By Eileen Harvey
Industrial networks today demand more than just basic Ethernet. As process industries shift from analog to digital networking, the reliability of data communication has become mission-critical. In environments filled with noise and physical challenges, shielded Ethernet cables ensure that sensitive automation systems remain connected without interruption. This post explores the challenges of industrial environments, the benefits of shielded cabling and a few best practices for installing them.
Harsh Conditions in Process Industries
Unlike office networks, process automation environments are filled with sources of electrical noise. Motors, drives and control panels generate constant EMI and RFI that can easily disrupt unshielded data cables. In addition, these facilities often face extremes in temperature, moisture and exposure to chemicals or oil. Cables installed in trays or machinery also endure continuous flexing, pulling and vibration, all of which can degrade performance over time if the right cable is not chosen.
Why Shielded Cables Matter in Process Automation
Shielding is what makes stable communication possible in noisy environments. It protects data as it travels between PLCs, SCADA systems and HMIs, reducing the risk of corrupted packets or downtime. This reliability is critical across a range of industries. In refineries, shielded cabling ensures accurate sensor readings across vast networks. In food and beverage operations, it supports real-time monitoring essential for safety and efficiency. In pharmaceutical plants, shielded cables help maintain compliance and traceability in production. And in water treatment facilities, they keep remote I/O devices communicating despite high interference levels.
Applications Across the Process Industry
Shielded Ethernet cables are deployed wherever automation requires uninterrupted connectivity. Inside control cabinets, they defend against EMI in close quarters with drives and relays. On machine networks, they enable high-speed protocols like Ethernet/IP, Profinet and Modbus TCP. In field I/O applications, shielded cables withstand long runs through exposed trays where interference is likely. Even remote sensors and actuators in outdoor or electrically active zones benefit from shielding that helps prevent disruptions from lightning or stray electrical noise.
Installation Tips and Best Practices
Getting the most from shielded Ethernet cables requires proper installation. Always ground the shield according to the network standard, whether at one or both ends of the run. Avoid sharp bends or over-tightening when routing cables through trays or conduits, as this can compromise performance. Finally, match the cable type to both the protocol and the operating environment. For example, Cat6a is often the best choice for vision systems that require high-speed data rates, while rugged PUR or TPE jackets provide protection in harsh chemical or mechanical settings.
Small Investment, Big Impact
In process automation, downtime is costly and disruptions can ripple across an entire production line. By choosing shielded Ethernet cables, organizations make a relatively small investment that delivers significant returns in reliability, performance and peace of mind.
L-com carries a selection of shielded Ethernet cables for process automation, German-engineered by TKD Kabel. They feature foil/braid shielding for strong EMI protection, reliable signal transmission even near high-power equipment, industrial-grade construction with PUR or TPE jacketing, high-flex options and more. They come in RJ45, M12, field-terminated or pre-assembled.
We will 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 more info about TKD cables, please contact Eileen Harvey via email at Eharvey@infiniteelectronics.com or submit this form.
