standard Ethernet networks directly to the BECKHOFF Bus Terminal system. Acting as a programmable control unit, it combines a decentralized fieldbus controller with the modular flexibility of modular I/O terminals, supporting up to 64 Bus Terminals directly or up to 255 terminals with K-bus extension.
Equipped with an RJ45 interface operating at 10 or 100 Mbit/s with automatic transmission rate recognition, the BC9050 processes control logic locally using an integrated PLC runtime system programmable via TwinCAT in accordance with IEC 61131-3. Communication is supported via protocols including TwinCAT ADS and Modbus TCP, allowing seamless integration into automation networks for data exchange, monitoring, and decentralized control tasks.
| Parameter | Specification |
|---|---|
| Manufacturer | BECKHOFF |
| Exact Model | BC9050 |
| Product Type | Ethernet TCP/IP Bus Terminal Controller |
| Design Form | Compact terminal housing with signal LEDs |
| Material | Polycarbonate |
| Dimensions (W x H x D) | 44 mm x 100 mm x 68 mm |
| Net Weight | Approx. 100 g |
| Mounting | On 35 mm DIN rail, conforming to EN 60715 with lock |
| Country of Origin | Germany |
| Parameter | Specification |
|---|---|
| Power Supply | 24 V DC (-15 %/+20 %) |
| Input Current | 70 mA + (total K-bus current)/4, 500 mA max. |
| Starting Current | Approx. 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) |
| Parameter | Specification |
|---|---|
| Programming | Via TwinCAT and programming interface or Ethernet |
| Program Memory | 48 kbytes |
| Data Memory | 32 kbytes |
| Remanent Data | 2 bytes |
| Runtime System | 1 PLC task |
| PLC Cycle Time | Approx. 1.5 ms for 1,000 instructions (without I/O cycle, K-bus) |
| Programming Languages | IEC 61131-3 (IL, LD, FBD, SFC, ST) |
| Online Change | Yes |
| Parameter | Specification |
|---|---|
| Bus Interface | 1 x RJ45 |
| Data Transfer Rates | 10/100 Mbit/s, automatic recognition |
| Protocols | TwinCAT ADS, Modbus TCP |
| Number of Bus Terminals | 64 (255 with K-bus extension) |
| Max. Fieldbus Bytes | 512 byte input and 512 byte output |
| Max. Process Image Bytes | 2048 byte input and 2048 byte output |
| Digital Peripheral Signals | 2,040 inputs/outputs |
| Analog Peripheral Signals | 512 inputs/outputs |
| Parameter | Specification |
|---|---|
| Connection Cross-Section Solid | 0.08 – 2.5 mm² |
| Connection Cross-Section Stranded | 0.08 – 2.5 mm² |
| Connection Cross-Section Ferrule | 0.14 – 1.5 mm² |
| Stripping Length | 8 – 9 mm |
| Operating Temperature | 0 to +55 degC |
| Storage Temperature | -25 to +85 degC |
| Protection Rating | IP20 |
| Approvals / Markings | CE, UL, ATEX |
| Ex Marking | II 3 G Ex nA IIC T4 Gc |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
Germany
|