User guide

18 Power SupplyBAT Connector
8.2 BAT Connector
The BAT connector of ALEXA is a Fischer 2-pin socket located on the
bottom back of the camera right side.
The socket accepts power cables KC-20S and KC-29S. The cables can
either be connected to the mains unit NG 12/26R or to 24V Cine-style
batteries with three-pin XLR outputs.
Figure 4: BAT connector
8.3 Mains Unit NG 12/26 R
Use of the mains unit is recommended for shooting in the studio and
when using electronic accessories with high power consumption.
• First check that the correct mains voltage is set on the mains unit
(fuse on back of unit).
• Connect the mains unit to AC mains power.
• Ensure that the camera power is turned off.
• Set the voltage switch on the mains unit to 26 V.
Plug the battery cable KC-20S or KC-29S (spiral cable) into the power
supply socket on the camera and into the 26 V socket on the mains unit.
Note: The NG 12/24 R was the original design that provided 12 & 24
volts output – it was superseded by the NG 12/26 R, which outputs 12 &
26 volts. The NG 12/24 R can easily be upgraded to NG 12/26 R
specification at an ARRI service center.
8.4 Cine-Style Batteries
Any Cine-style battery with level of 24 V and a three-pin XLR out can be
used to power the camera through a KC-20S or a KC-29S.