01/2007
2.11 I/O module PP72/48
2-83
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
Digital inputs
S 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
analogously.
PP72/48
X111, X222, X333
pin number:
2
26
4
3
:
:
:
:
P24OUT
(+24VDC)
:
:
:
:
M
1
P24OUText
ext. power supply
+24V stabilized
+24V
0V
1
Receiver
Receiver
Receiver
2
Fig. 2-21 Terminal assignment for the digital inputs
1
If you are using the internal power supply P24OUT
2 If you are using an external power supply P24OUT
ext
S 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 Section 2.11.3, Page 2-87
Caution
A max. current of I
out
= 0.5 A on X111, X222, X333: Pin 2 must not be
exceeded. An exceeding of the maximum current might destroy the module.
S External power supply (P24OUT
ext
)
If an external power supply is used for the digital inputs, its reference ground
must be connected with X111, X222, X333: Pin 1 (M).
X111, X222, X333: Pin 2 (P24OUT) then remains open.
For specification of the external power supply, see Subsection 2.11.3, Page
2-87.
2 Hardware Descri
tions
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