ST and Fibaro FGS-221 Double On/Off Relay Switch

[NHENRY]

You will find the dual switch device type below!

Fibaro Double On/Off Relay Switch 2x1.5kW FGS221 show up as 2 switches

FGS-221 Double Relay Switch is a multichannel device. It means that it has two independent executive circuits - each circuit is recognized by the FIBARO Home Center controller as a separate device. Accordingly, each channel is represented by an independent icon. The first channel is operated by a push-button connected to S1 terminal and it is the main (default) channel. The association of the second channel of the double relay switch may be operated only by devices supporting multi-channel association . Question: Does Samrtthings support multi-channel association .? if so how?