You can wire 2x PLVSWs per O5C20-MDW (or any Provolt sensor), however, you can also daisy-chain up to 4x additional PVLSWs to each of those switches (so technically up to 10 total). Newer Smart CMS Sensors are the same way, however, you can also use the new wireless companion dimmers too (up to 4x wireless companions per CMS sensor). Additionally, for the newer 2-zone (2-relay) CMS Sensors, you can independently control each of those 2x zones (relays).
