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24 en | Installation VideoJet X20
V3.5 | 2007.12 Installation and Operating Manual Bosch Security Systems
4.3.11 Backup Power Supply
When used in mobile vehicles (for example public transport), the VideoJet X20 is usually
switched on when the vehicle is started with the ignition key. If the ignition is switched off,
the power supply to the unit is also stopped. To keep the internal clock running when the
engine is off, you can connect the VideoJet X20 directly to the car battery via the BP and GND
contacts. The correct time is crucial for evaluating local recordings.
1. Connect the + (plus) line on the car battery to the BP terminal on the orange terminal
block.
2. Connect the – (minus) line on the car battery to the GND terminal on the orange terminal
block.
3. Now check that the connections are secure.
!
CAUTION!
Connect only batteries with the following specification: 10 to 30 V DC, 50 Ah max., 12/24 V
continuous flow.