Connecting A Sensor / Final Controlling Element To The Cfu - Siemens Simatic CFU Commissioning Manual

Connecting
7.4 Connecting the device to the CFU PA (PROFIBUS PA field device, sensor, actuator)
7.4.2

Connecting a sensor / final controlling element to the CFU

Read section "Use in hazardous areas (Page 24)" if needed.
The CFU offers freely configurable channels (DIQ; DIQ<n>). You can connect a sensor or an
actuator to each freely configurable channel of the CFU.
● You can find information on the terminal pin assignment in the section "Terminal assignment
of the CFU PA (Page 146)".
● You can find information on the tightening torques in section "Tools and tightening
torques (Page 149)".
Terminals for the freely configurable channels (DIQ<n> for one sensor or actuator each)
Plug with screw-type terminals
Wiring
Current carrying capacity of the CFU
Observe the total maximum permissible load current of all channels together (total current Us
+DQ) and temperature-dependent limits.
You can find information about this in section "Rules for the operation (Page 21)".
Parallel connection not permitted
● Parallel connection of sensor supplies is not permitted.
● Parallel connection of digital outputs is not permitted.
Sensor supply
● An external power supply to a DI sensor supply or to a DO output is not permitted. This
You can find additional information in the following sections:
● Section "Technical specifications of the Compact Field Unit PA (Page 138)"
● Section "Configuring freely configurable channels (parameter overview - DIQ) (Page 78)"
42
CAUTION
error is recognized by the CFU during run-up or during re-parameterization and triggers
a diagnostic interrupt. All freely configurable channels are disabled until the error has been
remedied.
Plug with push-in terminals
Commissioning Manual, 07/2018, A5E39252870-AC
SIMATIC CFU