Beckhoff BK5151 Bus Coupler CANopen Compact Module

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Manufacturer: BECKHOFF
Product No.: BK5151
Country of origin:Германия
Product Type: CANopen Bus Couplers
Payment: T/T, Western Union
Weight: 1000g
Shipping port: Xiamen
Warranty: 12 months

Description

Integrating standard K-bus I/O terminals into high-speed CANopen fieldbus networks, the Beckhoff BK5151 offers a compact, cost-efficient interface solution. This unit acts as a gateway, mapping standard terminal signal channels to the CANopen communication layer and process image. The complete Beckhoff BK5151 system supports automatic baud rate configuration and diagnostic feedback, ensuring seamless integration into distributed control systems.

Features

Flexible Expansion: Connects up to 64 local Bus Terminals, with support for up to 255 terminals via K-bus extension units.
High-Speed Communication: Automatic baud rate detection supports transmission speeds reaching up to 1 Mbaud.
Robust K-Bus Power Supply: Generates up to 1750 mA of current output for internal electronics of connected terminals.
Rich CANopen Services: Fully supports emergency objects, variable mapping, Node Guarding, Life Guarding, and store/restore options.
Configurable Transfer Modes: Supports synchronous, cyclic, event-driven, and polling-based PDO modes.

Applications

Decentralized factory automation and plant control systems.
Hazardous environments requiring ATEX and IECEx Zone 2 intrinsic safety ratings.
Material handling and machine building environments using centralized CANopen masters.

Technical Specifications

Parameter	Specification
Manufacturer	Beckhoff
Model / SKU	BK5151
Fieldbus Protocol	CANopen
Bus Interface Connection	9-pin D-sub socket
Baud Rate	Up to 1 Mbaud (automatic detection)
Number of Bus Terminals	64 (up to 255 with K-bus extension)
Internal K-Bus Current	1750 mA
Power Supply Voltage	24 V DC (-15% / +20%)
Diagnostic LEDs	2 x power supply, 2 x K-bus, 2 x fieldbus
Protection Rating	IP20
Operating Temperature Range	-25 to +60 degC
Storage Temperature Range	-40 to +85 degC
Hazardous Area Certifications	ATEX: II 3G Ex ec IIC T4 Gc / IECEx: Ex ec IIC T4 Gc
Net Weight	100 g
Shipping Weight (Calculated)	1.0 kg

Empirical Engineering Insights

Alternative Models & Compatibility

The BK5151 replaces older BK5120 couplers in typical architectures. However, configure your software environments carefully: any hardware modifications or firmware transitions from standard BK series to the compact "BK5151" require an updated EDS (Electronic Datasheet) file imported directly into your CANopen master configuration utility to correctly register the updated device ID and dynamic mapping options.

Application Pitfalls & Engineering Notes

When sizing your system, calculate the total current consumption of the connected K-bus terminals. Although the integrated power unit outputs 1750 mA, exceeding this threshold will trigger a K-bus undervoltage alarm, interrupting communication. If your I/O array draws higher currents, insert a PE2001 power feed terminal downstream on the rail to supply supplemental voltage.

Commissioning & Wiring Tips

Always ensure that both physical ends of the CANopen network bus segment are terminated with a standard 120-Ohm resistor connected between CAN-H (pin 7) and CAN-L (pin 2). Omission of physical termination is a primary cause of packet collisions, CRC errors, and intermittent bus-off states. Use only double-shielded twisted pair copper media for field connections.

Installation Guidelines

CRITICAL WARNING: Completely isolate and lock out all 24 V DC power supplies prior to mounting, connecting, or disconnecting the coupler. Live hot-plugging of the local K-bus terminals can cause physical hardware damage and electrical system instability.

Mount the BK5151 unit firmly onto a standard 35 mm DIN rail (EN 60715) with vertical orientation for optimal heat dissipation.

Assemble the subsequent K-bus terminals onto the right side of the coupler unit, ensuring all physical mechanical and electrical side-locking tabs align and snap together securely.

Connect the 9-pin D-sub CAN interface, apply termination resistors if the unit is located at the physical ends of the line, and plug in the 24 V DC auxiliary feed wiring.

Key Features:

What is the maximum K-bus current capacity of the BK5151?

The BK5151 compact bus coupler supplies up to 1750 mA to power the internal electronics of the connected K-bus terminals.

How many K-bus terminals can be physically connected to this coupler?

You can connect up to 64 standard Bus Terminals directly. With K-bus extension terminals, the architecture can scale up to 255 terminals.

Does this module support automatic CANopen baud rate detection?

Yes, it automatically detects transmission speeds up to 1 Mbaud, ensuring compatibility with configured master nodes on the fieldbus segment.

What kind of fieldbus connector does the BK5151 use?

The module is designed with an integrated D-sub 9-pin socket for standard, rugged fieldbus connections.

Глобална експресна доставка

Стандартна доставка: 4-6 работни дни чрез DHL, FedEx и UPS.
Експресна изпращане: Изпращане в същия ден за налични поръчки, направени преди 14:00 ч. (GMT+8).
Глобално покритие: Обслужваме над 150 държави, включително бърза доставка до Саудитска Арабия и ОАЕ.

Връщания и гаранция

30-дневна гаранция: Връщания се приемат за налични продукти в оригинална, фабрично запечатана опаковка.
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Beckhoff BK5151 Bus Coupler CANopen Compact Module