With the Hi‑5 hand unit, ARRI introduced the fifth generation of its Electronic Control System (ECS). Now, the ZMU‑4 joins that ecosystem, sharing the Hi‑5’s swappable RF-EMIP, RF-2400, and RF-900 radio modules (coming soon), with different frequencies for different territories and shooting situations. Whichever radio module is chosen, it fits neatly into a recessed slot in the ZMU‑4 and becomes integral to the slimline form factor. There are no external radio boxes and no additional cables or setting up—just unplug from the camera and go.
ZMU-4 FAQ
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The ZMU‑4 is compatible with all cameras in its most basic configuration, with just one cforce lens motor and a power source. Further camera control is also available, depending on which camera you are using. See the configuration guides for more details here.
Compatibility
Products
ARRI cameras
- ALEXA 35
- ALEXA Mini
- ALEXA Mini LF
- ALEXA Plus cameras (Plus, XT, SXT, LF, 65)
- AMIRA
3rd party cameras
- RED cameras (e.g. RED Komodo, Raptor, Monstro, …)
- SONY cameras (e.g. Sony Venice, Venice 2)
- Canon cameras (e.g. Canon C300, C500, C700)
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The ZMU‑4 is hardwired compatible with 3rd party cameras by its CAM (7p) connector. Depending on the different setup following functions are supported:
- REC start/stop and tally
- User Buttons support
- F/I/Z control
Camera
Cable*
Supported Functions
Sony
(e.g. Venice & Venice 2)
Cable CAM (7p) - Sony Remote (8p)/D-Tap (0.8m/2.6ft)
(K2.0043084)
- REC start/stop, tally
- F/I/Z control
RED
(e.g. Komodo, Raptor)
Cable CAM (7p) – RED CTRL/D-Tap (0.6m/2ft)
(K2.0015758)
- REC start/stop, tally
- F/I/Z control
- User Buttons (DSMC2, Raptor only)
Canon
(e.g. C300, C500)
Cable CAM (7p) – LANC/D-Tap (0.6m/2ft)
(K2.0015757)
- REC start/stop, tally
- F/I/Z control
The ZMU‑4 is wirelessly compatible with 3rd party cameras by using the RIA‑1 or the cforce mini RF motor connected to the camera by its CAM (7p) interface. Please use the same cables as mentioned in the chart above *.
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Yes, you can connect the ZMU‑4 wirelessly with the cforce mini RF when equipped with the white-coded RF-EMIP Radio Module.
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The ZMU‑4 is wirelessly compatible with the following motor controllers when equipped with the white-coded RF-EMIP Radio Module.
- UMC-4
- AMC-1
- SMC-1
- EMC-1
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The ZMU‑4 is directly compatible via the LBUS interface with the following motors:
- cforce mini lens motor
- cforce mini RF lens motor
- cforce plus lens motor
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Yes, you can set limits as well a marker with one of the assignable ZMU‑4 user buttons.
Limits:
Limits allow you to define the range of motion of the lens motor. The joystick will function as normal, but the lens will not move beyond the near and far limit that you set with the Limit User Button Function.
Marker:
You can set one marker on the bar graph. The display will give visible feedback when getting close to and hitting your mark, similar to a traffic light system. To reset the marker, please hold down the Marker User Button.
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Yes, you can assign the ZMU‑4 to control other lens axis like Focus, Iris or AUX in the CONTROL menu.
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Yes, its possible to assign camera user buttons to the ZMU‑4 and control up to 3 camera user buttons. Following cameras are supported: ALEXA35, ALEXA Mini LF, ALEXA Mini, AMIRA, RED DSMC2, RED Raptor. The corresponding function of a user button must be set on the camera. Please check the designated camera user manual how to set the user buttons.
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It’s not possible to load a lens table in the ZMU‑4 via the USB-C interface. You can transfer one lens file with the Hi‑5 or WCU‑4 hand unit to the ZMU‑4. The ZMU‑4 will display the lens data (e.g. focal length).
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Yes, you can connect the ZMU‑4 via the LBUS interface hardwired to the Hi‑5 hand unit.
Important: In this configuration, the ZMU‑4 will act as the radio transmitter and the Hi‑5 radio will be disabled. -
The longest available cable length when connecting the ZMU‑4 hardwired via LBUS is 15m/49ft with the K2.0006756 Cable LBUS - LBUS (15m/49ft).
Suggested Kits and Accessories
Additional Radio Modules
Individual Components
Technical data
Joystick: | Force sensitive joystick |
Display: | Transflective TFT-LCD Display (readable in bright sunlight) 0.96“ diagonal |
Interfaces: | - 1x LBUS (LEMO 4pin) for lens motors, daisy chainable; supports LBUS protocol, LCS protocol (for ALEXA cameras) and EXT protocol (for AMIRA cameras) - 1x CAM (LEMO 7-pin) for camera control - 1x USB-C for software updates - 1x ARRI Radio Module Interface - 1x Battery Interface |
Mounting points: | 2x interfaces for ARRI Rossette |
Operating temperature: | -20° to +50°C -4° to +122°F |
Weight: | - 360 g / 0.79 lbs (ZMU‑4 body) - 476 g / 1.05 lbs (ZMU‑4 body with battery) - 526 g / 1.16 lbs (ZMU‑4 body with battery and RF-EMIP or RF-2400) - 556 G / 1.23 LBS (ZMU‑4 body with battery and RF-900) |
Power Supply: | Powered externally: - Power via LBUS interface - Power via CAM interface Powered by battery: - ARRI LBP-3500 battery pack - NP-F550 battery (Sony) or compatible batteries |
External Power Supply | 10.5 - 34 V DC |
Power Consumption Typ (W) | - 1 W (ZMU‑4 body) - 1.4 W (ZMU‑4 body with RF-EMIP) - 2.3 W (ZMU‑4 body with RF-2400) - 3 W (ZMU‑4 body with RF-900) |
Measurement (L x W x H) | - 66 x 43 x 215 mm / 2.6 x 1.69 x 8.46" (ZMU‑4 body) - 66 x 45 x 277 mm / 2.6 x 1.77 x 10.91" (ZMU‑4 body with RF-EMIP or RF-2400) - 66 x 45 x 414 mm / 2.6 x 1.77 x 16.3" (ZMU‑4 body with RF-900) |
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