① Front cover
② Menu back key
③ Alphabetic key group
④ Control key group
⑤ Hotkey group
⑥ Cursor key group
⑦ Numerical block
⑧ Menu forward key
⑨ 3/8" threads for additional components
⑩ Front cover
⑪ X127 Ethernet (service socket)
⑫ Status LED: RDY, NC, CF
⑬ X125 USB interface
⑭ Slot for CompactFlash card with user data
Figure 2-3 System versions
System description
2.3 PPU versions 26x.3 and 28x.3
PPU
Manual, 01/2014, 6FC5397-2DP40-3BA3 19