Description
Beckhoff KL9050-0000 K-Bus bus terminal — description and applications
The Beckhoff KL9050-0000 K-Bus bus terminal is part of the Bus Terminal system (KL series), responsible for isolating and re-feeding the potential supply to the next segment of a K-Bus station. According to the description on the manufacturer's original packaging, it is a "Terminal bus extension, coupler terminal" — i.e. a terminal that couples and extends the internal K-Bus between Beckhoff I/O modules. The product is intended for automation system integrators, maintenance departments, and service teams involved in upgrading or repairing existing installations based on KL-series couplers and modules.
The terminal comes in a version approved for potentially explosive atmospheres — the II 3G KEMA 10ATEX0075X Ex nA II T4 marking on the housing indicates it is intended for operation in gas atmospheres (category 3G). It mounts on a standard DIN rail, within the terminal row between the I/O terminals of a given station.
Key features
- K-Bus extension and coupler terminal function — confirmed by the manufacturer's description on the packaging label ("Terminal bus extension, coupler terminal")
- Isolated Vk potential supply: Vk 0V (1) and Vk 24V (5) terminals, independent of the station's main 24V/0V/PE supply (terminals 2/6, 3/7, 4/8)
- Bus operation diagnostics via LED-RUN and LED-ERR indicators
- Approved for operation in potentially explosive atmospheres: II 3G KEMA 10ATEX0075X, Ex nA II T4, ambient temperature range 0…+55°C
- cULus (US Listed) certification and compliance with RoHS Directive 2011/65/EU
- "Next-Last" function switch for setting the terminal's position in the station (exact operation to be verified in the Beckhoff documentation)
Technical specifications
The table below lists the confirmed parameters of the Beckhoff KL9050-0000 K-Bus bus terminal, based on the module's nameplate and the packaging label.
| Parameter | Value |
|---|---|
| Manufacturer | Beckhoff |
| Device type | K-Bus bus terminal (bus extension / coupler terminal) |
| Series | Bus Terminal, KL series |
| Catalog number (packaging) | KL9050-0000 |
| Marking on the module | KL9050 |
| Serial number | 37170106 |
| Vk potential supply voltage | 24 V DC |
| Communication interface | K-Bus IN / OUT |
| Diagnostic indicators | LED-RUN, LED-ERR |
| Explosion protection | II 3G KEMA 10ATEX0075X, Ex nA II T4 |
| Operating temperature (Ta) | 0…+55 °C |
| Connection wire cross-section | AWG 20-14 |
| Certifications | cULus (US Listed), RoHS 2011/65/EU |
| Mounting | DIN rail |
| Country of manufacture | Germany (Made in Germany) |
| Condition | brand new (factory new), unused (new-old-stock) |
Applications
The Beckhoff KL9050-0000 K-Bus bus terminal is used in distributed I/O systems built with KL-series terminals — in production lines, industrial machinery, and installations requiring segmentation or extension of the K-Bus station. Thanks to its Ex nA approval, the component is also used in installations covering explosion-hazard zones (category 3G). It is a typical replacement part when servicing and upgrading existing control cabinets fitted with Beckhoff K-Bus couplers and terminals.
Condition and scope of delivery
The Beckhoff KL9050-0000 K-Bus bus terminal on offer comes from surplus stock (new-old-stock) — it is brand new (factory new), unused and never installed in any system. The photos show the original manufacturer's packaging with the red Beckhoff label, the description "Terminal bus extension"
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