Can I have a CE declaration for a Radleys Data Hub?

Yes, we can send the CE declaration to you.

How many RS232 devices can be controlled per Data Hub / AVA software instance?

The Data Hub is available with 2 or 4 RS232 ports. Up to 4 Data Hubs can be configured per AVA software instance. Therefore, you can have up to 16 RS232 devices (4 x 4) per instance of AVA. This is the maximum recommended number of devices for AVA; this is what we have tested up to.