Panduit FLEX-PLATE4UR HD Flex Trunk Slack Plate with Rear Cover

The Panduit FLEX-PLATE4UR provides 4RU of dedicated cable slack storage for HD Flex fiber enclosure deployments. Designed for datacenter and telecom room installations where maintaining proper fiber bend radius is critical, this trunk slack plate creates a protected rear cavity for storing service loops, pre-terminated assemblies, and excess cable length without compromising front-panel access or patch cord management. The integrated rear cover shields stored cable from dust and accidental contact during adds, moves, and changes.

Key Features

• 4RU (7U) vertical capacity stores up to 30+ meters of slack cable per enclosure bay
• Steel construction supports cable weight without deflection in fully loaded enclosures
• Rear cover protects stored fiber from dust ingress and accidental snags during maintenance
• Integrates with HD Flex enclosure mounting rails—no field modification required
• 17.59" width spans standard 19" rack openings with proper clearance
• RoHS compliant for federal and state procurement compliance

High-density fiber deployments demand clean separation between active patch cords and stored cable slack. The FLEX-PLATE4UR addresses this by creating a discrete rear storage zone within the HD Flex enclosure footprint. When deploying pre-terminated MPO trunk assemblies, breakout harnesses, or OS2 single-mode trunks with 50+ meter lengths, the slack must go somewhere that doesn't interfere with front-panel density or future adds. This plate provides that space while maintaining the minimum 30mm bend radius required by TIA-568 and ISO/IEC 11801 standards.

The rear cover is a critical detail often overlooked in budget slack management solutions. Without it, stored cable is exposed to dust accumulation, accidental snags when adjacent equipment is serviced, and potential damage from rack-mounted gear with rear-protruding components. The FLEX-PLATE4UR cover snap-fits to the plate frame and can be removed tool-free when you need rear access for cable re-routing or equipment decommissioning. For installations requiring frequent rear access—such as colocation facilities where customer turnover is high—the cover can be left off while still providing the structural slack storage frame.

Steel construction is non-negotiable for trunk slack plates in production environments. Aluminum and polymer alternatives sag under cable weight, creating kinks that attenuate signal and fail OTDR testing. The FLEX-PLATE4UR uses cold-rolled steel with a black powder coat finish, providing sufficient rigidity to support 15+ kg of cable mass without visible deflection. This matters when storing multiple 12-strand OS2 assemblies with armored jackets or outdoor-rated cables transitioning from building entrance facilities into the fiber distribution frame.

Installation is straightforward for integrators already working with Panduit's HD Flex enclosure family. The plate mounts to the enclosure's vertical rails using the same tool-free clip system as patch panels and splice modules, providing 50+ lbs pull-out resistance per TIA-942 seismic requirements. The 4RU height allows flexibility in enclosure layout: position the slack plate at the top for overhead cable entry, at the bottom for raised-floor installations, or mid-enclosure between active patch panel zones. For deployments requiring more than 4RU of slack storage, multiple plates can be stacked vertically with no gap requirements.