By Eileen Harvey
PROFINET cables are the lifelines of industrial automation, enabling real-time communication between PLCs, sensors, actuators, robotics and machines. They are designed for reliability, low latency and robust new qualities that make them essential in factories and industrial plants.
But what happens when your application moves outside the factory walls? Can you use PROFINET cables outdoors, where they’re exposed to UV light, extreme temperatures, moisture, oil and mechanical stress?
Yes, PROFINET cables can be used outdoors but only if they’re designed for it. Let’s explore what makes a PROFINET cable outdoor-ready, what challenges exist and how to choose the right option.
PROFINET Cables and Outdoor Environments
Standard PROFINET cables are typically designed for indoor environments, where conditions are controlled. When moved outdoors, they face new challenges:
- UV degradation: Standard PVC jackets crack under sunlight.
- Moisture and humidity: Leads to insulation breakdown.
- Temperature extremes: Cold can stiffen PVC, heat can soften it.
- Mechanical stress: Cables may run underground, across rooftops or in exposed conduits.
Using indoor-rated PROFINET cables outdoors without protection often leads to early failures, communication errors and costly downtime.
Jacket Materials for Outdoor Use
The cable jacket material is the first line of defense against harsh outdoor conditions. Here’s how the main types compare:
3.1 PVC (polyvinyl chloride) is cost-effective and widely used. It works well indoors but poorly outdoors due to UV sensitivity, and it has limited chemical and oil resistance.
3.2 PUR (polyurethane) has strong resistance to UV, oil, abrasion and chemicals. It is flexible, suitable for dynamic and outdoor use. And it is ideal for robotics and outdoor motion control.
3.3 TPE (thermoplastic elastomer) is excellent for extreme temperatures (both hot and cold). It is very flexible, perfect for continuous flex applications. TPE has strong resistance to moisture and weathering.
Shielding and Protection in Outdoor Installations
Outdoor environments often have higher levels of electromagnetic interference (EMI) from power lines, motors and wireless systems. To combat this, foil shielding (FTP) protects against high-frequency interference. Braided shielding (STP) is effective against low-frequency noise. And combination shielding (S/FTP) is the best of both worlds, ideal for outdoor reliability.
Additionally, always ensure proper grounding of shielding, and consider using metal conduits or armored cables for physical protection.
Cable Standards and Certifications
When looking for PROFINET cables that will last outdoors under industrial conditions, look for four types of certifications. First, a PROFINET certification (PI-certified) guarantees performance. Second, UV-resistant ratings (UL CMX, UL Outdoor) ensure protection from sunlight. Third, oil-resistant and chemical-resistant ratings are UL OIL RES I/II. And finally, look for ingress protection (IP67 or higher) for connectors.
Typical Outdoor Applications
Outdoor-rated PROFINET cables are commonly used in a variety of demanding environments. They connect distributed control panels between buildings and provide reliable communication links in renewable energy plants such as wind turbines and solar fields. These cables perform well in mining and oil field operations where they must withstand harsh outdoor conditions. They are also used in automated guided vehicles (AGVs) and outdoor robotics, where flexibility and durability are essential. In marine or offshore environments, outdoor PROFINET cables resist saltwater and chemical exposure to maintain long-term performance.
Tips for Reliable Outdoor Installation
To ensure dependable performance, installations should maintain adequate distance from power lines to minimize electromagnetic interference. Weatherproof connectors help prevent moisture ingress, and installers should avoid sharp bends to preserve the proper bending radius. Conduits are recommended when mechanical stress is likely, and fiber optic PROFINET cables should be selected for runs extending beyond 100 meters.
Recommendations and Best Practices
For general outdoor applications, PUR jacket PROFINET cables provide excellent durability. In extreme climates, TPE jacketed cables offer superior resistance to temperature fluctuations. When transmission distances exceed 100 meters, fiber optic PROFINET cables are the preferred choice. Continuous-flex outdoor cables are ideal for robotic or motion-driven applications. For consistent quality and reliability, it is best to select trusted manufacturers such as TKD Kabel.
Quick Facts
- Standard PROFINET copper length = 100 meters.
- PUR/TPE jackets withstand UV, oil and chemicals.
- Fiber optic PROFINET = several kilometers outdoor run.
- Outdoor connectors must be IP67-rated.
FAQs (Frequently Asked Questions)
Q1: Can I use indoor PROFINET cables outdoors if I put them in conduits?
A: Yes, but it’s not recommended long-term. UV and moisture can still damage the cable over time.
Q2: What’s the best jacket material for outdoor PROFINET cables?
A: PUR for durability, TPE for extreme weather and PVC only for temporary use.
Q3: Do outdoor PROFINET cables need shielding?
A: Yes—especially in industrial zones with heavy EMI. Use double-shielded cables.
Q4: How long do outdoor PROFINET cables last?
A: With proper installation and the right jacket, they can last 10 to 15 years outdoors.
So, can PROFINET cables be used outdoors?
Yes—but only if you select the right type. Standard indoor PVC PROFINET cables won’t survive UV, chemicals and weather for long. Instead, choose PUR or TPE jacketed PROFINET cables, with proper shielding and certifications, for reliable performance.
For extended distances, fiber optic PROFINET is the most robust choice. By investing in outdoor-ready PROFINET cables from trusted suppliers like L-com and TKD Kabel, you ensure long-lasting performance, minimized downtime and a future-proof industrial network.
Explore the full range of TKD Kabel through L-com. We’ll fill your orders fast, with same-day shipping on all qualified, in stock, online orders received Monday through Friday before 5 p.m. EST. For TKD-related inquiries, connect with our U.S-based TKD expert Eileen Harvey at eharvey@infiniteelectronics.com.
