Siemens SINUMERIK ONE NCU 1740 - Page 123

Internal supply voltage (P24OUT)
The internal power supply for the digital inputs (X111, X222, X333: Pin 2) is derived from the
general power supply of module X1, pin 2 (P24).
Technical data
Table 12-24 Electrical speci󹪝cation of the digital inputs:
Digital inputs min. max. Nominal
High-level voltage (U
H
) 15 V 30 V 24 V
Input current I
IN
at V
H
2 mA 15 mA -
Low-level voltage (U
L
) -3 V 5 V 0 V
Signal delay time T
PHL
0.5 ms 3 ms -
Digital outputs
Characteristics
• No galvanic isolation.
• Protection against: Short-circuit, overtemperature, and loss of ground.
• Automatic disconnection in case of undervoltage.
Terminal assignment for the digital outputs
The following 󹪝gure shows an example of the terminal assignment for the digital outputs on
connector X111. Connectors X222 and X333 are assigned analogously.
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'ULYHU
'ULYHU
5HOD\
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9

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:
:
:
:
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
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1 (M)
0
Connectable components
12.2 PP 72/48D PN
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA 123