Please see my email sent in July, I have mentioned to use only S2/S3/S4 for your applications.
I estimate that either you activate S1 longer than CBFP setting time(100ms/150ms) so that activated HSO2 or one of the unit you use scheme 0a. I can’t recognize the difference if everything is exactly tested same.
“Hello Lim,
I have made my efforts on your these two applications today.
The maximum amount of sensor channels for each unit is still S2&S3&S4 (the same solution as "Emergency SB"). S1 sensor channel cannot send MT information through the HSO2 channel, which means that it cannot share the MT information to the rest two units. If you have AQ101 unit in your hands, you could get more light channels from it.
BTW, the burnt unit has been received and fixed today. Please arrange the pickup service soon.