Two Servos, one network cable

[Sportsman7064]

Question:

In the manual the system overview diagrams show two servos connected to the single network cable via a splitter. Is this done simply to enable the disconnect and removal of a single servo? Figure 49 in the install guide shows the two servos wired to the network cable directly.

Since I's assuming it will be very rare to have to remove a servo, I'm leaning on not using the splitter in my application.

Can someone confirm that this approach is OK?

Thanks

 

[Jamie]

Hi Beersrus, to give you the correct answer we will need to know what other SV items you have in the system, ( number of screens, adahrs, ems and servos )
Most likely you will need another splitter/s as each device needs to be connected to the SV-net.( except the SV-Gps) Each screen only has 2 SV-net connectors so you will have to plan what connects to each.

 

[rogersmart]

I have one Dynon supplied long network cable from the panel to the back of the plane where the adhrs is. I tapped (parallel connection) into the 4 network wires of the harness at the root (roll servo) and at the pitch bellcrank (pitch servo) and terminated with connectors that match connectors on the servos. The servo power is independent of the screen power.

 

[Sportsman7064]

Thanks. I have two 10" SV panels, a single ADAHRS unit, an ARINC 429 module, the EMS unit, and two capstan servos.

Russ

 

[mmarien]

I tapped into the cable running to the ADAHRS in the back of the plane and connected to the two servos from there. However, as mentioned on this forum we should be thinking about redundancy of the wiring. What happens if the cable is damaged (loose connection, etc.) at the tap in. In my case, I may loose the servos (not a big deal) and the ADAHRS (big deal). If I redo my network wiring, I think I'll categorize the importance of the devices and consider direct connections to the important devices (ADAHRS/EMS). With my single screen that would mean one SV DB9 split between the ADAHRS and EMS and the other split up for secondary devices.

Just my two cents.

 

[dynonsupport]

Redundancy and ease of removal are both things to think about, for sure, and the splitters can help the wiring go a bit easier. But fundamentally, as long as all of the SkyView network wires are connected together, and the servos are getting power, you can wire them using whatever method/style you prefer.

 

[Sportsman7064]

Thanks!

 

[Bruno]

:-? :-? I also have a ''connection info''question if you don't mind..

Maybe someone can clarified my dilemma..

Here's the system I have right now..
1 SV-700
1 GPS
1 Adahrs
1 Back up battery
2 Autopilot Servo

1, 20' Network cable
1, 10 network cable

My questions are: What other cable/splitters do I need to finish the installation?

Can I connect the Adahrs and the Pitch servo using a splitter (Both mounted in the tail of my RV-4 ) together and run them together via a single network cable to the display?

OR am I better off running the Adahrs to the display using its own network cable and connect the two servos together via a splitter  then connect them to the Skyview??

I've talk to 5-6 differents peoples so far and I got just as many answers...Confuse is the word right now..HELP

Thank you

Bruno

 

[Jamie]

"connect the Adahrs and the Pitch servo using a splitter"
That is what I did, dont forget you will also next an extra power, gnd and disconnect for each AP servo.

 

[dynonsupport]

SkyView doesn't care about the topology of the connections, just as long as everything is electrically connected. The previous poster's point is a good one: remember that the servos can't simply use the straight SkyView network cable after a splitter, since they needs ship's power. We do have servo harnesses that provide the connection to both SkyView Network, and the larger gauge wire for connection to ships power - one harness per servo.

Generically, you're going to end up with (assuming you're not using the EMS, which is what I think your configuration indicates) one splitter somewhere in your configuration to turn your two SkyView Network connectors into the 3 that you need.

You might give us a call and talk with our sales team at 425-402-0433 for some more help here too.

 

[Bruno]

Hello everyone
       Ok here's what I did so please let me know if it make sense to you.

1.- I used an SV-NET-10CP cable to connect the ADAHRS to the Skyview using the Pin Outs ( 9 wires ) of the installed connector.
2.- Then  I used a SV-NET-20PP cable to connect the Pitch servo and bring this cable from the back of my RV-4  next to where the Roll servo is located.
3.- My intention are to use a Splitter to connect the 2 servos  ( 2 to 1 connection ) and then take the cable to the Skyview..

So far I installed the Red,Black and the Yellow wire to their respective pins in the DB9 ( Pin 5,9,3 respectively )( The other wires are connected as per the instructions in the Skyview manual ) for ease of connection  with the intention of separating these wires from the DB9 after the Splitter and route them to their proper positions...

So can you guys tell me if this will work and if not, please tell me what I should do..  before I blow the whole thing up  

Thank you,I greatly appreciate the help

Bruno

 

[dynonsupport]

Generically, if you're using our harnesses, we recommend an SV-NET-SERVO for each servo. It has the larger gauge power wires that don't connect through SkyView network, that instead get connected to ship's power separately, as is required for the servos. Let's put it another way: The servos' power connection should not be routed back through a regular SkyView network cable.

 

[Bruno]

Hello Dynon Support
        Ok, I bought my wiring harness from SteinAir and those are the ones I got.

I.- 1 SV-NET-10 CP (Used to connect the ADAHRS to the Skyview) Will this one work?

2.- 1 SV-NET-20CP ( Used to wire the Pitch servo and eventually connect it to the splitter ( should get it this week ) and on to the Skyview.
I thought that this harness ( SV-NET-20CP) was the servo harness.There were no connectors and it came with pins .Was I supposed to get something else..? That's was I got from SteinAir?

These harnesses are all Dynon harnesses.

Thank you

Bruno

 

[dynonsupport]

1) Yes.

2) No. The SV-NET-20CP is not for servos. SV-NET-SERVO has larger gauge power wires which are split out which are designed to be used with the servos. The SV-NET-20CP is only meant to be used with low power modules such as the ADHARS/EMS/ARINC modules. You can only use the SV-NET-20CP for the data connections to the servo servo if you run power separately and not through that harness.

 

[Bruno]

Hello Dynon Support

        Could you confirm how many wires there are in the SV-NET Servo cable?

       There are 9 wires in a   SV-NET-10 CP  and I believe only 7  wires ( Don't have the cable in hand right now ) in the Servo wire bundle but I would like to make sure I have the proper cable before I order a new one..

Thank you

Bruno
rv4@videotron.ca

 

[dynonsupport]

SV-NET-SERVO has 7 wires:
20 AWG Red (power to servo) and Black (ground to servo)
22 AWG Blue, Green, White w/Blue, White w/Green (SkyView Network data)
22 AWG Yellow (Servo disconnect pushbutton)

The four SkyView network data wires match up with the same colored wires in the SV-NET-10CP you have. The other five wires in the SV-NET-10CP are not used by the servos.

Hello Dynon Support

        Could you confirm how many wires there are in the SV-NET Servo cable?

       There are 9 wires in a   SV-NET-10 CP  and I believe only 7  wires ( Don't have the cable in hand right now ) in the Servo wire bundle but I would like to make sure I have the proper cable before I order a new one..

Thank you

Bruno
rv4@videotron.ca