Tendzone TYCHO T 1212/CA - Manual (Page 20)

When Scene 6 of the matrix is loaded, PIN 3 outputs low level (< 0.7 V); and when scenes other than Scene 6 are loaded,
PIN 3 outputs high level (> 4 V).
1.3 Wiring Method of Input RI 1~8
Example 1:
In the above chart, connecting switch of PIN-16 (RI 1) (inputs low level) is closed;
The settings are as follows when Scene Setting of RI 1 is selected on the PC interface: the matrix will load Scene 4
automatically if the level of the pin corresponding to RI 1 is “Falling Edge”.