BECKHOFF BK8000 RS485 Bus Coupler

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Manufacturer: BECKHOFF
Product No.: BK8000
Country of origin:Germany
Product Type: RS485 Bus Couplers
Payment: T/T, Western Union
Weight: 170g
Shipping port: Xiamen
Warranty: 12 months

Description

Designed for reliable industrial fieldbus integration, the Beckhoff BK8000 Bus Coupler links modular Beckhoff Bus Terminals directly to RS485 network architectures. This interface module processes up to 512 digital input/output channels and 256 analog input/output channels, translating physical peripheral signals into the open, documented RS485 serial communication protocol. System parameters and node addressing are easily set up using the KS2000 configuration software, ensuring seamless commissioning and diagnostics.

The BK8000 acts as the central decentralized head station, managing the internal K-bus system and distributing power to downstream terminal slices. With integrated galvanic isolation separating the fieldbus connection, the internal electronic components, and the 24 V DC power contacts, this bus coupler delivers excellent noise immunity and operational stability in demanding electrical environments.

Features

Efficient connection of up to 64 local Beckhoff Bus Terminals to an RS485 fieldbus network.
Direct configuration and advanced diagnostic mapping via the KS2000 software interface.
Galvanic isolation up to 500 V between power contacts, internal supply voltage, and the fieldbus interface.
Integrated power supply terminal designed to supply the internal K-bus with up to 1750 mA.
Support for standard serial transfer media via screened, twisted-pair copper cabling.

Applications

Industrial process automation and distributed control systems (DCS).
HVAC and building automation networks utilizing RS485 multidrop configurations.
Machine building and production lines requiring decentralized input/output blocks.
Energy management and remote telemetry systems.

Technical Specifications

Manufacturer	BECKHOFF
Model / Part Number	BK8000
Protocol	Open, documented protocol
Bus Interface	RS485 D-sub
Data Transfer Rates	9.6 kbaud, 19.2 kbaud, 38.4 kbaud
Max. Number of Bus Terminals	64
Max. Number of Fieldbus Bytes	512 byte input / 512 byte output
Digital Peripheral Signals	512 inputs / outputs
Analog Peripheral Signals	256 inputs / outputs
Power Supply	24 V DC (-15 % / +20 %)
Input Current	70 mA + (total K-bus current) / 4 (Max. 500 mA)
Starting Current	2.5 x continuous current
Recommended Fuse	≤ 10 A
K-Bus Current Supply	1750 mA
Power Contacts Max.	24 V DC / Max. 10 A
Electrical Isolation	500 V (power contact / supply voltage / fieldbus)
Operating Temperature	0 to +55 degC
Storage Temperature	-25 to +85 degC
Relative Humidity	95 %, non-condensing
Vibration / Shock Resistance	Conforms to EN 60068-2-6 / EN 60068-2-27
EMC Immunity / Emission	Conforms to EN 61000-6-2 / EN 61000-6-4
Protection Rating	IP20
Installation Position	Variable
Weight	Approx. 170 g

Installation Guidelines

Mounting: Install on standard 35 mm DIN rail (EN 60715) in a clean, dry control cabinet. The installation position is variable, but vertical alignment is recommended for optimal convection cooling.
Wiring: Always use shielded, twisted-pair copper cables (recommended cross-section: 2 x 0.25 mm²) for the RS485 communication line to prevent electromagnetic interference.
Grounding: Ensure the DIN rail and the PE (protective earth) connection points are bonded to a low-impedance ground plane.
K-bus Protection: Ensure the total current consumption of connected Bus Terminals does not exceed the maximum K-bus current supply of 1750 mA. Install a power feed terminal if current requirements exceed this limit.

Compliance and Certifications

CE: Yes
UL: Yes
ATEX Markings: II 3 G Ex ec IIC T4 Gc
IECEx Markings: Ex ec IIC T4 Gc
Marine Approval: DNV GL

Key Features:

What is the maximum number of Bus Terminals that can be connected to the BK8000?

The BK8000 RS485 Bus Coupler supports up to 64 local Bus Terminals.

How is the Beckhoff BK8000 configured?

Configuration and diagnostic parameterization are performed using the Beckhoff KS2000 software tool.

What data transfer rates does the BK8000 support?

The module supports data transfer rates of 9.6 kbaud, 19.2 kbaud, and 38.4 kbaud.

What is the maximum current capacity supplied to the K-bus?

The BK8000 supplies a maximum internal K-bus current of 1750 mA to power the connected terminal slices.

Is the BK8000 certified for use in hazardous areas?

Yes, the BK8000 carries ATEX (II 3 G Ex ec IIC T4 Gc) and IECEx certifications for Zone 2 hazardous environments.

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

BECKHOFF BK8000 RS485 Bus Coupler