Instruction Manual PowErBus
Dear customer, We are delighted that you have decided to purchase this PowerBox accessory from our range. We hope you have many hours of pleasure and great success with your PowerBUS devices. The PowerBUS is the basis of a completely new method of wiring servos. The PowerBUS consists of a three-core cable which supplies current and signal to the servos connected to it. At first glance this is nothing unusual, but the big difference lies in the signal wire.
shorted out at a servo distributor, within a few micro-seconds that output is switched off, and the bus lead remains active. This supplementary feature is very important to flight safety, since a servo bus without it can never be suitable for use in valuable model aircraft! The following section introduces and describes the individual components of the PowerBUS: 1. OVERVIEW OF POWERBUS COMPONENTS Three different types of distributor are available: Order No.
The following standard cable lengths are available: Order No. 9126/30 PowerBUS connecting lead, MPX plug / MPX socket, length 30 cm Order No. 9126/60 PowerBUS connecting lead, MPX plug / MPX socket, length 60 cm Order No. 9126/90 PowerBUS connecting lead, MPX plug / MPX socket, length 90 cm Order No. 9126/120 PowerBUS connecting lead, MPX plug / MPX socket, length 120 cm We can also make up PowerBUS connecting leads to the exact lengths you require.
2. DESCRIPTION OF POWERBUS COMPONENTS a) PowerBUS Splitter The PowerBUS Splitter is required if the PowerBox does not feature a sufficient number of outputs. For example, if you wish to use the bus technology for both wings as weil as elevator and rudder, you will need a total of three bus leads. The following diagram shows a typical PowerBUS installation: PowerBUS Components PowerBUS Wires Servo Wires www.powerbox-systems.
b) PowerBUS to BUS Adapter The PowerBox to BUS Adapter is designed for use with servos which are fitted with an integral bus decoder. At present these are Futaba S-Bus servos. When these servos are used, the channel assignment is programmed directly at the servo. The PowerBox to BUS Adapter does not feature a decoder, but nevertheless all the outputs are protected against short-circuits both in the signal wire and the power supply wires, as you would expect.
3. THE POWERBUS - BASIC INFORMATION The PowerBUS can carry 16 channels + 2 switched channels. lt is possible to assign any functions you wish to the bus, thanks to the unrestricted channel assignment facilities of the Champion SRS and Royal SRS. This is important: for example, if you wish to assign the aileron signal - as it comes from the transmitter - to the PowerBUS, and also wish to include the gyro gain and servo match settings. The door sequencer function can also be assigned to the PowerBUS.
You will find this standard display in the OUTPUT MAPPING menu of the Royal SRS. Functions can only be assigned to the PowerBUS if they have already been defined under OUTPUT MAPPING. These instructions include an example which shows the step-by-step procedure for assigning the bus; it also shows how to use the ServoMatch function in conjunction with the PowerBUS. The function of output G is GYRO AILERON A, and the function of output H is also GYRO AILERON A.
The column under P-BUS indicates the PowerBUS channel number. CH1 - CH16 are proportional channels, while CH17 and CH18 are switched channels. At a later stage these numbers are crucial when we move on to programming the servo or the PowerBUS adapter. The OUTPUT is user-variable; here you determine which PowerBox output (A - X) is assigned to the selected BUS channel (1 - 18). The FUNCTION column shows which function is assigned to the output you have selected.
This is the procedure: b1) Do not connect the adapter to the PowerBUS lead at this stage. b2) Connect the PowerBUS lead to the PowerBox. b3) Press the SET button on the adapter while you plug in the PowerBUS lead. b4) The red LED lights up at servo 1, then moves step-by-step to servo 4 while you hold the button pressed in. b5) Release the button when the red light is aligned with the servo output which you want to set up. The red LED now shines less strongly.
Hold the SET button pressed in once more while you connect the bus adapter, but this time wait until the LED moves on to servo output 2. Servo output 2 at the adapter is required to generate PowerBox output H: press the SET button three times in order to assign bus channel 3 to servo output 2. Disconnect the bus adapter again. Now connect the bus adapter and the two servos (outputs 1 and 2), and move the aileron stick at the transmitter: the two servos should operate in parallel.
4. POWERBUS CABLE PowerBUS cable is manufactured specially for PowerBox-Systems. The PowerBUS cable is extremely flexible, and is made up using very thin individual strands in order to pass the maximum current through the given cross-sectional area of 1.5mm2. The insulation is made of a special material which is also employed in full-size aviation. lt is virtually indestructible, and offers excellent protection even when reduced to just a thin film around the copper conductor.
5. PIN ASSIGNMENT One great advantage of the PowerBUS is that it employs standard commercial MPX connectors. We supply PowerBUS leads in standard lengths, but can also make them up to the lengths you need. Please note that some installations present problems, with the result that the connectors can only be attached once the lead has been installed.
6. SERVICE NOTE We make every effort to provide a good service to our customers, and have now established a Support Forum which covers all queries relating to our products. This helps us considerably, as we no longer have to answer frequently asked questions again and again. At the same time it gives you the opportunity to obtain assistance all round the clock, and even at weekends. The answers come from the PowerBox team, which guarantees that the answers are correct.
The guarantee does not cover damage caused by incorrect usage, e.g. reverse polarity, excessive vibration, excessive voltage, damp, fuel, and short-circuits. The same applies to defects due to severe wear. We accept no liability for transit damage or loss of your shipment.
12/2020 PowerBox-Systems GmbH Ludwig-Auer-Straße 5 D-86609 Donauwoerth Germany +49-906-99 99 9-200 +49-906-99 99 9-209 www.powerbox-systems.
