SK720 Flybarless System - User Manual
Contents
1. Contents Your servo power bus package includes e SK PW7 Servo Power Bus e Four servo cable jumpers 2011 Skookum Robotics Ltd 3 Safety The SK PW7 servo power bus does not include a fuse or voltage regulator Install switches fuses and or a BEC as required for your installation into your circuit per standard practices Ideally check all electrical connections using a multi meter prior to connecting the power bus to any voltage source Do not exceed 20 Amps continuous current on either the Advanced Power Bus or the standard Power Bus WARNING The Term High Voltage is used in this manual to differentiate 8 4 Volt servo systems from the standard 5 Volt servo systems Do not connect the SK PW7 servo power bus to any supply voltage higher than 10 Volts 2011 Skookum Robotics Ltd 6 4 Principle of Operation The SK PW7 servo power bus is designed to provide the power required for your high voltage servos by letting you attach them directly to a 2S 8 4V LiPo battery The device contains two separate power rails one of which may be connected to a 5 Volt supply such as a BEC or standard 4 cell NiCd battery while the other is connected directly to the 8 4V battery This allows you to use both high and low voltage servos at the same time SK PW7 Top View Figure 1 SK PW7 The Advanced power bus contains a soft switch that turns the SK PW7 s high voltage rail on and off The switch is activated by2. SK PW7 Power sus User Manual and Setup Guide Conveniently connect high or standard voltage servos to your SK 20 using the light and compact SK PW7 power bus Rated for a 20 Amp capacity this power bus will eliminate brown outs and simplify wiring aboard your medium to large size R C helicopter And with the new Advanced Power Bus you can switch your helicopter s electronics on and off simply by connecting disconnecting a jumper plug Rev 3 00 SK PW7 User Manual amp Setup Guide Table of Contents EMAC OGQU CUO ID cis eca titre ee everest rsa twenetatunese 4 2 Package Contents ccccccccscssseceeceeeeseeeeeeeeseneceeseneeeeseneseesees 5 SO E E 6 4 Principle of Operation cccccceeeeeeeeeeeeeeeeeeeeeeeeseesensenseneeeees 7 3 CONNECHONS sssr eee eee eee ere 8 5 1 Satellite Receiver with High Voltage Servos 11 5 2 Satellite Receiver with Some 5V Servos ccsceeeeeeeees 12 5 3 Traditional Receiver with High Voltage Servos 13 5 4 Traditional Receiver with Some 5V Servos 0008 14 Appendix A Specifications cccccseceeeeeeeeeseeeeeeeeseeseneeneeeenees 15 Appendix B Signal Bus Connections Schematic 15 Appendix C Warranty esses veccescsecseiie ce vetcnineandenesanatenncebntantieencssedsvesas 16 2011 Skookum Robotics Ltd 2 List of Figures 1 Introduction Figure DS RSP VG sete acces teneeeerecauewnbemmeseuncense
3. ceiver SK PW7 r oes ee ee ee ie ee ee 1 SK720 i IO E i IO D l EX LED IO B i IO D E HV THROTTLE SERVO IO A T i IO C TAIL BUS D oun JUMPER PARE BUS C na Pwr Hv BUS B SW L HV TAIL SERVO i TAIL BUS A i i SW R i i TAIL SWASH SERVOS i ea i i SW A Loea ata E E J SATELLITE RECEIVER Figure 5 Typical Installation with High Voltage Servos and Satellite Receiver In this case the throttle servo is supplied with 8 4 V by means of a jumper that connects the high and low voltage rails The whole system including the SK720 is supplied with 8 4 V from the 2S 8 4V LiPo battery connected to the 18 gauge silicone wires 2011 Skookum Robotics Ltd 11 5 2 Satellite Receiver with Some 5V Servos The schematic in Figure 6 below shows a typical instillation of a system with a satellite receiver that uses some low voltage servos SK PW7 gp ag a 1 SK720 i IO E IO D i EX LED IO B i IO D E THROTTLE SERVO IO A T i ae jaravevacevatata TAIL BUS D a a j OUTPUT PWR LV BUS C a i BEC input Pwr Hv BUS B SW L HV TAIL SERVO i TAL BUS A E m m SW R i SW C SW C i SW R TAIL HV SWASH servos i A SW A Da a ares Epmned SATELLITE RECEIVER 2S 8 4V battery Figure 6 Typical Installation with Satellite Receiver and some 5V Servos In this example the throttle servo is supplied with 5 0 V by means of a BEC connected across the PWR HV and PWR LV sockets Servos connected to the IO B IO D and IO E sockets will also be
4. hiesmucatauneelieuneeeatet 7 The SK PW7 servo power bus is a compact and light solution for your servo Figure 2 SK720 Connected to SK PW7 ccscsssssssssssseeeeeees 8 wiring needs Intended for use on medium and large size radio controlled helicopters it allows connection of an SK720 digital flybar to your high voltage Figure 3 Schematic of SK720 Connections to SK PW7 9 8 4 Volt typical servos The rated 20 Amp capacity will also help eliminate brownouts And the power bus even offers the flexibility to use a combination of Figure 4 SK PW7 Power Rails Schematic c0e0e0e 10 hioieand anidatd ae SENSON cures a eee dike licopicr while Figure 5 Typical Installation with High Voltage Servos maintaining a tidy wiring installation and Satellite Receiver ccccceeeeeeeeeeeeeeneeneeneeees 11 The new Advanced Power Bus also contains a soft switch to enable you to turn Figure 6 Typical Installation with Satellite Receiver your helicopter s electronics on and off simply by connecting disconnecting a ANd SOME 5V SEPVOS scceccecceeeeeeeeeeeeeceeceecneeneeseaes 12 jumper plug Figure 7 Typical Traditional Receiver Instillation With HV SS GIV OS essen tececcis cece ete eneee 13 Figure 8 Typical Traditional Receiver Instillation With Some 5V SCIrVOS cccecececececececececececececececeneneees 14 2011 Skookum Robotics Ltd 3 2011 Skookum Robotics Ltd 4 2 Package
5. ill check it over for only the cost of postage If the unit has malfunctioned and the 90 day 18 Gauge BUS A__ BUS B warranty period has expired we will attempt repair and discuss the cost of Silicone Wires Top Tail SW C Gnd Middie EN SW R possible repairs with the owner again for only the cost of postage Bottom Gnd SW L Top If you wish to return the SK PW7 power bus please write WARRANTY RETURN clearly on the shipping box and mail it to the address given below Manufactured in Canada by Skookum Robotics Ltd Email tech skookumrobotics com Website www skookumrobotics com Return Mail PO Box 46912 Stn D Vancouver BC V6J 5M4 Canada 2011 Skookum Robotics Ltd 15 2011 Skookum Robotics Ltd 16
6. ing shown in Figure 2 Can you see that the servo jumper wires connected to BUS B SW R SW L SW A IO B IO A T SW A TAIL BUS D PWR LV BUS C Pwr Hv BUS B m 1 and BUS C should be aligned horizontally across the top of the SK720 i i IO D i IO B i I IO A T K PW7 ainiin aeinn TAIL BUS D r o i PWR LV BUS C i I BUS B i EX LED i PVVR HV Da IO D E i TAIL BUS A IO A T IO C SW C i i i i i i i i SW L J TAIL BUS A nie SW C SW C a TAIL SW A PWR HV E A A eee ok J Figure 4 SK PW7 Power Rails Schematic The 36 pin front face includes two power rails labelled in orange in Figure 3 Schematic of SK720 Connections to SK PW7 F igure 4 above The high voltage 8 4 Volt rail is labelled PWR HV while the low voltage 5 Volt rail is marked as PWR LV The PWR HV rail is powered directly by the two 18 gauge silicone wires fitted to the back of the unit The PWR LV rail is not powered unless it is connected to the PWR HV rail by means of a jumper or to a separate voltage source such as a battery or BEC WARNING the SK PW7 servo power bus does not include a switch fuse or voltage regulator These must be installed separately as required for your installation 2011 Skookum Robotics Ltd 9 2011 Skookum Robotics Ltd 10 5 1 Satellite Receiver with High Voltage Servos The schematic in Figure 5 below illustrates a typical installation of a system that uses high voltage servos and a satellite re
7. r a high voltage tail servo or a 5V tail servo together with your high voltage swash servos In this example the tail servo is supplied with 5V by a BEC connected between the PWR HV and PWR LV sockets The BEC is supplied with 8 4V from the PWR HV connection The BEC s 5V output is connected to the PWR LV socket CAUTION A traditional receiver connected as shown in Figure 8 will receive 8 4V Be sure your receiver can handle that amount of voltage if you wire it this way 2011 Skookum Robotics Ltd 14 Appendix C Warranty Appendix A Specifications Warranty and Repair Skookum Robotics Ltd warrants this product against any defects in materials or workmanship for a period of 90 days from the purchase date This warranty 1s l limited to the original purchaser In the event of a malfunction Skookum Robotics will repair or replace the product to meet its standard operating condition This warranty does not apply in cases where the product has been overheated electrically shorted subject to crash damage otherwise abused or had unauthorized repair attempts UNDER NO CIRCUMSTANCES DOES SKOOKUM ROBOTICS ACCEPT LIABILITY FOR INCIDENTAL DAMAGE OR INJURIES RESULTING FROM THE OPERATION OF THE SK PW7 POWER BUS OR OTHER Appendix B Signal Bus Connections Schematic PRODUCTS Skookum Robotics will provide customers with technical assistance by email free of charge If a unit s serviceability is in question following a crash we w
8. removing a jumper plug connected to the plug on the end of the yellow red wires that extend from the back of the unit The power bus can also be used to power your SK720 When properly connected the SK720 will be powered off the PWR HV power rail The SK720 is rated for up to 10V so a single 8 4 Volt 2 Cell LiPo battery will be sufficient to power both your SK720 and your high voltage servos 2011 Skookum Robotics Ltd 7 5 Connections The SK PW7 has twelve servo plug sockets on the front face Notice that the labels on this face are the same as those on the SK720 s servo connections You can connect your servos to the sockets on the power bus just as you would connect them to the SK720 The back face of the SK PW7 has four servo plug sockets and two 18 gauge silicone wires The four servo plug sockets on this face of the SK PW7 power bus are used to connect the SK PW7 to the SK720 as shown in Figure 2 and Figure 3 of this manual The Advanced power bus has a yellow red wire extending from the back of the case The jumper connected to the plug at the end of this wire controls the Advanced power bus built in soft switch Figure 2 SK720 Connected to SK PW7 You will need to solder a suitable connector i e a Dean s connector to the 18 gauge silicone wires before you can connect the SK PW7 power bus to your battery 2011 Skookum Robotics Ltd 8 Have a close look at Figure 3 below It shows a schematic view of the wir
9. supplied with 5 0 V from the BEC when your SK PW7 power bus is set up this way The rest of the system including the SK720 is supplied with 8 4 V from the 2S LiPo battery that is connected to the 18 gauge silicone wires The socket marked TAIL is a special case The SK PW7 Power Bus has one socket for the tail servo on the PWR HV side and one on the PWR LV side This gives you the flexibility to use either a high voltage tail servo or a 5V tail servo together with your high voltage swash servos 2011 Skookum Robotics Ltd 12 5 3 Traditional Receiver with High Voltage Servos You can also use the SK PW7 power bus with a traditional receiver TRADITIONAL RECEIVER THROTTLE THROTTLE SERVO OR ESC GAIN BANK SELECT COLLECTIVE RUDDER ELEVATOR OEL receiver cable kit SK PW7 ppt a ttt y SK720 i IO E i OD i EX LED IO B IO D E Hike BUS D i EED 0 A T PWR LV BUS C SWA BUS B s a TV Bus a EE m SW L i SW R SW C l SW C SW R EED TAIL SW L SW A TAIL SERVO SWASH SERVOS i 2S 8 4V battery Figure 7 Typical Traditional Receiver Installation with HV Servos If you are using a traditional receiver with your SK720 i e you re not using satellite receivers then servo ports IO A through IO D are not available In this case only connect jumpers BUS A and BUS B You will then need to connect servo wire jumpers from the SK720 s ports IO A through Ext LED to your traditional receiver as sho
10. wn in Figure 7 above In this case the whole system including the SK720 and traditional receiver is supplied with 8 4 V from the 2S LiPo battery connected to the 18 gauge silicone wires CAUTION A traditional receiver connected as shown in Figure 7 will receive 8 4V Be sure your receiver can handle that amount of voltage if you wire it this way 2011 Skookum Robotics Ltd 13 5 4 Traditional Receiver with Some 5V Servos TRADITIONAL RECEIVER THROTTLE __ THROTTLE SERVO OR ESC GAIN BANK SELECT COLLECTIVE RUDDER ELEVATOR seca receiver cable kit SK PW7 r ne E T T T N a T T N N a a a T 1 SK720 l IO E i IO D EX LED IO B IO D E IO A T i IO C ov TAIL SERVO TAIL BUS D 10 8 OUTPUT PWR LV BUS C m EE 10 A T SW A BUS B E_E E PWR HV Bus a EEB SW L TAIL i SW R SW C J SW C SW R TAIL SW L SW A 2S 8 4V battery Figure 8 Typical Traditional Receiver Installation with Some 5V servos If you are using a traditional receiver with your SK720 then servo ports IO A through IO D are not available In this case only connect jumpers BUS A and BUS B You will then need to connect servo wire jumpers from the SK720 s ports IO A through Ext LED to your traditional receiver as shown in Figure 8 above The socket marked TAIL is a special case The SK PW7 Power Bus has one socket for the tail servo on the PWR HV side and one on the PWR LV side This gives you the flexibility to use eithe
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