Match the signal circuit before the channel count
A PNP sensor supplies the input signal towards L+; a source-input module is intended for the corresponding NPN/M-reading arrangement. Confirm which circuit the exact model supports. The signal specification here is 24 V DC. Follow the exact channel assignment and potential-group arrangement in the module documentation.
Balance filtering and diagnostic requirements
Match input delay to the signal timing. Where wire-break or sensor-supply diagnostics are offered, configure them for the connected sensor and wiring; diagnostic capability alone does not mean every function is enabled in the project.
Wire-break detection with mechanical contacts
For this exact DI 8 ST module, the manual specifies a 25–45 kΩ resistor in parallel with each mechanical contact when wire-break detection is enabled. It is not required by that instruction when wire-break detection is disabled. Use the complete wiring diagram and sensor conditions before applying this arrangement.
Select the BaseUnit and potential group
Use type A0 as specified for this exact module. The light A0 BaseUnit starts a new potential group; the dark continuation type takes the group from the left. Choose AUX terminals or a potential-distribution arrangement to suit the actual sensor/actuator wiring.