SB821 External Battery Unit Section 5 Maintenance
196 3BSE036351-510 A
7. Replace the cover, mount the unit onto the DIN rail, and reconnect the cable.
8. When power is re-established, check that the B(attery) LED lights up.
9. Dispose of the run-down Lithium battery in an approved manner.
Figure 65. SB821 External Battery Unit – Cover Removed
!
SB821 3.6 V Lithium Battery Unit
Note the warning
text on the battery.
X1
B– B+ SH