08/2004
WRS
System Guide
1 3
W R S C O M P O N E N T S
Wireless Main Unit 3 (WMU-3)
The Wireless Main Unit is the heart of the ARRI Wireless Remote System. It accepts
the hand controllers for focus and iris (WFU-1, WFU-3), zoom (WZU-1, WZU-3),
camera remote control (WRC-1), the Lens Data Display for Focus Puller (LDD-FP)
and it communicates with the camera. Up to three Wireless Main Units can talk to one
camera at the same time.
The WMU-3 is small in size and lightweight, making it easy to hold for long periods of
time. In addition, the new radio modem has a more robust transmission and less power
consumption than its predecessor. An ergonomic hand strap assures that the whole unit
stays safely in the assistant’s hand.
Unique to the WMU-3 are the abilities to accept the Lens Data Display for Focus
Puller (LDD-FP) and to accept two control units at once using the Wireless Expansion
Bracket (WEB-3). It is possible, for instance, to use the Lens Data Display for Focus
Puller (LDD-FP) together with a Wireless Focus Unit (WFU-1 or WFU-3).
Another possible combination is the Wireless Remote Control (WRC-1) with a
Wireless Focus Unit (WFU-1 or WFU-3). By employing two Wireless Main Units
WMU-3, it is possible to have focus, zoom, iris, camera remote control and the LDD-
FP all at the same time.
Compatibility: The WMU-3 communicates with URM-2, URM-3, Studio LDB-2 and
Lite LDB-2. As power supply the Wireless Battery Unit WBU-3 has to be used; WBU-1
and WBU-2 cannot be used. The WRC-1 needs to run at least software version 1.08.
When using the WMU-3 with the Wireless Remote Control (WRC-1) or the Lens
Data Display for Focus Puller (LDD-FP), neither WZU-1 nor WZU-3 should be atta-
ched between the units. LDD-FP and WRC-1 cannot be used on one WMU-3 at the
same time. Neither can two WRC-1 or two LDD-FP units.
K2.52240.0
Wireless Main Unit 3
Wireless Battery Unit 3 (WBU-3)
This Lithium-ion battery for the WMU-3 provides long running time and a battery
capacity display. If the WMU-3 is used solely with a WFU-1 or WFU-3, the battery
will last up to 16 hours.
Compatibility: This battery is not compatible with the WMU-1 or WMU-2, and
should be charged only with the Wireless Accumulator Charger 3 (WAC-3).
K2.52238.0
Wireless Battery Unit 3
Wireless Accumulator Charger 3 (WAC-3)
Battery charger for the WBU-3 Lithium-ion battery.
Compatibility: For use with WBU-3 only.
K2.52266.0
Wireless Accumulator Charger 3
Wireless Main Unit 3 (WMU-3) | front
Wireless Main Unit 3 (WMU-3) | back
Wireless Battery Unit 3 (WBU-3)
Wireless Accumulator Charger 3 (WAC-3)
