powerbus to bus adaptors and JR Nx8931 servos

    Hello,

    I am using a JR Xbus system to power 22 JR NX 8931 servos in a giant scale model driven from a JR28X transmitter. From 2 JR XB2-CBH hubs I am using powerbus lead to Powebus to Bus quad adaptors to the servos. Although the system works perfectly the issue that I am faced with is that I am unable to program the servos when plugged in to the adaptors.

    It is necessary for me to program the servos directly from the receiver. When plugged back into the Powerbus to Bus adaptors the servos maintain their programmed parameters.


    Can you explain the reason for this and confirm the compatibility of the Powerbus to Bus quad adaptors with the JR Xbus system and NX servos.


    Thankyou

    Andrew Herzfeld

    Hello,


    the PowerBus adapter are made for S.BUS. This is the same signal technoligy like JR X-BUS.


    BUT: It´s only unidirectional, so the signal goes only to the servos, not back from servo to receiver. This diables the programming funtion of the servos.


    So in sum: You can use the adapters and all it´s advantages and safety featurs, but you cannot programm your servos when they are connected to this.

    Ok. are there any plans for a by-directional PowerBus adapter for X-bus?

    Hello,


    maybe later - once our P²-BUS is on the market.

    If you want a real save Bus system which is also reliable use a PowerBox Royal or Champion and use the PowerBus parts with fused outputs. The JR Bus was just a try to realize a bus system but as you can see simply on the wiring they offer - it´s just a try!

    Richard Deutsch wrote:

    Hello,


    maybe later - once our P²-BUS is on the market.

    If you want a real save Bus system which is also reliable use a PowerBox Royal or Champion and use the PowerBus parts with fused outputs. The JR Bus was just a try to realize a bus system but as you can see simply on the wiring they offer - it´s just a try!

    Hi Richard.

    Can you provide more info on the coming P2-Bus system? Also, please explain the "fused outputs" for safety? Are they the PowerBus adapters, the PWM adapters, or both?


    Thank you

    ~alan

    OK. That's good! Do you foresee or know of any issue with using the PowerBus converter with the XB1 or XB2 Power hubs? I am able to replace one end of the PowerBus extension cable with a Deans connector for the power leads and a regular servo wire connector for the signal wire. With this wire adapter and your PowerBus converter, the NX servos seam to be working fine. Of course I am unable to program the servos through this circuit but I am just concerned with reliable function and your fused circuit protection.

    Richard Deutsch wrote:

    Hello,

    not sure if the NX servos understand S.BUS... from my knowledge JR uses it´s own Bus protocoll

    Yes, whatever the Xbus protocol is. I'm just trying to be sure there would be no conflicts or signal loss with the PowerBus converters. I like them and want to continue to use them since I discovered a way to make a patch lead from the JR hub to the PowerBus converters. Your thoughts?