URSA Cine: 7-Pin EXT & 3-Pin Fischer Power Out Motor Systems

Hey. This is mainly a question for the Blackmagic Team. Which Motor Systems work with the 7-Pin EXT & 3-Pin Fischer Power Out?

I am using the 24V B-Mount Battery System. I'm using the CoreSWX Helix Max 275Wh in these tests.

I bought the Tilta Nucleus M 7-Pin EXT Cable and it doesn't power the motor. It will work for Run/Stop if I run the P-Tap Power into the Motor. However, that single 7-Pin EXT Cable is not powering the Motor like I was hoping. I'm debating doing an exchange at B&H for the 3-Pin Fischer, but there's no guarantee that will work either for powering the Motor.

So, the question becomes which Lens Motor Systems have been tested with the URSA Cine for getting power via these ports?
Arri, Preston, Teradek, Tilta, etc?

Want to take advantage of this feature. Sadly, it's not working as I had hoped.

[Tim Schumann]

On URSA Cine a 3-pin RS cable will work to send 24v power out (up to 2 amps) and receive run/stop from all standard follow focus systems (we have tested with c-motion, Preston, Arri Hi-5, RT motion, Tilta etc). This is standard wiring so should all just work normally.

The 7-pin EXT has the same pin configuration for power and for RS on pins 5-7 as the Alexa Mini's EXT port... it only differs in that pins 1-4 are for serial communication rather than CAN (LBUS). The power on this port is also 24v at up to 2 amps and is shared with the 3-pin RS. So the run/stop should work if it is wired to the correct pin but perhaps the Tilta cable you have is wired differently or for a different 'EXT'. We are working with multiple third party vendors to get full camera control working through this 7-pin connector but that is still a work in progress.

Worth noting that a standard ARRI EXT to RS cable will get you a second 3-pin RS from URSA Cine's EXT port as well so if you need to run two run / stops... say one from a focus motor and another from our URSA Cine Grips or a third party red run/stop button on a cable you can do both at once without a splitter.

Pin wiring and details for both connectors are in the URSA Cine manual. Hope this helps.

Thank you Tim! This is helpful information. I'll probably contact B&H to send back the cable I got in exchange for the 3-Pin Fischer then.

Hopefully you can work with Tilta for a new 7-Pin EXT Cable from them to work with the URSA Cine Port. Get it so that it works for all the features you want. Especially with that new Nucleus M II they just announced.

My hope is that I can upgrade to the Nucleus M II later this year and have all the benefits of lens mapping from the unit, but also the camera. Would love if you guys made it possible for communication for when a /i Technology lens is attached to the camera that the Tilta Nucleus M II FIZ recognizes which lens and pulls up that lens map. That would be a chef's kiss type of awesomeness.

[Tim Schumann]

Yes I believe many of the Tilta FIZ systems already do talk via Bluetooth for control to our cameras and you would need your wifi antennas on and to pair it for that to work well.

Wired from the 7 pin would be ideal.

What you are describing would require the lens to provide all of that information including minimum focus distance and all of the markings on the lens barrel too.

Some lenses with i/data do this and some do not.

Yes, the way I used to do Run/Stop without a cable with the URSA Mini Pro G2 was via the Bluetooth connection of the FIZ with the camera via the Bluetooth+ app. It worked pretty well most of the time. A wired cable option is always better.

I will be upgrading to the Nucleus M II later this year. Waiting for the FIZ only to start. Then I'll add the new motors in time. The main goal is to get that FIZ for the lens mapping. The current Mark 1 Motors are fine for now.

What you are describing would require the lens to provide all of that information including minimum focus distance and all of the markings on the lens barrel too.

Some lenses with i/data do this and some do not.

There is a reason I'm in this profession: I'm a dreamer. Seems my hopes and dreams are a bit ahead of where we're at technologically for this to be ideally ready with all lenses.

I got the traded out Tilta cable today. The 3-Pin Fischer worked perfectly for powering the motor from the port. Excellent!

Now, if only Tilta didn't make the cable so long. They certainly need a shorter version. Only one length option at moment.

Really love this feature of the URSA Cine.

Request: URSA Mini/PYXIS Pro 12K with the same Lemo Port at front for lens motors. Basically combine URSA Mini Pro and PYXIS together into a version with internal neutral density, V-Mount, Gold Mount, or B-Mount, and the front motor Lemo. Now the question is whether it should be 3-Pin Fischer or 7-Pin EXT.

If I had to choose one it would be the 3-Pin Fischer since I know that works. But if there's a guarantee that 7-Pin EXT will work because Blackmagic and Tilta worked out the cable issue for 7-Pin EXT with their Nucleus products then I'd vote for 7-Pin. But with the PYXIS Pro 12K or URSA Mini 12K it has to be one of the Lemo options. No Mini-XLR as that's useless compared to lens control with the smaller camera body.

Those are my current thoughts. Thank you! Really loving the URSA Cine either way.