Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
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
Fig. 2-31 Terminal assignment for the digital outputs
Connecting cable: The required connecting cables (ribbon cables) must be
provided by the user
To power the digital outputs, an external 24VDC power supply source must
be connected to DOCOMx (X111, X222, X333: Pins 47, 48, 49, 50).
The reference ground of the external power supply source must be con-
nected to X111, X222, X333: Pin 1 (GND).
For further data, see Subsection 2.12.3, page 2-101.
At the user end, it must be ensured that the maximum current drawn per
DOCOMx Pin (X111, X222, X333: Pins 47, 48, 49, 50) does not exceed 1A.
The power supply (+24VDC) for the digital outputs must therefore be con-
nected to all 4 pins (X111, X222, X333: Pin 47, 48, 49, 50) for each DOCOMx.
2 Hardware Descriptions
2.12 I/O Module PP72/48
Ext. power supply