Proface PS4800 - 19 Panel PC" - Manual (Page 164)

Hardware Modifications
164
The table describes how to exchange a main memory card:
Step Action
1 Disconnect the power cord to the Industrial Personal Computer.
2 Touch the housing or ground connection (not the power supply) to discharge
any electrostatic charge from your body.
3 Remove the Industrial Personal Computer from the control cabinet and follow
the steps in Industrial Personal Computer Installation (see page 52) in reverse
order.
4 Place the Industrial Personal Computer on a clean and flat surface.
5 Remove the Torx screws (T20) marked in the following figure:
6 Slide the cover plate up to remove it:
7 The main memory card can now be exchanged. To do so, carefully press the
fastening clamps outward and pull out the main memory card.
NOTE: The lower main memory card can only be exchanged after the top one
has been removed.