This economical shelf unit from Blackmagic Design lets you mount up to 3 Teranex Mini units side by side in a single rack unit.
Teranex Minis can be rack mounted in combinations of one or more and you can take them out and use them non rack mounted whenever you need.
You get built in AC power and ethernet on every converter so there’s no single point of failure. Unlike card based converters, you can walk up and change settings from the front panel, monitor the video going through each converter, and you can also manage them remotely over ethernet. Because they’re so small you can mount them in the front or the rear of an equipment rack or road case.