Description
Beckhoff KL6051 communication terminal — description and applications
The Beckhoff KL6051 communication terminal is an RS422 serial interface module belonging to the Bus Terminal (KL) family, developed by Beckhoff for the modular construction of input/output stations in industrial automation systems. The module handles data exchange with external devices over the RS422 protocol, at transmission speeds of up to 62500 Baud, and is intended for automation integrators, machine builders, service providers and maintenance departments that rely on Beckhoff infrastructure.
In practice, the Beckhoff KL6051 communication terminal is used as part of a distributed I/O system wherever serial communication is needed with readers, scales, measuring transducers or other devices equipped with an RS422 port. The module is mounted on a DIN rail, connecting mechanically and electrically to the other KL-series terminals and bus couplers.
Key features
- RS422 interface supporting data transmission up to 62500 Baud
- 8-pin connection with RxD+/RxD-, TxD+/TxD-, GND and Shield lines
- LED indicators showing Run, TxD and RxD status
- ATEX II 3G certificate KEMA 10ATEX0075 X Ex nA IIC T4 Gc — for use in potentially explosive atmospheres (scope of application to be verified)
- CE and UL Listed markings confirmed on the module label
- Operating temperature range 0…+55°C
- Manufactured by Beckhoff Automation GmbH & Co. KG, Made in Germany
Technical specifications
| Parameter | Value |
|---|---|
| Manufacturer | Beckhoff |
| Type | Communication terminal / Bus Terminal series I/O module |
| Series | KL |
| Model / part number | KL6051 |
| Interface | RS422 / Serial Interface |
| Transmission speed | up to 62500 Baud (Data Exchange) |
| Number of connection pins | 8 (Shield, GND, RxD+/RxD-, TxD+/TxD-, LED Run, LED TxD, LED RxD) |
| Certifications | CE, UL Listed, ATEX II 3G KEMA 10ATEX0075 X Ex nA IIC T4 Gc |
| Environmental standard compliance | RoHS 2011/65/EU |
| Operating temperature | 0…+55°C |
| Mounting | DIN rail, Bus Terminal system |
| Serial number of this unit | 39223B09 |
| Country of manufacture | Germany |
| Condition | brand new (factory new), unused (based on photos) |
Applications
The Beckhoff KL6051 communication terminal is used wherever a Beckhoff controller-based system needs to exchange data with devices equipped with an RS422 port — e.g. barcode readers, industrial scales, measuring transducers or lower-level controllers. Typical industries include food processing, automotive, machine building and process automation, where distributed I/O systems based on the Bus Terminal architecture are used.
Thanks to its ATEX certification, the module can be considered for use in potentially explosive atmospheres (zone 3G) — the exact scope and installation conditions for such zones must be verified by the buyer in accordance with the manufacturer's documentation.
Condition and scope of delivery
The Beckhoff KL6051 communication terminal offered here comes from surplus stock (new-old-stock) — it is a brand new (factory new), unused and never-installed product. The photos show the original red Beckhoff packaging and the module itself, with no visible signs of use, scratched pins or corroded terminals. The label on the module and the packaging is legible and includes the full part number and serial number.
Such a new-old-stock unit is a full-value component, often no longer available through regular distribution or offering a much shorter lead time than ordering from the manufacturer. Before purchasing, we recommend reviewing all product photos, as they form an integral part of the description.
Why RECOSTOCK
RECOSTOCK specializes in selling brand new (factory new) industrial automation components sourced from surplus stock and liquidations, at prices lower than in regular distribution. We provide a VAT invoice, secure industrial packaging and shipping from Poland. Drawing on many years of experience in the automation industry, we can also help you select a replacement and verify catalog designations.
Compatibility and installation
The Beckhoff KL6051 communication terminal is designed for installation in the Bus Terminal (KL) system on a DIN rail, together with the appropriate bus couplers and other KL-series modules. Detailed compatibility with a specific I/O station configuration and firmware version depends on the architecture of the existing installation. Before purchasing, be sure to compare the full part number against your machine documentation or the component being replaced to avoid a mismatch.
Documentation and similar products
The full technical specification and installation instructions can be found in the Beckhoff technical documentation. We also encourage you to see other automation components at RECOSTOCK — in our shop you will find a wide selection of I/O modules, PLC controllers, frequency inverters (VFDs) and other industrial automation components.
Frequently asked questions (FAQ)
How can I verify that this is exactly the KL6051 model?
The KL6051 part number is visible on the module label and on the packaging, together with the description “RS422 / Serial Interface, 62500 Baud Data Exchange”. We recommend comparing the full designation against your installation's documentation before purchase.
Is this Beckhoff KL6051 communication terminal compatible with my Bus Terminal station?
The module is compatible with the Beckhoff Bus Terminal (KL) system; however, exact compatibility with a specific configuration and firmware version should be verified against the technical documentation of your installation.
What does new-old-stock status mean?
New-old-stock is a brand new (factory new), unused product originating from surplus stock or a distributor's stock liquidation — it has never been installed or operated, even though it does not come from current production.
How does shipping work and will I receive a VAT invoice?
The product ships from Poland in secure industrial packaging, and a VAT invoice is issued for every order.
Can I get help selecting a replacement?
Yes, the RECOSTOCK team helps verify catalog designations and select a suitable replacement — feel free to contact us with any questions or if you wish to purchase.
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