In this instance I have a standard Clipsal switch (image below) connected to the first input of a Z41 (image below). The light that needs to be turned on and off is connected to a MAXinBOX 16 Plus. The setup would be very similar if I was using a TMD Plus 4 as (I believe) the inputs and group objects related to this are identical in both cases. As the mechanical switch itself displays the status of the switch no feedback is required. If the light is turned on or off by another means it is possible that the switch doesn't reflect the status of the light. However, if that status does occur then a simple physical process of toggling the physical twice should bring in back into synch.
Input Configuration
The parameter setup on the Z41 is very simple. As shown in the image all that is required is that we select 'Binary Input'. The Debounce Time was left as default.
Binary Input 1 Configuration
Switch/Sensor is selected, Rising Edge and Falling Edge are set as shown below and all other Parameters were left as default as shown. Note: the rising edge is the generated when the switch is closed and the falling edge is generated when the switch is opened. However, in both instances when set to "Switching 0/1" the Binary Input should be aware of the state of the Actuator Output and send the appropriate On or Off so that the physical light changes regardless of whether the Clipsal switch mechanism is turned on or off (closed or opened).
As a consequence of the previous Parameter settings several Group Objects become available as shown below. We will just make us of the single '[Switch Sensor] Edge' group object to turn the actuator on or off. This is shown in the following image.
In this instance we just link the Group Object from the Z41 (shown above) with the 'On/Off' group object of the MAXinBOX 16 Plus. These two linked group objects are shown in the following image.
After completing this setup I was able to turn the light on and off from the Clipsal switch. In this case it was an external light outside the laundry. See following image with light on.