Panduit F9UYBZRNNSNM015 FlexCore 24-Fiber OS2 LC/APC Front-Access Cassette Assembly

The Panduit F9UYBZRNNSNM015 is a factory-terminated 24-fiber singlemode cassette assembly engineered for high-density fiber distribution frames in datacenter and enterprise backbone deployments. Built on Panduit's FlexCore front-access ODF platform, this assembly ships with 12 duplex LC/APC connectors pre-terminated and polarity-verified on one end and an unterminated 15-meter tail on the opposite side, allowing integrators to splice directly into building entrance feeds or backbone trunks without field-polishing connectors in confined rack spaces. The cassette measures 11.53" wide by 0.46" high (292.8mm × 11.7mm), fitting standard 1U FlexCore chassis while delivering 24 strands of OS2 singlemode fiber rated for 10GBASE-LR, 40GBASE-LR4, and 100GBASE-LR4 applications across campus and metro-distance links. LSZH jacketing meets Euroclass B2ca flame propagation limits, making this assembly compliant for indoor risers and equipment rooms where halogen-free cable is mandated by European EN 50575 or local fire codes.

Key Features

• 24-fiber OS2 singlemode (9µm core) for 10G/40G/100G transmission up to 10km without repeaters
• 12 duplex LC/APC connectors factory-polished to ≤0.25dB insertion loss, eliminating field termination time and return-loss variability
• FlexCore front-access cassette design — all connector access from the rack front, no rear cable management conflicts in back-to-back row layouts
• 15-meter unterminated tail supports fusion splicing to backbone cables or building entrance terminals
• LSZH outer jacket rated Euroclass B2ca — low smoke, zero halogen, compliant for indoor plenum and riser installations per EN 50575
• Polycarbonate cassette housing with laser-etched port labeling and integrated strain relief
• Conforms to ISO/IEC 11801, ANSI/TIA-568-C.3, TIA-604-5 (FOCIS-5), TIA-604-10 (FOCIS-10), and IEEE 802.3 physical layer specs

Panduit's FlexCore cassette system addresses the core challenge of maintaining and expanding fiber infrastructure in space-constrained datacenter rows: front-only access. Traditional ODF enclosures require rear or side access to route and dress incoming trunk cables, which becomes impractical in hot-aisle/cold-aisle configurations or when racks are positioned back-to-back against structural columns. The F9UYBZRNNSNM015 cassette slides into a FlexCore 1U or 2U chassis from the front, with all 12 duplex LC ports presented on the front face and the 15-meter unterminated tail routed through a rear cable manager to a splice enclosure or backbone trunk. Installers can add, move, or replace cassettes without disturbing adjacent rack equipment or pulling rear-mounted cable trays forward — critical during after-hours MACs in live production environments. Each cassette is keyed to prevent reversed insertion, and the front cover includes a clear polycarbonate window for visual port verification without removing the protective door.

The LC/APC connectors are factory-terminated using Panduit's automated polishing process, which holds insertion loss to 0.25dB typical and return loss to better than 60dB across all 24 fibers. Angled Physical Contact (APC) geometry — an 8-degree endface angle — reflects back-reflected light into the cladding rather than back down the core, reducing return loss by 15-20dB compared to standard UPC connectors. This matters in high-speed coherent optics (100GBASE-LR4, 400G-LR8) and analog RF-over-fiber systems where Rayleigh backscatter and reflection-induced crosstalk degrade signal-to-noise ratios. APC connectors are color-coded green per TIA-598 to prevent accidental mating with UPC (blue) infrastructure, which would cause immediate endface damage and permanent insertion loss. The F9UYBZRNNSNM015 ships with dust caps installed on all 12 duplex LC ports; these should remain in place until the moment of connection to prevent airborne particulate contamination of the polished ferrule endfaces.

The 24-fiber count maps to 12 duplex LC ports, providing 12 independent full-duplex 10G, 40G, or 100G links in a single-cassette footprint. For datacenter spine-leaf architectures, this density allows a single 1U FlexCore chassis (holding up to four cassettes) to terminate 48 duplex links (96 fibers) between a top-of-rack switch and core aggregation switches on different floors or buildings. The unterminated tail side uses tight-buffered 900µm color-coded fibers organized in a fanout furcation tube, simplifying identification during fusion splicing. Typical deployment: the cassette installs in a FlexCore chassis mounted in the datacenter server row; the 15-meter tail routes through overhead cable tray to a wall-mounted splice enclosure where it splices to a 24-fiber backbone trunk running to the building MDF or campus fiber ring. This architecture centralizes active equipment (switches, media converters) in the row while keeping splice points accessible in a separate enclosure that can be serviced without entering the live server environment.

OS2 singlemode fiber (9/125µm) is the long-distance, high-bandwidth standard for datacenter interconnects and campus backbone links. Unlike OM3/OM4 multimode fiber, which is limited to 300-400 meters at 10G and requires costly parallel optics (MPO) for 40G/100G, OS2 singlemode supports 10GBASE-LR, 40GBASE-LR4, and 100GBASE-LR4 optics across 10-kilometer spans using a single fiber pair per link. This makes the F9UYBZRNNSNM015 the correct choice for inter-building links, datacenter-to-datacenter disaster recovery connections, or any scenario where future bandwidth growth (400G, 800G) must be supported without re-cabling. The cable jacket is rated LSZH (Low Smoke Zero Halogen) with Euroclass B2ca flame propagation performance, meeting EN 50575 CPR (Construction Products Regulation) requirements for permanent installation in European buildings. B2ca indicates limited flame spread, low smoke opacity, and no corrosive halogen gases during combustion — a requirement in occupied spaces, transportation tunnels, and any installation where evacuation time is a life-safety concern. US installations should verify local adoption of LSZH requirements (increasingly common in healthcare, education, and government facilities) or use plenum-rated alternatives where NEC Article 770 applies.

The cassette housing is molded from black polycarbonate with integrated strain relief boots at both the LC connector end and the unterminated tail exit. Laser-etched port numbering (1-12 for each duplex LC) is permanent and solvent-resistant, eliminating the label-fade and adhesive-residue problems common with paper or vinyl port labels after 5-10 years in service. The cassette dimensions (11.53" W × 0.46" H × depth varies) conform to Panduit's FlexCore universal mounting standard, ensuring compatibility with FlexCore 1U, 2U, and 4U chassis across multiple product generations. Installation requires no tools: slide the cassette into an open slot until the latch clicks, then route the 15-meter tail through the rear cable manager and secure with the provided velcro strap. Removal reverses the process — depress the release latch, slide the cassette forward, and disconnect the tail at the splice point. This tool-free design reduces mean time to repair (MTTR) during emergency fiber cuts or port failures, and allows non-specialized datacenter techs to perform adds and moves without escalating to fiber-certified contractors.

Compliance with ISO/IEC 11801 (generic cabling for customer premises), ANSI/TIA-568-C.3 (optical fiber cabling components), and TIA-604-5/10 (FOCIS-5 and FOCIS-10 connector intermateability standards) ensures that this cassette assembly will interoperate with any standards-compliant LC transceiver, patch cord, or test equipment from any vendor. RoHS 2002/95/EC conformance indicates that the assembly contains no lead, mercury, hexavalent chromium, or other restricted substances above the EU thresholds, satisfying procurement requirements for government and multinational enterprise projects. The product ships in a single unit package (no carton quantity, indicating individual sale rather than bulk packs) with a protective foam insert that prevents connector endface contact during shipment. Upon receipt, verify that all dust caps are intact and that the cassette label matches the ordered part number and fiber count before removing the assembly from the anti-static bag. Store unused cassettes in a climate-controlled environment (15-30°C, <60% RH) to prevent hydrolysis of the fiber cladding or UV degradation of the LSZH jacket.