The CL3-E Motor controller has 5-V inputs and if you want a 24-V control signal is to be applied, it will require a 57kohm (0.25W) resistor be connected in series to each input in use.
Note: For other controllers with switchable 5 or 24 V digital inputs you can select which voltage range you want with object 3240 sub-index 6
The motor controllers and Plug & Drive motors have open collector outputs. To switch a load or PLC, you require a relay according to this circuit diagram. The flyback diode is required. Please don't exceed the maximum switching current or the maximum voltage of the selected controller. You can find this information in the respective manual. SMCI35: A load/PLC cannot be connected with this controller.
Depending on the cable type, routing and length, an overcoupling onto the neighboring control line may occur with 24 V control signals. In motor controllers with wide range inputs (5–24V), this can cause a second input that is not activated to be recognized as high. To prevent this without having to change the wiring (which can be an time-consuming process), the following interference-suppression circuit can be provided at each input in use....