Siemens NCU 7x0.3 PN Series Manual page 129

Digital inputs
● Features:
● Terminal assignment for the digital inputs:
● Power supply for digital inputs (X111, X222, X333: Pin 2)
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
– X222: DI 3.0 to 3.7 are connected as rapid inputs.
– The inputs have no signaling (status LEDs).
– The inputs are not isolated.
– It is not possible to connect 2-wire BEROs.
The following figure shows an example of the terminal assignment for the digital inputs on
connector X111. Connectors X222 and X333 are assigned analogously.
①
when using the internal power supply P24OUT
②
when using the external power supply P24OUT
Figure 9-17 Terminal assignment for the digital inputs
– The internal power supply (P24OUT) is taken from the general power supply of
module X1, pin 2 (P24).
– Alternatively, an external power supply can be connected if the load at the digital
outputs becomes too high.
Connectable components
9.3 PP 72/48D 2/2A PN
ext
129