Siemens SIMATIC IOT2050 Operating Instructions Manual page 34

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5.3 Install Mini PCIe card
Installing the top housing
1. Align the bottom of the top housing to the heatsink edge. Make sure the marked hooks
hooked the heatsink. Carefully insert the COM interface into the top housing.
2. Insert the two plastic clips of top housing into the clip holes on heatsink.
3. Press the top housing to fix the clips.
Then install power plug and screws for COM interface.
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Operating Instructions, 03/2020, A5E39456816-AA
SIMATIC IOT2050