Description
The Beckhoff BK9055 EtherNet/IP™ Bus Coupler connects EtherNet/IP networks to Beckhoff modular Bus Terminals, supporting up to 64 terminals or 255 with K-bus extension. It automatically maps connected I/O channels to the process image and operates at 10/100 Mbit/s for efficient and reliable data exchange in industrial Ethernet environments.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Beckhoff |
| Category |
Industrial Communication |
| Part Number |
BK9055 |
| Subcategory |
Bus Couplers |
| Protocol |
EtherNet/IP™ |
| Bus Interface |
1 x RJ45 |
| Data Transfer Rate |
10/100 Mbit/s (auto-negotiation) |
| Data Transfer Medium |
Twisted pair copper cable (Cat.3 for 10 Mbit/s, Cat.5 for 100 Mbit/s) |
| Number of Bus Terminals |
Up to 64 (255 with K-bus extension) |
| Max. Bytes Fieldbus |
492 bytes input, 492 bytes output |
| Digital Peripheral Signals |
3,936 inputs/outputs |
| Analog Peripheral Signals |
122 inputs/outputs |
| Configuration |
Via KS2000 configuration software |
| Topology |
Star wiring |
| Distance Between Stations |
Max. 100 m between hub/switch and coupler |
| Power Supply |
24 V DC (-15% / +20%) |
| Input Current |
70 mA + (total K-bus current)/4, 500 mA max. |
| Starting Current |
2.5 × continuous current |
| Recommended Fuse |
≤ 10 A |
| K-bus Current Supply |
1,750 mA |
| Power Contacts |
Max. 24 V DC / 10 A |
| Electrical Isolation |
500 V (power/supply/fieldbus) |
| Data Configuration |
Automatic I/O mapping |
| IP Address Assignment |
Via DIP switch or DHCP server |
| Operating Temperature |
0…55°C |
| Storage Temperature |
-25…+85°C |
| Relative Humidity |
95%, non-condensing |
| Mounting |
DIN rail |
| Enclosure Protection |
IP20 |
| Weight |
100 g (approx. 0.22 lbs) |
Information About BK9055
The BK9055 is part of Beckhoff’s Economy Bus Coupler series, designed to integrate modular I/O terminals into EtherNet/IP™ industrial networks. It acts as the communication interface between EtherNet/IP controllers and Beckhoff’s I/O system, automatically detecting and configuring up to 64 connected terminals. The coupler supports both 10 Mbit/s and 100 Mbit/s Ethernet speeds through standard RJ45 connections and can operate in networks using star topologies. IP addressing can be set manually using DIP switches or dynamically via a DHCP server. Its high I/O density and flexible configuration make the BK9055 ideal for distributed automation tasks, providing reliable communication across industrial control systems.
Key Features:
- EtherNet/IP Integration: Connects Beckhoff Bus Terminals directly to EtherNet/IP networks using standard Ethernet infrastructure.
- Automatic I/O Configuration: Detects and maps connected terminals automatically to simplify setup and commissioning.
- Flexible Network Setup: Supports both 10 and 100 Mbit/s Ethernet data rates with automatic speed recognition.
- High I/O Capacity: Manages up to 64 terminals or 255 with K-bus extension, offering 3,936 digital and 122 analog I/O channels.
- Robust Electrical Design: Features 500 V isolation between power, fieldbus, and signal levels for improved safety.
- Versatile Addressing: IP address assignment via DIP switches or DHCP for easy network integration.
- Stable Power Supply: Operates at 24 V DC with 1,750 mA K-bus current capacity for multiple I/O modules.
- Industrial Durability: IP20-rated housing with operating temperature from 0 to 55°C for control cabinet environments.
The BK9055 delivers the reliability and precision required for high-performance industrial Ethernet communication and distributed control applications.
