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ARRI UMC-4 Universal Motor Controller

Abel Code: AR-K2.0002058
Mfr. Code: K2.0002058
Estimated to Ship – Contact Sales for Availability
The Universal Motor Controller UMC-4 controls focus, iris and zoom on any camera and provides vital lens data for set and VFX postproduction.
Key Highlights
  • 3-Axis/Channel motor controller
  • Focus, Iris, Zoom control
  • LDS Lens Data Archive incorporated


The ARRI UMC-4 Universal Motor Controller is an advanced 3-axis motor controller. Up to three different hand units can connect to the UMC-4 at the same time, controlling focus, iris and zoom on any camera. The intuitive user interface helps to quickly setup the system and makes it easy to use. The high-quality outdoor antenna offers improved durability and reliable radio connectivity.

Lens Data

The UMC-4 incorporates the LDS Lens Data Archive and generates frame-accurate lens data with any lens. Lens data is used for lens mapping to pre-marked focus rings and depth-of-field display on the WCU-4 hand unit. It also enables focus tracking (setting the focus motor to continuously follow a subject by using an ultrasonic distance measurer). For VFX tasks in post, the UMC-4 records lens data with timecode, helping match the virtual lens to the recorded image. With the SUP 2.0 firmware update, wireless lens file transfer is now enabled.


The UMC-4 supports internal and external timecode that is recorded with frame-accurate lens data onto SD card, making the lens data usable for postproduction. The internal timecode clock can be jam-synced from external devices, but can output LTC timecode as well.

Multiple Interfaces

The UMC-4 includes multiple interfaces for maximum flexibility on set. Two serial interfaces connect peripheral equipment such as ARRI’s UDM-1 distance measure or motion control systems. Optional connector modules interface directly with focus and zoom demands from Fujifilm and Canon. An Ethernet connector integrates the UMC-4 with standard IT equipment, allowing Ethernet-based system control and remote access to the lens data files on SD card.

Exceptional Quality and Service

The UMC-4 is splash-proof and embodies the reliability and durability for which ARRI is famous. The worldwide ARRI Service network ensures rapid second level support if needed. New firmware versions can be installed to the unit via SD card within seconds.

New Features with SUP 2.0:

  • Wireless lens file transfer
  • Full playback control
  • User setups
  • Camera status display for PLAY and ERASE
  • Support of Teeth Detection
  • Updated LDA
  • LBUS support of cmotion cfinder III
  • Improvements on motor driving behavior
  • Several minor improvements
  • Several bug fixes

Compatible with:

  • Wireless Compact Unit WCU-4
  • Single Axis Unit SXU-1
  • Zoom Main Unit ZMU-3A
  • Wireless Zoom Extension WZE-3
  • Controlled Lens Motor CLM-2
  • Controlled Lens Motor CLM-3
  • Controlled Lens Motor CLM-4
  • Lens Data Encoder LDE-1
  • Ultrasonic Distance Measure UDM-1
  • All ALEXA camera models
  • All AMIRA camera models
  • All other cameras

Radio System Channel Frequencies:

  • 2.410 GHZ
  • 2.415 GHZ
  • 2.430 GHZ
  • 2.435 GHZ
  • 2.450 GHZ
  • 2.455 GHZ
  • 2.470 GHZ
  • 2.475 GHZ

NOTE: White radio and legacy yellow radio cannot be mixed in the same radio network of camera and hand units. It is possible to use both systems in parallel within different radio networks.


Software Update:

ARRI has released Software Update Package (SUP) 2.1 for the Universal Motor Controller UMC-4. This release adds (6) additional radio channels to choose from and supports the override function of the Operator Control Unit OCU-1. ARRI highly recommends updating the UMC-4 to this software update package. Devices delivered from ARRI Austria from now onwards include SUP 2.1 (until superseded by future updates). 

This SUP adds the following new features and changes:

  • 6 additional radio channels: The UMC-4 now offers 14 (0-13) instead of 8 radio channels to choose from (those additional channels are currently supported by the ALEXA LF camera and the cforce mini RF motor).
  • This software update supports the override function triggered by the Operator Control OCU-1 or the Master Grips (SUP 2.0)
    • The override function enables operators to override and return focus, iris or zoom at the touch of a button
  • Lens Files for Signature Primes in LDA: The UMC-4 Lens Data Archive now includes the category "ARRI Signature Primes", containing all lens files for Signature Primes
  • cforce mini RF support
  • Several minor improvements and bugfixes

What's in the Box

  • ARRI UMC-4 Universal Motor Controller
  • K2.0001967 - L-Bracket
  • K2.0002007 - Outdoor Antenna (Straight)
  • K2.0002046 - UMC-4 connector module with two serial connectors


Key Highlights

  • 3-Axis/Channel motor controller
  • Focus, Iris, Zoom control
  • LDS Lens Data Archive incorporated


Input Connector/Port:
2 x Serial - Fischer 7-pin
1 x LEMO 5-pin - Timecode
1 x Fischer 5-pin - LCS
1 x Fischer 16-pin - CAM
3 x Fischer 12-pin - Motor Connector (Focus, Iris, Zoom)
1 x Fischer 3-pin - RS In


Power Input:
DC - 9.5V to 34V DC (full motor speed)


11 in
15 in
11 in
4.44 lb
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