hi,
not exactly,
to activate the 8 stations whit my previous setup, pcf8574, the pcf8574 send low “0V” to active the relay board.
and now the pca9555, it send high “5V” to activate my 8 channel relay.
so previously, pcf8574, wen a activate a station the relay activated and now 9ca9555 the relay is always activated except wen a start a station.
does that make scene?