Digital input modules record 24 V DC or 230 V AC signals in the plant and forward them to the control. Switches and 2, 3 or 4-wire proximity switches can be connected.

35 mm wide input modules have settable parameters and diagnostic functions and can thus be adapted flexibly to the respective process requirements.

Low cost 25 mm wide input modules do not have settable parameters or diagnostic functions and are therefore very easy to integrate into the engineering. They are recommended for use in locations where only very few input channels are necessary or under conditions of use in which a high number of channels must be implemented in a very limited space.

Both module types can be used side by side in one station as required. Uniform features and shared system accessories guarantee easy handling.

The following digital input modules with a width of 35 mm are available:

• DI 16x24VDC HF;
  digital input module with 16 channels for recording 24 V AC signals; one potential group; input delay 0.05 ... 20 ms; input type 3 (IEC 61131); parameterizable diagnostic and process alarms; option of using two channels for simple counter functions up to 1 kHz
• DI 16x24VDC HF;
  digital input module with 32 channels for recording 24 V AC signals; two potential groups; input delay 0.05 ... 20 ms; input type 3 (IEC 61131); parameterizable diagnostic and process alarms; option of using two channels for simple counter functions up to 1 kHz
• DI 16x24VDC SRC BA;
  digital input module with 16 channels for recording 24 V DC signals; active low; one potential group; fixed input delay 3.2 ms; input type 3 (IEC 61131)
• DI 16x230VAC BA;
  digital input module with 16 channels for recording 230 V AC signals; four potential groups; input delay 20 ms; input type 1 (IEC 61131)
• DI 16x24...125VUC HF;
  digital input module with 16 channels for recording 24 ... 125 V UC signals; 16 potential groups; input delay 0.05 ... 20 ms (DC) or 20 ms specified for (AC); parameterizable diagnostic and process alarms

The following digital input modules with a width of 25 mm are available:

• DI 16x24VDC BA;
  digital input module with 16 channels for recording 24 V DC signals; sinking input; one potential group; fixed input delay 3.2 ms; input type 3 (IEC 61131)
• DI 32x24VDC BA;
  digital input module with 32 channels for recording 24 V DC signals; sinking input; one potential group; fixed input delay 3.2 ms; input type 3 (IEC 61131)