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Beckhoff BK3120 – Overview
The Beckhoff BK3120 is a bus coupler designed for PROFIBUS DP networks in automation systems. As part of the “Economy Plus” series, it supports up to 64 Bus Terminals (or up to 255 with K-Bus extension) and features automatic detection of baud rates up to 12 Mbaud. Ideal for connecting modular I/O terminals in distributed control environments.
Key Features
-
Supports PROFIBUS DP with automatic baud rate detection up to 12 Mbaud
-
Supports up to 64 Bus Terminals (expandable to 255 with K-Bus extension)
-
Data exchange capacity: 128 bytes input + 128 bytes output
-
24 V DC supply for system and terminals
-
Power contacts forwarding up to 10 A for field devices
-
Electrical isolation for safe fieldbus interface
-
DIN-rail mountable and compact housing
Technical Specifications
-
Part Numbers:
– BK3120
– BK 3120 -
Network Protocol: PROFIBUS DP (supports DPV1 services)
-
Maximum Number of Bus Terminals: 64 (255 with extension)
-
Data Transfer Capacity: 128 bytes input + 128 bytes output
-
Baud Rate: Up to 12 Mbaud, automatically detected
-
Power Supply: 24 V DC (-15% / +20%)
-
Input Current: 70 mA + (total K-Bus current)/4, max 500 mA
-
Power Contacts Load: Up to 24 V DC / 10 A
-
Electrical Isolation: 500 V between power contact / supply voltage / fieldbus
-
Operating Temperature: -25 °C … +60 °C
-
Storage Temperature: -40 °C … +85 °C
-
Mounting: 35 mm DIN-rail
-
Protection Rating: IP20
-
Manufacturer: Beckhoff Automation
-
Weight: approx. 170 g
-
Dimensions (W × H × D): 51 × 100 × 69 mm
Applications
-
Modular I/O installations in industrial automation via PROFIBUS DP
-
Control panels and machine automation requiring distributed terminals
-
Systems where scalability and fieldbus performance are key
-
Integration of Beckhoff Bus Terminals in PROFIBUS networks
Why Choose Beckhoff BK3120
-
High scalability with support for up to 255 terminals
-
Automatic baud rate detection enhances flexibility during installation
-
Industry-standard PROFIBUS DP interface with robust electrical isolation
-
Compact, reliable coupler for distributed automation systems
Order Now
The Beckhoff BK3120 PROFIBUS Economy Plus Bus Coupler is available for order and ships worldwide.
Description
Beckhoff BK3120 – Overview
The Beckhoff BK3120 is a bus coupler designed for PROFIBUS DP networks in automation systems. As part of the “Economy Plus” series, it supports up to 64 Bus Terminals (or up to 255 with K-Bus extension) and features automatic detection of baud rates up to 12 Mbaud. Ideal for connecting modular I/O terminals in distributed control environments.
Key Features
-
Supports PROFIBUS DP with automatic baud rate detection up to 12 Mbaud
-
Supports up to 64 Bus Terminals (expandable to 255 with K-Bus extension)
-
Data exchange capacity: 128 bytes input + 128 bytes output
-
24 V DC supply for system and terminals
-
Power contacts forwarding up to 10 A for field devices
-
Electrical isolation for safe fieldbus interface
-
DIN-rail mountable and compact housing
Technical Specifications
-
Part Numbers:
– BK3120
– BK 3120 -
Network Protocol: PROFIBUS DP (supports DPV1 services)
-
Maximum Number of Bus Terminals: 64 (255 with extension)
-
Data Transfer Capacity: 128 bytes input + 128 bytes output
-
Baud Rate: Up to 12 Mbaud, automatically detected
-
Power Supply: 24 V DC (-15% / +20%)
-
Input Current: 70 mA + (total K-Bus current)/4, max 500 mA
-
Power Contacts Load: Up to 24 V DC / 10 A
-
Electrical Isolation: 500 V between power contact / supply voltage / fieldbus
-
Operating Temperature: -25 °C … +60 °C
-
Storage Temperature: -40 °C … +85 °C
-
Mounting: 35 mm DIN-rail
-
Protection Rating: IP20
-
Manufacturer: Beckhoff Automation
-
Weight: approx. 170 g
-
Dimensions (W × H × D): 51 × 100 × 69 mm
Applications
-
Modular I/O installations in industrial automation via PROFIBUS DP
-
Control panels and machine automation requiring distributed terminals
-
Systems where scalability and fieldbus performance are key
-
Integration of Beckhoff Bus Terminals in PROFIBUS networks
Why Choose Beckhoff BK3120
-
High scalability with support for up to 255 terminals
-
Automatic baud rate detection enhances flexibility during installation
-
Industry-standard PROFIBUS DP interface with robust electrical isolation
-
Compact, reliable coupler for distributed automation systems
Order Now
The Beckhoff BK3120 PROFIBUS Economy Plus Bus Coupler is available for order and ships worldwide.