Product Bulletin Panduct PanelMax Shielded Wiring Duct and Noise Shield PanelMax Shielded Wiring Duct and Noise Shield route, separate, and shield sensitive wiring from noise emission. This allows pathways to be placed in closer proximity, saving valuable space within industrial control panels. The shielding provides up to 20dB reduction in noise (EMI/RFI), or 90% noise voltage reduction (NVR), which is equivalent to 6 inches of air spacing between sensitive and noise-emitting wiring.* ** Several wire routing and segregation configurations are possible with the innovative Shielded Wiring Duct and Noise Shield, delivering greater design flexibility to satisfy a wide range of applications. These products are part of the broad range of reliable product systems offered by the Panduit Industrial Automation Solution. These product PanelMax systems aid in reducing design and assembly time, create valuable panel PanelMax Shielded Wiring Duct space savings, and provide easier installation and maintenance. Noise Shield PanelMax Shielded Wiring Duct Key Features Benefits Durable metallic foil covers and shields outer duct surfaces providing EMI/RFI noise Continuous foil shield* ** reduction between sensitive and noisy wiring for up to 20dB reduction in noise, or 90% NVR (equivalent to 6 inches of air spacing) Provide wire management capability and noise reduction in the full height of the duct Slotted sidewalls with horizontal slot size compatible with various wire types and sizes, including UTP Ethernet cabling bridge connectors High-quality Panduit PVC wiring Fully contains and protects wiring easy to cut and install ensures reliable performance and improved aesthetics used with standard Panduit wiring duct cover u duct base installs with standard fasteners, including Panduit NR1 rivets Upper and lower score lines Facilitate duct finger and sidewall section removal to ease installation and wire routing PanelMax Noise Shield Key Features Benefits Reduces EMI/RFI noise between sensitive and noisy wiring for up to 20dB reduction Metal noise barrier* ** in noise, or 90% NVR (equivalent to 6 inches of air spacing) innovative design installs easily within Panduit wiring duct or when mounted separately, delivering greater design flexibility to satisfy a wide range of applications When installing the shield inside a wiring duct, the bonding clip maintains electrical Bonding clip continuity between the panel and shield for optimal noise mitigation and aesthetics Segmented design Speeds installation by allowing section(s) of the shield to be cut and snapped off at intervals to easily size shield to length, with minimal deburring Vertical wall slots Allow wires to cross the barrier at 90 when necessary, providing greater design flexibility Allow wire bundles to be held in place using cable ties to optimize cable management Horizontal cable tie slots and aesthetics Zinc-plated steel and durable Durable powder-coated vertical surfaces for smooth edges uncoated, corrosion resistant, zinc-plated surface in shield contact area with sub-panel, ensures continuity black powder-coated surfaces for proper bond to ground *Recommendations for distance separation between noisy and low-noise zones are referenced in IEEE 1100 Emerald Book, Recommended Practice for Powering and Grounding Electronic Equipment. Consult the component manufacturer for specific wire segregation distance requirements. **PanelMax Shielded Wiring Duct and Noise Shield deliver approximately 20dB of noise reduction across common industrial noise frequencies at 30mm wire separation with an approximate 1 meter coupling length. The shielded wiring duct or noise shield, bonding clip (if used) and enclosure must be electrically bonded to ground for the shield to be effective (see Panduit installation instructions EP001, for shielded wiring duct or RW260, for noise shield). For reference on optimal control panel layouts see the Panduit Industrial Ethernet Physical Infrastructure Reference Architecture Design Guide. u UL Recognized continuous use temperature: 122F (50C)Product Selection Guide Noise and Its Effects on Industrial Controls Source One of the core issues affecting the performance and reliability of industrial control systems is electrical noise emitted from devices. This electrical noise can create voltage spikes in victim wiring, affecting component performance (as figure at left depicts). Victim Potential noise emitters/wiring Sensitive devices/wiring Business Risks Variable frequency and servo Communications/network Productivity loss motor drives wiring (UTP Ethernet, RS232) Downtime Switching power supplies High-speed counting signals Maintenance/repair costs Contact switching of coils Controllers Device replacement costs and solenoid valves Microprocessor based devices Troubleshooting costs Proper noise mitigation and panel layout practices help to ensure system productivity, quality, and safety. Panel designers have historically used air spacing between components and wire pathways for noise mitigation, per IEEE recommendations. With Panduit PanelMax Shielded Wiring Duct and Noise Shield, panel designers can provide noise mitigation with reduced air spacing requirements allowing for a space optimized control panel layout. Multi-Layered Noise Prevention and Mitigation Panduit recommends following a multi-layered electrical noise prevention and mitigation strategy that also optimizes control panel space utilization. This strategy includes grounding/bonding, segregation, shielding, and filtering practices to provide optimal protection. This product bulletin focuses on noise mitigation via shielded wiring duct and noise shield products. Refer to Panduits white paper WP-14, Optimizing Control Panel Layouts for Noise Mitigation in Factory Automation Systems, for greater detail on other strategy recommendations. Considering Shielded Cables vs. Shielded Wiring Duct and Noise Shield An alternative to shielded wiring duct or noise shield is to consider an increased use of shielded cables, such as shielded twisted pair network cables and shielded control cables. Shielded cables provide superior noise mitigation and noise voltage reduction, but at a typically higher premium and installed cost than unshielded cables. Panduit PanelMax Shielded Wiring Duct and Noise Shield add project value by providing sufficient noise mitigation at a lower premium than a shielded cable solution. Shielded Wiring Duct and Noise Shield advantages: Routing 10 standard unshielded cables in shielded wiring duct has up to a 35% lower purchased cost vs. 10 shielded cables routed in conventional wiring duct Shielded wiring duct and noise shield provide an effective noise mitigation solution when a shielded cable option is not available or is difficult to source 2