Siemens SIMATIC IPC677E Operating Instructions Manual page 105

7. Remove the power supply, see also Replace power supply (Page 100).
8. Pull the bus board from the motherboard as shown in the figure.
Procedure - Installation
Note
Install only a bus board of the same type.
Proceed in reverse order.
SIMATIC IPC677E
Operating Instructions, 04/2019, A5E45117996-AA
Maintaining and servicing your device
7.4 Removing and installing hardware
105