Advantech IDK-1110WR-series User Manual page 23

Note3 In case of VDD = off level, please keep the level of input signal on the low or
keep a high impedance.
Note4 TP4 should be measured after the module has been fully discharged
between power off and on period.
Note5 Interface signal shall not be kept at high impedance when the power is on.
17 IDK-1110W User Manual