ABB AC 800F Mounting And Installation Instructions Manual page 239

6
Buffer battery
The 3.6 V lithium battery SB 808F, which is to be inserted in the battery holder
SY 809F is not included in the scope of delivery of the AUI module EI 812F and has to
be ordered separately.
The battery holder can be removed and plugged in at any time, while the module is
switched off or while it is running.
When the AC 800F is off, removing the battery holder when no module
with a buffer battery resides in the other E slot will cause a data loss.
The data in the main memory and the configuration of the real-time
clock will be lost then.
Replacing the buffer battery
• Remove the battery holder:
take the two small faces of the
holder and pull it out.
• If the AUI module is on (State
LED is lighted), the Battery
LED will light up red.
• Open
the
slightly press your fingers on
the upper and lower edge of
the holder.
• Replace battery SB 808F
• Observe the battery polarity
• Assemble the battery holder
• When inserting the battery
holder make sure the contact
pins are on the left hand side.
Functional Description of the Ethernet Modules
battery holder:
6-27