Siemens S5-155U System Manual page 112

Power Supply Units
Rechargeable battery and
battery monitoring
Causes
Recharge- Battery or external
able battery supply
In order In order
Faulty In order
In order Faulty
Faulty Faulty
Not In order
monitored
Not Faulty
monitored
Not Not
monitored monitored
4 - 42
The following table contains several examples.
Relay
Jumpers Battery
Warning
MA-NA closed
MN-NN closed
MB-NB open
MA-NA closed Active
MN-NN closed
MB-NB open
MA-NA closed Active
MN-NN closed
MB-NB open
MA-NA closed Active
MN-NN closed
MB-NB open
MA-NA open
MN-NN closed
MB-NB open
MA-NA open Active
MN-NN closed
MB-NB open
MA-NA irrelevant
MN-NN open
MB-NB open
Note:
Jumper MB - NB open: when line voltage returns the signal /BAU
(battery failure) is activated by a corresponding error.
Jumper MB - NB closed: when line voltage returns and during
operation the signal /BAU (battery failure) is activated by a
corresponding error.
LED Indication
RB MB
- Dark Dark
Lit Dark
Dark Lit
Lit Lit
- Dark Dark
Dark Lit
- Dark Dark
System Manual
C79000-B8576-C199-03
/BAU
Inactive
Inactive
Inactive
Active
Inactive
Active
Inactive