Siemens SIMATIC IOT2050 Operating Instructions Manual page 40

Maintaining and repairing the device
6.3 Replacing the backup battery (For 6ES7647-0BA00-1YA2 only)
Procedure
40
Remove the power plug and
marked screws.
Loosen the top housing. Care-
fully press with the blade of a
flat-blade screwdriver in the
marked recesses and carefully
pull on the appropriate place
on the top housing of the en-
closure.
Remove the top housing of the
enclosure.
Remove the marked screws
on the motherboard.
Operating Instructions, 03/2020, A5E39456816-AA
SIMATIC IOT2050