6. Disconnect the grounding conductor from the control unit.
7. Remove the latches from the back of the control unit.
8. Install the new control unit. Refer to section Installing the control unit onto a DIN
rail (page 16).
9. Connect the control cables to the new control unit.
10. Connect the fiber optic cables to the new control unit.
11. Move the memory unit from the old control to the new control unit. Refer to section
Replacing the memory unit (page 26).
If there is a safety circuit connected to the XSTO terminals of the control unit, do the
validation test of the safety function after you replace the control unit. Refer to the
drive or inverter module hardware manual, safety option user’s manual, and/or the
related FSO safety functions module user’s manual.
28 Maintenance