Specifying engineer wants to know the input impedance of the voltage inputs on the MNL-10Rxx / 15Rxx / 20Rxx controllers. This information is not in the data sheet.
TAC I/A Series
Job specification requirement
The minimum input impedance for a MNL-10Rxx /-15Rxx / -20Rxx UI configured as a voltage type input is 20K ohms.