Proface PS4800 - 19 Panel PC" - Manual (Page 128)

Hardware Modifications
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6 Remove the marked Torx screws (T10) and slot cover:
7 Insert the interface module in the slot and fasten it to the Industrial Personal
Computer with 2 Torx screws (T10):
NOTE: The recommended torque to tighten these screws is 0.5 Nm (4.5 lb-in).
8 Replace the cover plate. Secure the cover plate to the Industrial Personal
Computer using the Torx screws (T10) marked (1). The screws (2) only need to
be replaced if an interface module is mounted:
Step Action