The following digital electronics modules can be used for connecting actuators/sensors in the context of SIMATIC PCS 7:

Digital input modules

• EM 8 DI DC 24 V High Feature
  • Digital electronics module with eight inputs
  • Suitable for standard switches and proximity switches (BEROs)
  • Rated input voltage 24 V DC
  • Diagnostics "Short-circuit of sensor supply to ground" per channel
  • Diagnostics "Open-circuit" per channel
  • Process alarm
  • Parameterizable input delay

Digital output modules

• EM 4 DO DC 24 V; 2  High Feature
  • Digital electronics module with four outputs
  • Suitable for solenoid valves, DC contactors and indicator lights
  • Output current 2 A per output
  • Rated load voltage 24 V DC
  • Diagnostics "Short-circuit of outputs to ground" per channel
  • Diagnostics "Short-circuit of outputs to P" per channel
  • Diagnostics "Open-circuit in outputs" per channel
  • Diagnostics "Load voltage missing" per module
  • Parameterizable substitute value