Siemens SINUMERIK 840Di - Page 98

06.03
2.12 I/O Module PP72/48
2-98
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
For specification of the external power supply, see Subsection 2.12.3,
page 2-101.
S Connecting cable: The required connecting cables (ribbon cables) must be
provided by the user
S Electrical specification of the digital inputs:
Table 2-20 Electrical specification of the digital inputs
Digital outputs
min. typical max. nominal
Voltage at high level (V
hi)
15V
1)
30V 24V
Input current I
IN
at VU
hi
2mA – 15mA –
Voltage at low level (V
lo)
–30V – +5V 0V
Signal delay time T
PHL
2)
0.5msec – 3msec –
S Power supply of the digital inputs
1) typical output voltage: V
CC
– I
OUT
<R
ON
V
CC
: Current operating voltage (P24OUT) at X111,
X222, X333: Pin 2
Max. output current I
OUT
: 500mA per pin
Max. short-circuit current: 4A (max. 100msec, V
CC
= 24V)
Internal resistance R
ON
: 0.4W
S 2)
Moreover, the PROFIBUS communication time and the application cycle time must
be taken into account.
S Polarity reversal causes neither high level nor destruction of the inputs.
2 Hardware Descri
p
tions