Siemens Simatic 620 - Manual (Page 65)

SIMATIC Box PC 620 Expansions
4-5
SIMATIC Box PC 620 Manual
A5E00131465-01
4.1.3 Components Visible After Opening the Unit
Components
Once you have removed the top cover of your unit, the components are visible.
Power supply unit Floppy drive or LS 240
Processor Bus board Memory extension Fan
Figure 4-2 Box PC 620 Open