Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
Terminal assignment for the digital inputs
The following figure shows an example of the terminal assignment for the
digital inputs on connector X111. Connectors X222 and X333 are assigned
Fig. 2-30 Terminal assignment for the digital inputs
If you are using the internal power supply P24OUT
If you are using an external power supply P24OUText
Internal power supply (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). Specifica-
tion: See Subsection 2.12.3, page 2-101.
A max. current of I
= 0.5A on X111, X222, X333: Pin 2 must not be ex-
ceeded. An exceeding of the maximum current might destroy the module.
External power supply (P24OUText)
If an external power supply Is used for the digital inputs, its reference ground
must be connected with X111, X222, X333: Pin 1 (GND).
X111, X222, X333: Pin 1 (P24OUT) then remains open.
2 Hardware Descriptions
2.12 I/O Module PP72/48