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 Descriptions
