06.03
2.12 I/O Module PP72/48
2-102
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
Moreover, the external power supply voltages for the I/O modules PP72/48, the
digital outputs, and optionally the digital inputs must meet the specifications
according to Table 2-23.
Table 2-23 Specification of the power supply voltage P24OUT,
Voltage
minimum 20.4V
nominal 24V
max. 28.8V
minimum (dynamic) 18.5V
maximum (dynamic) 30.2V
Non-cyclic overvoltage
max. (absolute, transient) 35V
max. duration 500msecs
min. recovery time 50secs
max. events per h 10
Voltage failure for min. power supply voltage
max. duration
1)
50msecs
min. recovery time 1s
max. events per h 10
Power consumption
max. approx. 40W
On the module side the power supplies must be protected against:
S Polarity reversal
S Short-circuit (elec. current limitation of the outputs)
S Overload (fuse protection).
2.12.4 Grounding
The installation of the module must be performed acc. to EN 60204.
If a large-area, permanent metallic connection with the central ground point
through the rear panel is not possible, the mounting plate must be connected to
the grounding by means of a line (cross section >10mm
2
).
!
Caution
A protective conductor must be connected.
2 Hardware Descri
tions
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