Siemens SINUMERIK ONE NCU 1740 Equipment Manual 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
Digital inputs
High-level voltage (U
Input current I
Low-level voltage (U
Signal delay time T
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 figure shows an example of the terminal assignment for the digital outputs on
connector X111. Connectors X222 and X333 are assigned analogously.
NCU 1740
Equipment Manual, 10/2021, A5E51087503B AA
Electrical specification of the digital inputs:
)
H
at V
IN H
)
L
PHL
:
:
:
:
1
(M)
Connectable components
min. max.
15 V 30 V
2 mA 15 mA
-3 V 5 V
0.5 ms 3 ms
12.2 PP 72/48D PN
Nominal
24 V
-
0 V
-
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