Product details
Product Overview
- BK9050 – Ethernet TCP/IP Bus Coupler (compact housing)
- Connects Ethernet with modular terminal blocks
- One unit = coupler + up to 64 terminals (255 with K-bus extension)
- Auto-detects connected terminals and assigns I/O to process image
- Supports 10/100 Mbit/s Ethernet via RJ45
- IP address set via DIP switch or DHCP server
Key Features
- Supports TwinCAT ADS, Modbus TCP, and Beckhoff real-time Ethernet
- Up to 512 bytes input and 512 bytes output
- Handles 1,020 digital or 128 analog signals
- Auto-negotiation of 10/100 Mbaud data rate
- Star wiring topology – easy network setup
- Compact, lightweight (approx. 100 g)
Technical Specifications
- Brand: Beckhoff
- Model: BK9050
- Series: BK9000 Ethernet coupler series
- Type: Compact Bus Coupler
- Number of Bus Terminals: 64 (255 with K-bus extension)
- Max. fieldbus bytes: 512 input / 512 output
- Digital signals: up to 1,020 I/O points
- Analog signals: up to 128 I/O points
- Protocols: TwinCAT ADS, Modbus TCP, Beckhoff real-time Ethernet
- Configuration: via KS2000 software
- Data transfer rate: 10/100 Mbaud (auto-recognition)
- Bus interface: 1 x RJ45
- Power supply: 24 V DC (-15 % / +20 %)
- Input current: max. 320 mA
- Starting current: 2.5 x continuous current
- Recommended fuse: ≤ 10 A
- K-bus supply: 1750 mA
- Power contacts: max. 24 V DC / 10 A
- Isolation: 500 V (power contact / supply / fieldbus)
- Weight: approx. 100 g
- Operating temperature: 0 … +55 °C
- Storage temperature: -25 … +85 °C
- Humidity: 95 % (no condensation)
- Vibration / shock: EN 60068-2-6 / EN 60068-2-27
- EMC immunity / emission: EN 61000-6-2 / EN 61000-6-4
- Protection class: IP20
- Installation position: variable
- Approvals: CE, UL, Ex, GL
Installation & Network Setup
- Mount on 35 mm DIN rail (EN 60715)
- Connect via standard RJ45 Ethernet cable
- Set IP address using DIP switches or DHCP server
- Use KS2000 software for extended parameterisation
- Star topology with hub/switch – 100 m distance between devices
- Cable: 4 x 2 twisted pair, Cat.3 (10 Mbaud) or Cat.5 (100 Mbaud)
Compatibility
- Works with all Beckhoff Bus Terminals (KL series)
- Supports TwinCAT I/O, Windows NT/2000/XP drivers, DLLs, ActiveX
- OPC server access via ADS interface
- Modbus TCP for third-party master/slave communication
- Compatible with BK9000, BK9100, BC9000, BC9050, CX8090
Certifications
- CE – EU conformity
- UL – US/Canada recognized
- Ex – explosion protection (hazardous areas)
- GL – Germanischer Lloyd (marine applications)
Package Contents
- 1 x BK9050 Bus Coupler
- 1 x end terminal (included)
- No additional accessories required (KS2000 sold separately)
Warranty & Shipping
- 12-month warranty against defects
- Ships within 12–24 hours after order
- Carriers: FedEx, UPS, DHL – tracking number provided
Expert Review
- “The BK9050 is a reliable gateway for EtherNet/IP systems. Its auto-addressing and dual protocol support (ADS/Modbus) make it a flexible choice. I recommend it for mixed automation networks.” – Senior Controls Engineer
Manager’s Insight
- “This coupler reduces engineering effort – no manual I/O mapping. The K-bus extension allows up to 255 terminals, scaling with your plant. Cost-effective and field-proven.” – Product Manager
Applications & Compatible Devices
- Typical use: factory automation, machine control, process monitoring
- Compatible with: PLC systems, SCADA, HMIs, and industrial PCs
- Works with: Beckhoff KL series terminals, TwinCAT software
- Perfect for: distributed I/O, retrofits, and new installations
Frequently Asked Questions (FAQ)
- Can I use BK9050 without TwinCAT?
Yes. It supports Modbus TCP, so any Modbus master can communicate with it. - How many terminals can I connect?
Up to 64 directly, or 255 with the K-bus extension cable. - Does it support DHCP?
Yes. It can obtain an IP address from a DHCP server automatically. - What is the maximum cable length?
100 m between the coupler and the switch/hub using Cat.5 cable. - Is the configuration saved after power-off?
Yes. All settings are stored in non-volatile memory.
Experience-Based Q&A
- We had connection issues with other couplers – will this help?
Yes. The auto-negotiation feature adapts to 10/100 Mbit networks, reducing handshake errors. - How do I set the IP address without DHCP?
Use the DIP switches on the front panel to set an offset from a start address. - Can I mix digital and analog terminals?
Absolutely. The coupler handles both types seamlessly.
Selection Guide
- Choose BK9050 for compact size, Modbus TCP, and K-bus extension.
- For integrated 2-port switch, select BK9100.
- For controller + coupler combined, see BC9000 or CX8090.
- If you don’t need K-bus extension, the BK9000 is a cost-saving option.
Contact Information:
Email: sales@powergearx.com
WhatsApp: +86 18030005825
Compare with similar models:
- BK9000 – Standard Ethernet coupler (no K-bus extension)
- BK9100 – Same as BK9050 but with 2-port switch
- BC9000 – Bus Terminal Controller (PLC + coupler)
- CX8090 – Embedded PC with Ethernet coupler
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