Digi International 76000528 4-Port Serial Expansion Module
Overview
The Digi 76000528 is a 4-port serial expansion module for the AccelePort XP/NEO product line, adding four additional serial connections to an existing host adapter for environments running multiple RS-232/RS-422/RS-485 devices off a single controller. It solves the port-density problem in server rooms and industrial control racks where more serial-attached equipment needs to come online than the base adapter supports, without swapping out the host card itself.
Compatibility
Designed specifically for the Digi AccelePort XP and AccelePort NEO host adapter series — confirm the specific host adapter model in your rack supports expansion before ordering, since port-expansion modules are matched to their host family rather than sold as universal add-ons.
Installation Notes
The module measures 10.6 x 7.8 x 2.1 in and weighs 0.9 lbs, sized to mount alongside its host adapter in a standard server rack or enclosure without requiring extra rack units beyond typical card clearance. Compact depth (2.1 in) keeps cable routing manageable in tight rack backplanes where serial cabling density is already high.
The module carries a 5-year manufacturer warranty, a meaningful factor for infrastructure hardware expected to stay in continuous service in network video recorders and industrial control deployments for years between refresh cycles. For broader planning on wiring these into a larger deployment, see the PoE and cabling planning guide. Pair it with managed network switches when consolidating serial-to-IP conversion at the rack level, and browse the full Digi International catalog for compatible host adapters and accessories.
