System description
2.2 PPU versions
2.2
PPU versions
Front of the PPU 290.4
①
②
③
④
⑤
⑦
⑥
,
24
USB interface
X127 Ethernet interface (service connection)
Qwerty keyboard
Keys to quickly select the operating area
Cursor keypad
Numerical keys
⑧
Control keys
Software and hardware
Service Manual, 08/2018, 6FC5397-5DP40-6BA1