ABB BCU-02, Hardware Manual

Page: 22 / 34

22 Maintenance
Replacing the memory unit
WARNING! Do not remove or install the memory unit when the control unit is
powered.
See B in figure Replacement illustration (page 23) .
1. Remove the screw.
2. Pull out the old memory unit.
3. Insert the new memory unit.
4. Install the screw.
Replacing the SD/SDHC memory card
Do not remove the SD card while the yellow WRITE LED is on. Writing to the SD card is in
progress. For the replacement card type, see the technical data.
See C in figure Replacement illustration (page 23) .
1. Remove the screw and the clip covering the memory card.
2. Push the card to remove it.
3. Install the new card in reverse order.
Replacing the control unit
See section Installing the control unit (page 17) .
1. If the control unit is attached to the rail with screws or end brackets, remove them.
2. Remove the control unit from the rail.
3. Remove the latches from the back of the control unit.
4. Pull out the detachable terminal blocks that have control cables connected.
5. Install the new control unit in reverse order.
If there is a safety circuit connected to the STO terminals (XSTO) of the control unit, do the
acceptance test of the safety function after replacing the control unit. See the drive or
inverter module hardware manual, safety option user’s manual, and/or the related FSO
safety functions module user’s manual.