Siemens simatic hmi op27 Equipment Manual page 160

4. Secure the AT expansion slot to the OP (Figure 18-2) using two of the four
Figure 18-2 Remove the side panel
5. Undo the three screws ¹ (see Figure 18-2) and remove the side panel.
6. Insert the AT cards carefully into the expansion slot so that the interface
Figure 18-3 Insert the AT Card and secure the side panel
OP27, OP37 Equipment Manual
Release 05/99
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screws enclosed ¸.
¸
sockets are positioned at the AT expansion slot interface cutout designed
for them. The fixing bracket of the AT card must be flush with the front
support for the side panel.
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18-3