Cytron Technologies SmartDrive40 User manual

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ROBOT.HEADtoTOE
ProductUser’sManual–MDS40A
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

MDS40A
SmartDrive40

User'sManual

V1.3

Aug2014



CreatedbyCytronTechnologiesSdn.Bhd.–AllRightsReserved 1
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ROBOT.HEADtoTOE
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Index
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1. IntroductionandOverview 3
2. PackingList 4
3. ProductSpecifications 5
4. BoardLayout 6
5. PowerSupply 8
6. MotorConnection 15
7. SafetyFeatures 19
8. InputModes 20
8.1RCInputMode 21
8.2Analog/PWMInputMode 24
8.3SimplifiedSerialMode 29
8.4PacketizedSerialMode 30
9. Warranty 32
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ROBOT.HEADtoTOE
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1.0INTRODUCTIONANDOVERVIEW
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SmartDrive40 is one of the latest smart series motor drivers designed to drive medium to high               
power brushed DC motor with current capacity up to 80A peak and 40A continuously.             
MOSFETs are switched at 16 KHz to ensure quiet operation and no annoying whining sound.              
Besides, it also equipped with a microcontroller unit to provide smart features such as             
multipleinputmode,currentlimitingandthermalprotection.
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SmartDrive40 can also be hooked up with another similar unit and operates in pair. This              
makedrivingarobotwithdifferentialdriveatrulyplugandplayexperience.
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SomeofthefeaturesforSmartDrive40aresummarizedasbelow:
●BidirectionalcontrolforasinglebrushedDCmotor.
●Supportmotorfrom7Vto25V.
●Maximum current up to 80A peak (1 second), 40A (5 minutes) or 30A (> 20 minutes)               
continuously.
●16KHzswitchingfrequencyforquietoperation.
●Reversepolarityprotection.
●LiPobatterylowvoltagewarning.
●Thermalprotection.
●Currentlimitingbaseontemperature.
●Multipleinputmodes:RC,Analog,PWM,SimplifiedSerialandPacketizedSerial.
●Onboardpushbuttonsforfasttestandmanualoperation.
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ROBOT.HEADtoTOE
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2.0PACKINGLIST
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Please check the parts and components according to the packing lists. If there are any parts               
missing,pleasecontactusat[email protected]immediately.
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1. 1xMDS40ASmartDrive40
2. 1xDeanTConnector(Female)
3. User’s manual, and sample source code can be downloaded from         
http://www.cytron.com.my.
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CreatedbyCytronTechnologiesSdn.Bhd.–AllRightsReserved 4
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3.0PRODUCTSPECIFICATIONS
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Dimensions

No
Parameters
Min
Typical
Max
Unit
1
InputVoltage(MotorSupplyVoltage)
7

25
V
2
I
MAX
(MaximumContinuousMotorCurrent)*
5minutes
>20minutes




40
30
A
A
3
I
PEAK
–(PeakMotorCurrent)**


80
A
4
V
IOH
(LogicInput–HighLevel)***
3

5.5
V
5
V
IOL
(LogicInput–LowLevel)***
0
0
0.5
V
6
5VOutputCurrent


50
mA
* Dependsontheroomtemperature.
** Mustnotexceed1second.
*** NotapplicableforPWMsignalasPWMsignalwillbeconvertedtoanalogvoltage
vialowpassfilterbeforeprocessedbytheprocessor.
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4.0BOARDLAYOUT
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ComponentsonMDS40Aandtheirfunctions:
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1. Dean T Connector (Male) – Connect to power source. For high current application,            
pleasesolderthewiredirectlytothepadatbottomlayer.
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2. LED A – Turns on when the output A is high and output B is low. Indicates the                 
currentflowsfromoutputAtoB.
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3. Terminal Block – Connect to motor. Reverse the polarity if the motor direction is             
incorrect.
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4. LED B – Turns on when the output A is low and output B is high. Indicates the                 
currentflowsfromoutputBtoA.
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5. LEDSTAT–StatusLED.Turnonwhenthemotorisrunning.Turnoffotherwise.
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ROBOT.HEADtoTOE
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6. LEDERR–ErrorLED.Thenumberofblinksiscorrespondingtotheerror.
NumberofBlinks
Error
Description
Off
NoError
Noerrorhasbeendetected.
2
InputError
Invalidornoinputdetected.
3
LipoUndervoltage
TheLiPobatteryvoltageistoolow.
4
OverCurrent
Over current is detected and current     
limitingisoperating.
5
OverTemperature
Theboardtemperatureistoohigh.
6
MOSFETDriver
Error
ErrordetectedbytheMOSFETdriver.
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7. Test Button B – When this button is pressed, current flows from output B to A and                
motorwillturnCCW(orCWdependingontheconnection).
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8. Test Button A – When this button is pressed, current flows from output A to B and                
motorwillturnCW(orCCWdependingontheconnection).

9. Input
PinNo.
PinName
Description
1
IN2
Inputchannel2.
2
IN1
Inputchannel1.
3
+5V
+5Voutput.Donotconnecttoanother5Vsource.
4
Gnd
Ground.


Warning: The +5V output is designed to power the RC receiver only. Do not connect any               
RCservototheRCreceiveranddonotusethe+5Voutputtopoweranyothercircuit.

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10. ModeSelectionDIPSwitch–Usedtoselecttheinputmode.
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11. LEDPWR–PowerLED.Shouldbeonwhentheboardispowered.
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5.0POWERSUPPLY
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SmartDrive40 supports input voltage ranges from 7V to 25V. The recommended power           
sourcesare:
●6–18cellsNiMHorNiCdbattery.
●2–6cellsLiPoorLiIonbattery.
●7V–24Vsealedleadacidbattery.
●7V–24Vpowersupply(Mustbeinparallelwithabatterywithsamevoltage).
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The power source can be connected to SmartDrive40 either via the DeanT connector, or             
soldereddirectlytothepadatthebottomlayer.

NOTE:
1. If a power supply that cannot sink current is being used (bench top and AC to DC                
switching power supply), the input voltage will rise when the driver is regenerating            
(motor is slowing down). Thus, it is important to connect a battery with same voltage              
in parallel with the power supply to absorb the current generated by the motor. Else,              
the input voltage might rise to a level where SmartDrive40 will be destroyed            
permanently.
2. For application where the current is > 20A, it’s recommended to solder the wire             
directlytothepadatbottomlayer.


StepstosolderthewiretotheDeanTconnectorareshownbelow:

TheitemsneededtosolderwiretoDeanTconnectorare:
●Wire
●Shrinkingtube
●FemaleDeanTconnector

1. Before start soldering, identify the polarity of DeanT connector. There are + and –             
markingontheDeanTconnector.
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ROBOT.HEADtoTOE
ProductUser’sManual–MDS40A
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2. Cut and remove the wire insulator. If user needs to solder the wire directly from              
battery to DeanT connector, solder one terminal at a time and leave another one             
wrapped.
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CreatedbyCytronTechnologiesSdn.Bhd.–AllRightsReserved 9
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ROBOT.HEADtoTOE
ProductUser’sManual–MDS40A
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3. Cut the shrinking tube to ~2cm each. Slide in the shrinking tube into the wire. The               
shrinkingtubeisusedtoprotecttheconnectionattheDeanTterminal.
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4. Solder the wire to DeanT connector. Be careful while soldering and make sure the             
polarityiscorrect.
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CreatedbyCytronTechnologiesSdn.Bhd.–AllRightsReserved 10
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