Siemens PPU 26x.3 series Manual page 21

Front of PPU version 290.3
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PPU and components
Manual, 10/2015, 6FC5397-2DP40-5BA3
USB interface
X127 Ethernet interface (service connection)
Qwerty keyboard
Control keys
Cursor keys
Keys to quickly select the operating area
Control keys
Numerical keys
System description
2.2 PPU versions
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