Siemens PC 670 Wartungshandbuch Seite 146

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Hardware Information
6-30
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
DC port of the power supplies
The power supply has a cable connector (X2), through which all the signals on the
DC side are connected to the basic board. The port assignment shown is only a
draft. It will be defined during the development of the power supply and basic
board.
Pin No. Series A
Series B
Meaning
1 PwrGood Power Good signal
2 TTY VCC Floating VCC (15 V ± 3 V) for TTY port
3 TTY GND TTY chassis ground
4 NAU N Power failure, early warning signal
5 GND Chassis ground
6 P12V +12 V
7 V DC For processor module
8 N12V 12 V
9 GND Chassis ground
10 GND Chassis ground
11 P3V3 +3.3 V
12 P3V3 +3.3 V
13 GND Chassis ground
14 GND Chassis ground
15 GND Chassis ground
16 GND Chassis ground
17 P5V +5V
18 P5V +5V
19 P5V +5V
20 P5V +5V
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