o Can you use a Saturn Switch with an SAIX12?
The buttons on the Saturn switch do not reveal their state (whether on or off)
– the button looks the same in both states.

So an SAIX12 can be wired to it. The switch is an alternate mechanism
switch, but the SAIX12 is designed to be able to toggle its state when the
button’s state changes. The operation:
if the switch is pressed to put it in the ON position, the SAIX12 would turn the light on
if an X10-OFF command is then sent through the mains, the SAIX12
would turn the light off
if the switch is then pressed to put it in the OFF position, the SAIX12
would know to turn the light on
The Saturn switch also supports a blue illuminated ring around the buttons’
edge. But luckily the wiring for this is separate from the switch mechanism.
So the active lead can just be connected to the output of the SAIX12,
and the neutral lead to neutral. Then the ring will always match the actual state of the light.
The downside here? - SAIX12s do not support dim commands, as
they are primarily designed for appliances.
Can you use a Saturn Switch with an DAIX12?
A DAIX12 cannot be wired directly to a Saturn switch because a DAIX12
only supports momentary switches, and the Saturn switches are only alternate
toggle switches. However, an IMX10 Controller can be used as an interface
between the two! Simply connect an IMX10 to the Saturn switch and programme
it for toggle mode. The DAIX12 won’t actually be wired to any switch… just the light.
The operation:
if the switch is pressed to put it in the ON position, the IMX10 sends an ON command
to the DAIX12, which causes it to turn the light on
if an X10-OFF command was sent through the mains, the DAIX12 would turn the light off.
but most importantly, the IMX10 will also detect this and realise the light is now OFF
X10 bright/dim commands can also be sent through the mains, which the DAIX12
will respond to.
if the switch was then pressed to put it in the OFF position, the IMX10 knew the
light was off, so it sends another ON command!
Once again, the illumination wires need to be connected to the DAIX12’s
output, not the IMX10.
So the solutions:
If you want a light to turn ON/OFF using a Saturn Switch, you can use an SAIX12
If you want a light to turn ON/OFF and support BRIGHT/DIM using a Saturn Switch,
you can use an DAIX12 combined a IMX10.
Now it may appear expensive to buy an IMX10 for each Saturn Switch, as well as a
DAIX12 for each light, but if you’re installing a 4-way Saturn Switch (to control 4 lights)
you only need 1 IMX10, as it can handle 4 switches!