Power Supply; Power Management; Bat Connector - ARRI ALEXA Series User Manual

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7.1
7.2

Power Supply

Use only ARRI-recommended power supply solutions.
Manipulation of power supplies could result in serious injury or
death, or damage to the ALEXA.
The ALEXA accepts an input voltage range from 10.5 to 34 V DC. The
camera can be powered through the BAT connector or battery adapters
accepting V-Lock or Gold Mount batteries.
The power supply should deliver an output of more than 90 W to power
the camera sufficiently. The power draw of the camera in basic
configuration is about 85 W.
A 12 to 15 V battery should have at least 6 A maximum output current.
Note: when powering accessories through the camera, the total power draw of
the camera is increased by the amount of power drawn by the accessories.

Power Management

When using the BAT connector and one or more onboard battery
adapters simultaneously, the camera's power management system
ensures that the power source with the highest voltage level is used.
When the voltage level of one power source drops below the level of
the other, or a power source is disconnected from the camera, the
power management system automatically switches to the other power
source, avoiding shutdown of the camera.
For example, a 12 V onboard battery can be used as backup for the
main 24 V battery. Using a 12 V onboard battery in addition to the main
24 V battery also allows for quick switchover to handheld mode—the
power cable can simply be disconnected from the BAT connector.
When using two onboard battery adapters (with batteries in parallel—
one on top and one on the back), the camera will treat them as a single
source. When used this way, the load is spread across two batteries,
creating a strong power source.

BAT Connector

The BAT connector is the primary power input on the ALEXA. It is a
Fischer 2-pin socket located at the back of the camera on the camera-
right side.
Power Supply