Beckhoff BK3150 – Overview The Beckhoff BK3150 is a compact bus coupler designed for the PROFIBUS fieldbus system, integrating with the Beckhoff Bus Terminal architecture. It supports connection of up to 64 Bus Terminals (up to 255 with K-bus extension) and provides automatic baud rate detection up to 12 Mbaud. Optimised for dense installations and industrial automation environments. Key Features Supports connection of up to 64 Bus Terminals (255 with K-bus extension) Max. fieldbus data: 128 bytes input + 128 bytes output Automatic baud rate detection up to 12 Mbaud Standard D-sub 9-pin interface for PROFIBUS connection Compact housing for efficient installation in control cabinets Power supply 24 V DC, K-bus current supply up to 1750 mA Electrical isolation of 500 V between power contact / supply / fieldbus Robust industrial design, mounting on 35 mm DIN-rail Technical Specifications Part Number: BK3150 Number of Bus Terminals: 64 (255 when K-bus extension used) Max. Data Bytes (Fieldbus): 128 bytes input, 128 bytes output Bus Interface: 1 × D-sub 9-pin Data Transfer Rate: Automatic detection, up to 12 Mbaud Power Supply: 24 V DC (-15 % / +20 %) Input Current: 70 mA + (total K-bus current)/4, max 500 mA Current Supply for K-bus: 1750 mA Power Contacts: max. 24 V DC / max. 10 A Electrical Isolation: 500 V (power contact / supply voltage / fieldbus) Dimensions (W × H × D): 44 mm × 100 mm × 68 mm Weight: Approx. 100 g Operating Temperature: -25 °C … +60 °C Storage Temperature: -40 °C … +85 °C Protection Rating: IP20 Approvals / Markings: CE, CCC, UL, ATEX, IECEx Manufacturer: Beckhoff Automation Packed weight/dimensions: 0.10 – 0.23 kg (0.22 – 0.50 lb) | 12 × 7 × 6 cm (4.7 × 2.8 × 2.4 in) Applications Integration of Beckhoff Bus Terminals into PROFIBUS networks Compact machine control cabinets where space is limited Distributed I/O architectures requiring fieldbus connectivity Industrial automation systems using PROFIBUS DP for device communication Why Choose Beckhoff BK3150 High flexibility in connecting up to 255 Bus Terminals via K-bus extension Wide fieldbus data bandwidth (128 bytes in/out) for comprehensive I/O usage Proven industrial design with extensive approvals and wide temperature range Efficient integration into compact control panels thanks to slim housing Beckhoff’s longstanding reliability in automation environments Order Now The Beckhoff BK3150 PROFIBUS Compact Bus Coupler is available for order and ships worldwide.
