Connection technology for HVAC & building technology.
We assemble Control and bus cabling, sensor/actuator cables and Connection cables for actuators exactly to the requirements of your RLT system, building management technology, or refrigeration/heating technology — with technical consultation upfront, manufacturer-independent, from a single unit.
- Minimum order quantity
- 1 piece
- Quote
- ≤ 24 h
- Prototype
- 1–2 weeks
- Manufacturer
- All common
01 · Why KnorrTec
Four reasons why KnorrTec is the right partner for your building-technology connections.
As a cable assembler — not a distributor — we bring the technical expertise that's essential for reliable connections in shafts, suspended ceilings, and rooftop installations. We don't supply standard off-the-shelf parts; we develop the connection that fits your system.
Technical consultation in advance
Before we begin assembly, we clarify your requirements together — system type, cable routing, ambient conditions, bus or signal protocol. That way, the cable set fits right the first time.
Custom assembly from quantity 1
No minimum order quantity. Exactly your length, your connector, your jacket material — from a replacement cable for a single unit to equipping multiple systems.
Manufacturer-independent
Compatible with all common RLT units, GLT/BMS systems, and refrigeration/heating technology systems. We know the market-standard connection specifications and supply the right connection — independent of your system's manufacturer.
Tested quality
Every assembled cable is 100% electrically tested. Connectors in protection classes up to IP69K for outdoor units and damp technical rooms — with a test report on request.
02 · Technical Requirements
What cables in building technology need to deliver.
Shafts, suspended ceilings, and rooftop installations each place their own demands on routing and material. Knowing the boundary conditions of a building technology system is what it takes to choose the right cable — that's the consulting expertise KnorrTec brings.
Flexible custom lengths
Cable routes in shafts and suspended ceilings are rarely identical. We assemble the exact length of your cable route — with no offcuts or extension couplings.
Bus Cabling for Building Automation
Decentralized sensors and actuators in the GLT/BMS require shielded, interference-resistant bus cables — reliable even over long distances between floors and technical rooms.
Moderate weather resistance
Outdoor units and rooftop installations are exposed to UV radiation, moisture, and temperature fluctuations. We select a jacket material that reliably withstands these conditions over the long term.
Compact Dimensions
Space is limited in cable ducts and suspended ceilings. Compact, space-saving cable cross-sections make routing easier alongside ventilation and plumbing installations.
Maintenance-friendly connectors
Access panels are often hard to reach. Pluggable connections instead of terminal points make replacement and maintenance easier without dismantling the system.
EMC shielding
Variable frequency drives on fan motors generate interference fields that affect sensitive bus and sensor cables. Braided shields reliably protect signal transmission.
„No off-the-shelf cable for the shaft. Every connection we deliver was discussed with you beforehand."
KnorrTec — cable assembler, not a distributor.
03 · Made-to-Measure Assembly
From requirement to finished cable — starting at a single piece.
We are not a mail-order catalog. Every cable we supply was specified together with you and manufactured at our facility in Beratzhausen. That's the difference between a connection that holds up in the shaft — and one that fails.
Inquiry & Consultation
You describe your requirements: system type, cable routing, environment, bus or signal protocol. We ask the right questions — and together we find the optimal cable specification.
Technical specification
Our team determines conductor cross-section, shielding structure, sheath material, connector, and protection rating — documented as a drawing for your records.
Assembly
We manufacture in our own facility — exactly your length, your connector, your print marking. From a single unit to equipping multiple systems, with the same materials and processes.
Testing & Delivery
Every cable is electrically tested. Delivered with a test report — on request with labeling and set packaging for direct on-site installation.
No standard solution for your application?
Describe your system to us — we'll get back to you within 24 hours with a concrete recommendation.
04 · Applications
Three building technology segments — one source.
Whether ventilation systems, building management technology, or refrigeration/heating technology — we know the specific cable requirements of each segment and deliver the right assembly.
B.01
Ventilation Technology (RLT)
Supply and exhaust air units, damper actuators, fans — the right control and connection cable for every component. Compact, maintenance-friendly, tailored to the cable route.
- Control cables for damper actuators
- Connection cables for fan motors
- Sensor cables for temperature & pressure
- Flexible custom lengths for shaft routing
B.02
Building Management Systems (GLT/BMS)
Decentralized sensors and actuators require interference-resistant bus cabling over often long distances. We assemble cables to match your system topology and cable routing.
- Shielded bus cables for field level
- Sensor and actuator cables with M12
- RJ45 industrial network cabling
- Maintenance-friendly connectors
B.03
Refrigeration & Heating Technology
Refrigeration systems, heat pumps, and heating controls require robust connection and sensor cables that work reliably even under fluctuating temperatures.
- Connection cables for compressors & pumps
- Sensor and probe cables for control systems
- EMC-shielded cables for frequency inverters
- Weather-resistant outdoor cabling
05 · Product Categories
The product range for building technology.
RLT control cabling
Control and connection cables for damper actuators, fans, and supply/exhaust air units — assembled to your desired length and connector.
BMS Bus Cabling
Shielded bus cables for decentralized sensors and actuators in building automation — reliable over long distances through shafts and suspended ceilings.
Refrigeration & Heating Technology Cabling
Connection and sensor cables for refrigeration systems, heat pumps, and heating controls — weather-resistant for outdoor use.
Connection cables for actuators
Damper, valve, and pump actuators need compact, maintenance-friendly connection cables with pluggable connections for replacement during servicing.
Device accessories
Cable glands, connector accessories, and mounting materials for professional connection in control cabinets and technical rooms.
D-Sub connectors
For GLT/BMS interfaces and sensors — individually or as an assembled cable set, in the protection class suited to your application.
06 · Compatibility
Compatible with all common interfaces.
KnorrTec assembles cables independently of manufacturer — we adapt to the connectors and bus protocols already installed in your system, instead of tying you to a specific make.
07 · Standards & Certifications
Certified for technical use.
Every assembled building technology cable is 100% electrically tested. Test reports available on request.
08 · Frequently Asked Questions
To building technology cable assembly.
From what quantity does KnorrTec produce custom cable assemblies?
From a single piece. There is no minimum order quantity. Whether it's a replacement cable for a single ventilation unit, a custom length for shaft routing, or series equipment for multiple systems — we manufacture the quantity you need, with no surcharge for small quantities.
What exactly does “technical consultation up front” mean?
Before we begin assembly, we clarify together: What system type, what cable routing (shaft, suspended ceiling, outdoor area)? What ambient conditions (weather, temperature, IP requirements)? What bus or signal protocol and which connectors are already installed? This conversation ensures that the cable set on first installation fits — and doesn't need to be replaced after the first service.
How long does a custom assembly take?
You will receive technical feedback and a quote within 24 hours after your inquiry. Prototypes are typically available in 1–2 weeks available. Series production depending on scope and material availability on request — we communicate delivery dates transparently and reliably.
What requirements does building automation place on bus cabling?
Decentralized sensors and actuators in building management systems require shielded, interference-resistant bus cables, which also reliably transmit over long distances through shafts and suspended ceilings. We assemble the matching bus cabling to your system topology and custom length — including the matching connectors.
For which systems does KnorrTec supply compatible cables?
We assemble manufacturer-independent for all common RLT units, GLT/BMS systems, and refrigeration and heating technology systems. Since we're not tied to a specific make, we can also develop suitable solutions for older system inventories — simply state the system type and connection standard in your inquiry.
Building Technology Inquiry
Request a cable set for your system.
Tell us your system type, cable routing, and operating conditions — we will get back to you within 24 hours with a technical recommendation and quote. From a single unit, with no minimum order quantity.