06.03
2.12 I/O Module PP72/48
2-100
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
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Electrical specification of the digital outputs:
Table 2-21
Electrical specification of the digital outputs
Digital outputs
min.
typical
max.
nominal
Voltage at high level (V
hi)
V
CC
– 3V
1)
V
CC
24V
Output current I
OUT
–
–
500mA
–
Voltage at low level (V
lo)
–
–
–
Output
open
Leakage current at low level
–
50
m
A
400
m
A
–
Signal delay time T
PHL
2)
–
0.5msec
–
–
Max. switching frequency
2)
Ohmic load
100Hz
–
–
–
Inductive load
2Hz
–
–
–
Lamp
11Hz
–
–
–
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Power supply of the digital outputs
1) typical output voltage:
V
CC
– I
OUT
<
R
ON
V
CC
:
Current operating voltage
Max. output current I
OUT
:
250mA for a simultaneity factor of 100%
500mA for a simultaneity factor of 50%
Max. short-circuit current:
4A (max. 100
m
sec, V
CC
= 24V)
Internal resistance R
ON
:
0.4
W
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2)
Moreover, the PROFIBUS communication time and the application cycle time must
be taken into account.
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Incorrect polarization causes neither high level nor destruction of the outputs.
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General electrical properties
–
Galvanic isolation using optocouplers
–
Current limitation to max. 500mA
–
Protection from: short-circuit, overtemperature, and loss of ground
–
Autom. shutdown on undervoltage.
2 Hardware Descriptions
