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Old 01-08-2021, 05:32 AM   #1 (permalink)
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Default S-Bus wiring advatages

Hi all

I never had a Futaba S-Bus system in the past. Wiring was always challenging using other conventional rc systems. Has anybody used the S-Bus wiring system in his heli? If so are there any real advantages? Are there any S Bus wiring pics available?

Many thanks in advance.

Kind regards

Yaya
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Old 01-08-2021, 05:56 AM   #2 (permalink)
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On pretty much all fbl controllers it takes a single wire from the sbus receiver to the fbl controller to carry all of the channels.

What I did using vbar (not NEO) is using an ESC with two outputs is run the main to the vbar ESC in and the secondary power to the receiver.

If the ESC you have only has a single output that will go to the ESC input/output on the fbl controller you are using. The receiver will get its power from the sbus socket on the fbl controller.
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Old 01-08-2021, 06:25 AM   #3 (permalink)
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Hi Andy

Thanks.

I had the idea to have only one wire from the fbl to the first servo and then from first servo to second servo etc. But this would probaby only possibe if the fbl supports s-bus in this sense.

KR

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Old 01-08-2021, 06:52 AM   #4 (permalink)
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On most models with 3 servos round the mast and the relative close proximity of the other controls it probably isn't necessary.

Futaba have a nice video showing a plane with 2 servos per control surface using s.bus hubs to connect everything up. That definitely reduces the amount of wiring considerably.
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Old 01-08-2021, 07:06 AM   #5 (permalink)
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i liked this video for easily showing the installation & programming of SBus setups: https://www.rcgroups.com/forums/show...Video-Tutorial

so it's more a squid (or multi-squid) than a ('daisy chain') bus installation... and the question if it would be a real advantage in a trainer heli should be answered easily plus the question on 'all that juice' for a 700 swash through 1 cable/connector too... (of course very different in a more complex/bigger/multiservo/scale model & cabling w/ powerboxes etc where it can show all of its power and flexibility)

... so i am connecting every single servo to my ciu-3 to program the servo parameters and forget about the rest

Ciao
Michael
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Last edited by Rabid121; 01-08-2021 at 07:20 AM..
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Old 01-12-2021, 08:19 AM   #6 (permalink)
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Quote:
Originally Posted by Andy from Sandy View Post
On pretty much all fbl controllers it takes a single wire from the sbus receiver to the fbl controller to carry all of the channels.

What I did using vbar (not NEO) is using an ESC with two outputs is run the main to the vbar ESC in and the secondary power to the receiver.

If the ESC you have only has a single output that will go to the ESC input/output on the fbl controller you are using. The receiver will get its power from the sbus socket on the fbl controller.
The only thing I'd add to the above is that Main/Slave going to FBL/Rx depends on what you want to run as governor. I run Kontronik powerjives and a Kolibri and their govs are very very good. I can't say that they're better than CGY750/760R governor, but I prefer the simplicity of having SBUS handle all the channels for servos and gains, and simply plugging the ESC master into Ch3 PWM on the R7003SB Rx.

To answer the OP's question, SBUS is good for reducing cabling on models, but on an FBL heli, the amount isn't really all that much. It shines in large aircraft with many servos. Actually technically speaking, you have more wires with SBUS hubs than using traditional PWM, but the beauty is that you do not need to extend every single servo to reach say from the rudder/elevator servos all the way to the Rx. Instead you just have a network of SBUS hubs with each servo hooking into that 'spine'.
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