Calrec Hydra2 EE5833-3 Modular Rack

Modular I/O boxes are 3U rack-mount
enclosures with 20 I/O card slots
that can be populated with a mixed
range of I/O cards, allowing for a
custom selection of I/O quantities
and formats.
Modular I/O boxes connect to a Hydra2
network in the same way as Fixed Format
I/O. Multiple modular I/O boxes can
coexist on a Hydra2 network alongside
fixed format I/O if required in order to
make up the total quantity of I/O in the
format and location it is needed.