markie83 wrote

a) Is it possible two connect both networks to the EAPs, having one SSID for the main network and another SSID for the other?

Sure. Multi-SSID is for situations like this.

b) Would it help if I get a OC200 controller? I see it has two ethernet ports. 

 

Not needed for Multi-SSID, but OC200 brings more features to your EAP than available in the EAP's web UI (e.g. hotspot portals, ACLs, few more settings depending on EAP model).

c) Is VLAN the keyword here? (I know very little about VLAN)

 

No and yes. Multi-SSID is what you need, but to isolate the two networks you use VLANs and assign each SSID to the corresponding VLAN.