BECKHOFF

Beckhoff BC3150 PROFIBUS Bus Terminal Controller

SKU BC3150

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: BECKHOFF

  • Product No.: BC3150

  • Country of origin:Germany

  • Product Type: PROFIBUS Controllers

  • Payment: T/T, Western Union

  • Weight: 3000g

  • Dimensions: 44 mm x 100 mm x 68 mm

  • Shipping port: Xiamen

  • Warranty: 12 months

Description

Executing local control logic at the field level, the Beckhoff BC3150 functions as a high-efficiency PROFIBUS Bus Terminal Controller. This compact PLC device manages up to 64 decentralized Bus Terminals (expanding to 255 with a K-bus extension) and interfaces seamlessly with primary PROFIBUS DP master controllers. Engineered with integrated memory and an execution environment programmed via TwinCAT, it serves as a robust processing node for distributed industrial automation architectures.

Features

  • Embedded PLC Functionality: Programmed using TwinCAT in standard IEC 61131-3 languages (IL, LD, FBD, SFC, ST).
  • High-Speed Communication: Automatic baud rate detection up to 12 Mbaud on the PROFIBUS DP interface.
  • Scalable I/O Capacity: Direct connection of up to 64 Bus Terminals, handling up to 2,040 digital or 128 analog peripheral points.
  • Optimized Memory Footprint: Equips 48 kbytes of program memory, 32 kbytes of data memory, and 2 bytes of non-volatile (remanent) data storage.
  • Modular Expansion: K-bus system connection delivers up to 1750 mA current supply to downstream input and output terminals.

Applications

  • Decentralized process control and subsystem preprocessing.
  • Machine-level PLC execution with dedicated fieldbus handshaking.
  • Distributed packaging, logistics, and material handling systems requiring autonomous local safety logic.

Technical Specifications

Specification Parameter Value / Detail
Manufacturer Beckhoff Automation
Model / Part Number BC3150
Fieldbus Interface 1 x D-sub socket, 9-pin (PROFIBUS DP)
Programming System TwinCAT (via programming interface or fieldbus)
Program Memory 48 kbytes
Data Memory 32 kbytes
Remanent Data 2 bytes
PLC Cycle Time Approx. 3 ms for 1,000 instructions
Max. Fieldbus Data Size 128 bytes input / 128 bytes output
Power Supply Input 24 V DC (-15% / +20%)
Input Current 320 mA maximum
Current Supply K-Bus 1750 mA
Power Contacts Max. 24 V DC / Max. 10 A
Electrical Isolation 500 V (power contact / supply voltage)
Operating Temperature -25 to +60 degC
Storage Temperature -40 to +85 degC
Ex Marking II 3 G Ex nA IIC T4 Gc
Product Dimensions 44 mm x 100 mm x 68 mm (W x H x D)
Shipping Weight (Calculated) 3.0 kg

Connections and Interfaces

D-sub 9-Pin Assignment Signal Name Functional Description
Pin 3 RxD/TxD-P Receive/Transmit Data Positive (B-line)
Pin 5 DGND Data Ground references for termination
Pin 6 VP Supply Voltage for active resistors (5 V)
Pin 8 RxD/TxD-N Receive/Transmit Data Negative (A-line)

Alternative Models & Compatibility

While the standard BK3120 and BK3150 function purely as non-programmable PROFIBUS couplers, the BC3150 offers a built-in PLC engine. When transitioning from BK series couplers to the BC3150, physical space on the DIN rail remains compact, but modifications in the master TwinCAT runtime system config are necessary to accommodate local program execution variables rather than straight I/O pass-through mapping.

Application Pitfalls & Engineering Notes

Calculate the cumulative power draw of all connected Bus Terminals prior to mounting. Since the internal K-bus current capability peaks at 1750 mA, complex analog I/O clusters or high-density digital modules may exhaust this allocation. In cases of power depletion, deploy intermediate Beckhoff KL9110 or KL9210 power feed terminals to prevent diagnostic bus failures and system drops.

Commissioning & Wiring Tips

To guarantee clean communications up to 12 Mbaud, use PROFIBUS-certified shielded twisted-pair cabling. Maintain active bus termination at both the beginning and end of each PROFIBUS physical segment. During commission, configure address settings accurately via the KS2000 software tool or through the built-in rotary DIP switches situated beneath the terminal cover.

Installation Guidelines

CRITICAL WARNING

Isolate all electrical power sources before initiating hardware installation or disassembly. Working under voltage presents severe risk of electrical shock, equipment damage, or communication system corruption. Verify the ground potential is fully clamped before introducing power contacts.

1

Mount the BC3150 securely onto a 35 mm DIN rail (conforming to EN 60715) until the locking latch clicks firmly into place.

2

Wire the supply terminals using flexible or solid conductors (0.08 to 2.5 mm square section) and standard ferrules, securing with spring-clamp actuation.

3

Verify connection stability, assign the target PROFIBUS station address, plug in the 9-pin D-sub PROFIBUS trunk line, and power on.

FAQ

What is the maximum number of Bus Terminals that can be connected to the BC3150?

The BC3150 natively supports up to 64 Bus Terminals. If a K-bus extension is integrated, the system can expand to support a total of 255 Bus Terminals.

How is the local PLC program loaded onto the BC3150?

Programming is executed via Beckhoff TwinCAT. The logic can be transferred either directly through the programming interface using a dedicated cable or directly over the PROFIBUS fieldbus network.

How do you set the PROFIBUS address on this controller?

The PROFIBUS station address is configured either using the KS2000 configuration software or directly via the integrated hardware DIP switches.

What happens if the current load of my connected I/O exceeds 1750 mA?

Exceeding the 1750 mA K-bus limit will cause communication failures or system resets. To prevent this, you must insert a power feed terminal, such as the KL9110, to refresh the system bus power.

View all FAQs →

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  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
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Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
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Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
Germany

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