HPE S0U68A 8-Port SFP+ 1G/10G LRM Network Expansion Module
Overview
The HPE Aruba Networking CX 5420 8p SFP+ 1G/10G LRM Module (S0U68A) is a modular line card designed to expand the port capacity of compatible HPE Aruba Networking CX 5420 series switches. It delivers eight SFP+ interfaces, each capable of operating at 1G or 10G speeds using Long Reach Multimode (LRM) optics — the right choice when you need flexible, high-density fiber uplinks without committing a fixed-port switch to a single speed tier.
Each of the eight ports is labeled as a 10GBase-X SFP+ slot, meaning you can populate them with LRM transceivers for runs over legacy OM1/OM2 multimode fiber that standard SR optics can't reliably cover. That matters in facilities where existing fiber plant predates modern SR standards — hospitals, older enterprise campuses, and multi-building security infrastructure where re-pulling cable isn't an option. Browse the full network switches and modules category to compare compatible chassis options.
Key Features
- 8x SFP+ Ports (1G/10G LRM): Eight independent interfaces running at either 1G or 10G give you speed-matching flexibility across mixed-generation infrastructure — pair slower access-tier feeds with 10G uplinks on the same module without needing a second card.
- Long Reach Multimode (LRM) Support: LRM optics extend reliable 10G operation over legacy OM1 and OM2 multimode fiber up to 220 meters — critical when your fiber plant was installed before OM3/OM4 became standard and replacement isn't in the budget.
- Modular Form Factor for the CX 5420 Chassis: As a dedicated expansion module, the S0U68A slots into the CX 5420's module bay, adding port density without requiring a separate switch — cleaner rack footprint, fewer management planes, one fewer power supply to budget for in a PoE switch planning discussion.
- 10GBase-X Interface Type: All eight ports conform to the 10GBase-X standard, preserving compatibility with a wide range of SFP+ transceiver types beyond LRM — useful if you anticipate migrating to OM3/OM4 or single-mode fiber in specific runs later without replacing the module.
- 689.5g Module Weight: At just under 700g, this module won't meaningfully shift chassis weight balance in a populated CX 5420 — relevant when calculating rack load limits in dense deployments.
Integration & Compatibility
The S0U68A is engineered specifically for the HPE Aruba CX 5420 switch chassis. It is not a standalone device — the CX 5420 chassis is a prerequisite. Before ordering, confirm your chassis revision and slot availability against HPE Aruba's current compatibility matrix, as module interoperability is chassis-generation specific. Transceiver selection is equally important: LRM modules require LRM-rated SFP+ transceivers (such as 10GBASE-LRM) and will not deliver rated performance with standard SR or LR optics. For network architects building out surveillance backbones or enterprise distribution layers that rely on legacy multimode runs, pairing this module with an appropriate SFP+ transceiver is the critical second step after procurement. Environmental operating data — including temperature range, humidity tolerance, and altitude ratings — is available in HPE Aruba's official datasheet for the CX 5420 platform.
Frequently Asked Questions
Q: What switch chassis is the HPE S0U68A compatible with?
A: The S0U68A is a module designed for the HPE Aruba Networking CX 5420 switch chassis. It is not compatible with other CX series chassis and requires an available module bay in the CX 5420 to install.
Q: How many ports does the S0U68A provide?
A: The S0U68A provides 8 SFP+ ports, each operating at 1G or 10G speeds using the 10GBase-X interface type with Long Reach Multimode (LRM) optics support.
Q: What fiber type does the S0U68A's LRM support work with?
A: LRM (Long Reach Multimode) optics are engineered for use over legacy OM1 and OM2 multimode fiber — the type commonly found in older enterprise and institutional facilities. Standard SR transceivers do not provide reliable 10G performance over these legacy fiber types at extended distances.
Q: Can I use standard SFP+ SR transceivers in the S0U68A ports?
A: The ports are SFP+ slots conforming to the 10GBase-X standard, so they can physically accept a range of SFP+ transceivers. However, this module is specifically rated for LRM optics; using SR or LR transceivers may work but should be validated against HPE Aruba's qualified transceiver list for the CX 5420 platform.
Q: Does the S0U68A require separate power?
A: As a module for the CX 5420 chassis, it draws power from the chassis. No separate power supply is required for the module itself.
The S0U68A earns its place in one specific scenario: you have a CX 5420 chassis and legacy multimode fiber runs that predate OM3. The eight 10GBase-X SFP+ ports in LRM configuration let you push 10G over that old glass without a fiber rip-and-replace — a real cost offset when you're connecting IDF closets in a building wired fifteen years ago.
Technical Highlights:
- 8x SFP+ at 1G/10G: Dual-speed support across all eight ports means you can mix slower uplinks from access-tier devices with full-rate 10G feeds on the same module — useful when the surveillance head-end and the storage array both terminate here.
- LRM Optic Compatibility: Long Reach Multimode is the only standard that reliably runs 10G over OM1/OM2 fiber. If your fiber plant is legacy multimode and you need 10G, this is the spec that makes it viable without new cable.
- 689.5g Module Mass: Light enough that chassis balance and rack load limits won't be a factor in standard deployments — one less variable when populating a dense IDF rack.
Deployment Considerations:
- This module is chassis-dependent — the CX 5420 is a prerequisite, and slot availability must be confirmed before ordering. It does not function as a standalone device.
- LRM performance is transceiver-dependent: only HPE Aruba-qualified 10GBASE-LRM transceivers are guaranteed to meet spec. Validate your transceiver selection against the current CX 5420 qualified optics list before procurement.
Where this module makes the most sense is a hospital or university campus IDF-to-core uplink scenario — legacy OM1/OM2 fiber plant, CX 5420 already in the rack, and a hard requirement for 10G to the distribution layer without a fiber upgrade project on the capital plan.
