Buffer Mode; Backup Mode - Bosch BAT 490 Originalbetriebsanleitung

en 22 | BA� 4�� | Operation
4.5

Buffer mode

In Buffer mode, the BAT 490 maintains the battery
charge if electrical equipment has to be powered with
the engine stopped. The output voltage of the BAT 490
is a smooth DC voltage and is therefore suitable for
supplying the vehicle electrical system with the vehicle
battery.
i
The charger only establishes supply to the charging
clips once correct battery voltage polarity has been
detected.
1. Connect the red charging clip to the positive post (+)
of the battery.
2. Connect the black charging clip to the negative
post (‒) of the battery.
3. Switch on the BAT 490 by way of the on/off switch
(Fig. 2, Pos. 1).
 The red LED (Fig. 1, Pos. 3) lights.
4. Press .
 The battery voltage is displayed for three seconds
and the "Modes" menu then appears.
5. Select "Buffer mode" with
6. Press .
 The yellow LED lights (Fig. 1, Pos. 5).
 The battery is buffered.
13,47V 65,0A
1
Buffer mode
2
13,5V
Fig. 9: Buffer mode
1 Voltage and current actual values
2 Information on mode and parameter settings selected
!
Buffer mode is terminated on disconnecting the
charging clips.
i
The parameter settings are configured in the "Para-
meters" menu (refer to Section 5.1).
7. Buffer mode is stopped with
 The yellow LED is off.
 The "Modes" menu is displayed.
8. Switch off the BAT 490 on completion of Buffer mode.
9. Remove the charging clips from the battery.
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1 689 989 068 2012-10-30
or .
max. 90A
.
4.6

Backup mode

In backup mode, the BAT 490 can power the electrical
equipment in a vehicle in place of a battery. Backup
mode can be used for example to maintain a supply of
power to the electrical equipment in a vehicle when
changing a battery. The output voltage of the BAT 490
is a smooth DC voltage and is therefore suitable for
backup of the vehicle electrical system even without
a vehicle battery.
i
The charger only establishes supply to the charging
clips once correct battery voltage polarity has been
detected.
1. Connect the red charging clip to the positive post (+)
of the battery.
2. Connect the black charging clip to the negative
post (‒) of the battery.
3. Switch on the BAT 490 by way of the on/off switch
(Fig. 2, Pos. 1).
 The red LED (Fig. 1, Pos. 3) lights.
4. Press .
 The battery voltage is displayed for three seconds
and the "Modes" menu then appears.
5. Select "Backup mode" with
6. Press .
 The yellow LED flashes (Fig. 1, Pos. 5).
 Backup is provided for the vehicle power supply.
The vehicle battery can be replaced.
12,00V
1
Backup mode
2
12,0V
Fig. 10: Backup mode
1 Voltage and current actual values
2 Information on mode and parameter settings selected
!
In this mode, voltage is still present at the charging
clips even after the charging clips are disconnected.
i
The parameter settings are configured in the "Para-
meters" menu (refer to Section 5.1).
7. Backup mode is stopped with
 The yellow LED is off.
 The "Modes" menu is displayed.
8. Switch off the BAT 490 on completion of Backup
mode.
9. Remove the charging clips from the battery.
or .
6,5A
max. 10A
.
Robert Bosch GmbH