ARRI ALEXA 35 Body & PL Mount Set (LBUS) - Manual (Page 9)

Camera Body Overview 9
4 Camera Body Overview
Camera Front
1 SERIAL Connector
2 LBUS Connector (on Lens Mount)
3 VF 1 Viewfinder Connector
4 Lens Mount (here: LPL Mount (LBUS))
5 LBUS Connector
SERIAL Connector (4-pin LEMO)
The SERIAL connector is used to connect distance measurement devices such as ARRI UDM-1, CE
CineTape Measure or Focus Bug directly to the camera and receives data from and provides power
to the distance measuring device. The SERIAL connector outputs regulated 12.0 V with a maximum
current of 200 mA.
VF 1 Viewfinder Connector (CoaXPress)
The camera uses an industrial CoaXPress interface with an ARRI custom connector to connect the
MVF-2 viewfinder with the camera. The interface transmits power, video and control data. The VF 1
connectors supports cable lengths of up to 5 m (16.4 ft). The VF connector supports hot plugging and
comes without a key, so the viewfinder cables plug in regardless of the connector's orientation.
LBUS Connector (4-pin LEMO)
Both LBUS connectors are used to connect daisy chainable LBUS devices of the ECS Electronic
Control System (lens motors, ARRI Master Grips, ARRI OCU-1, RIA-1...) to the camera and supply
regulated 24.0 V with a maximum current of 4.0 A.
ADVICE
Do not connect both LBUS ports (body and lens mount) of the ALEXA 35 in a daisy chain
and thus form a loop, you may experience problems such as the camera shutting down.