01/2007
2.11 I/O module PP72/48
2-85
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
Digital outputs
S 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.
Drivers
Drivers
Drivers
:
:
:
:
PP72/48
X111, X222, X333
pin number:
47,48,49,50
(DOCOMx)
M
31
1
(M)
:
:
:
:
Relays
ext. power supply
+24V stabilized
+24V 0V
32
46
Fig. 2-22 Terminal assignment for the digital outputs
S Connecting cable: The required connecting cables (ribbon cables) must be
provided by the user.
S Supply voltage:
To power the digital outputs, an external 24 V DC power supply source must
be connected to DOCOMx (X111, X222, X333: Pin 47, 48, 49, 50).
The reference ground of the external power supply source must be con-
nected to X111, X222, X333: Pin 1 (M).
For further data, see Subsection 2.11.3, Page 2-87.
Caution
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 1 A.
The power supply (+24 V DC) for the digital outputs must therefore be
connected to all 4 pins (X111, X222, X333: Pin 47, 48, 49, 50) for each
DOCOMx.
2 Hardware Descri
tions
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