Details

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The Beckhoff BK3120 PROFIBUS Economy Plus Bus Coupler is a compact and versatile I/O interface designed to integrate Beckhoff Bus Terminals with PROFIBUS DP networks. It is ideal for applications requiring scalable, distributed I/O solutions with robust fieldbus communication.

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🔧 Product Overview

• Bus Terminal Support: Connects up to 64 Bus Terminals directly; expandable to 255 using Beckhoff's K-bus extension technology. 

• Data Throughput: Supports up to 128 bytes of input and 128 bytes of output data in PROFIBUS DP mode, omitting FMS operation to maximize user data transfer. 

• PROFIBUS DP V1 Services: Enables direct access to Bus Coupler registers and complex Bus Terminals, allowing for parameterization adjustments and limit value settings for analog terminals. 

• Automatic Baud Rate Detection: Supports baud rates up to 12 Mbaud, automatically adapting to the network's requirements.

• Power Supply: Operates on a 24 V DC supply with a maximum input current of 500 mA. 

• Environmental Compliance: Conforms to EN 60068-2-6 and EN 60068-2-27 standards for vibration and shock resistance. 

• Approvals: CE, UL, ATEX, IECEx, DNV GL, cFMus certified.
  
   

  Feature	Specification
  Bus Terminal Capacity	Up to 64 (255 with K-bus extension)
  Fieldbus Data	128 bytes input / 128 bytes output
  Baud Rate	Up to 12 Mbaud (auto-detected)
  Bus Interface	D-sub 9-pin socket
  Power Supply	24 V DC (-15%/+20%)
  Input Current	70 mA + (total K-bus current)/4, max 500 mA
  K-bus Current Supply	1750 mA
  Power Contacts	Max. 24 V DC / 10 A
  Isolation	500 V (power/contact/supply/fieldbus)
  Operating Temperature	-25°C to +60°C
  Storage Temperature	-40°C to +85°C
  Humidity	95% RH, non-condensing
  Dimensions (WxHxD)	51 mm x 100 mm x 69 mm
  Mounting	35 mm DIN rail
  Protection Rating	IP20