OAKWOOD, Ga. - TelAve -- Plant engineers upgrading older production lines often face limited cable routing options. In retrofit projects, Ethernet cables may run near motor power cables, variable frequency drives, and other equipment that generates electromagnetic interference (EMI). This can degrade signal integrity and contribute to communication errors, packet loss, network instability, and downtime.

What EMI Means for Brownfield Projects

EMI is unwanted electromagnetic energy that introduces noise or distortion into electrical signals. Common industrial sources include motors and power distribution equipment. Electromagnetic susceptibility (EMS) describes a device's ability to withstand these disturbances. Both are part of electromagnetic compatibility (EMC), which helps equipment operate reliably without interfering with nearby systems.

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In brownfield facilities, communication and power cables often share limited pathways. Selecting shielded components and using an effective grounding strategy can improve network reliability.

Shielded M12 Ethernet Cordsets

One way to reduce EMI-related risks is by using shielded M12 D-coded Ethernet cordsets. These assemblies combine an M12 connector on the field side with an RJ45 connection for switches and controllers. Shielded versions are available with the cable shield terminated at both ends or at the RJ45 end only, supporting different grounding requirements.

Cordsets are available with PVC, PUR, or TPE cable jackets and nickel-plated brass housings. The M12 mating interface is rated IP69 for protection against dust and high-pressure washdown, while the RJ45 interface carries an IP20 rating for use inside an enclosure. This combination supports reliable connectivity where vibration, moisture, oils, and contaminants may be present.

EMI Shielding Cable Glands

EMI shielding cable glands create a grounding connection between the cable shield and enclosure wall. Constructed from nickel-plated brass and rated IP68, these glands are available in metric and PG thread sizes. They can often match existing panel cutouts, helping avoid enclosure modifications during a retrofit.

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The glands also help maintain shield continuity as cables enter control panels, supporting an effective grounding and bonding strategy.

Planning Considerations

Reliable industrial Ethernet performance starts with proper cable routing. Whenever possible, communication and power cables should be separated to reduce EMI exposure. When routing options are limited, shielded M12 Ethernet cordsets and properly grounded EMI shielding cable glands can support stable communication and long-term network reliability.

About Mencom Corporation

Mencom Corporation manufactures industrial power, control, signal, and networking connectivity solutions. Its portfolio includes circular and rectangular connectors, panel interface connectors, cable glands, and industrial networking products, including M12 D-coded Ethernet cordsets and EMI shielding cable glands. Mencom also serves as the U.S. Master Distributor for ILME heavy-duty rectangular connectors.

For more information, visit https://www.mencom.com.