Installing And Removing Expansion Boards; Removing And Installing The Device For Holding Down The Modules - Siemens SIMATIC Panel PC 870 Equipment Manual

4.3

Installing and removing expansion boards

Screws on the
slot sheet
Slots for expansion modules
Figure 4-8 Installing and removing expansion boards
Proceed as follows:
1. Open the housing as described in Section 3.1.
2. Remove all connectors from the board and note down their assignment.
3. Remove the device for holding down the modules as dsescribed in Section
4.3.1.
4. Loosen the screws on the slot sheet of the board.
5. Remove the board from the slot.
6. To install the new board, proceed in the reverse order.
4.3.1 Removing and installing the device for holding down the
modules
Use of devices for holding down the modules increases the resistance of the
modules to vibration. The device for holding down the modules is attached to the
system housing with a screw. It has three slits, through which the slide elements
are inserted.
Panel PC 870 Computing Unit Equipment Manual
Edition 12/01
Servicing and Expanding the Computing Unit
4-11