maxon motor 380200 User manual

maxon motor
maxon motor control 1-Q-EC Amplifier DEC Module 50/5
Order number 380200
Operating Instructions Edition April 2015
The DEC Module 50/5 (Digital EC Controller) is a small
1-quadrant digital controller for the control of brushless DC motors
(Electronic Commutated motors) up to 250 W.
The used EC motor must be equipped with digital Hall sensors.
Features:
• Digital speed control
operates as «closed loop» or as «open loop» speed controller
• Maximum speed 80 000 rpm (motor with 1 pole pair)
• Set value input through external analogue voltage (0 ... +5 V)
• 3 different speed ranges selectable
• Direction of rotation preset by a digital signal
• The output stage can be enabled or disabled
• Maximum output current limit adjustable up to 10 A
• Motor speed can be monitored with the «Monitor n» output
• Status indication via «Ready»output
• Blockage protection (current limit for blocked motor)
• Protective functions: undervoltage, overvoltage and thermal overload
• Standardized connector strip, pitch 2.54 mm
Thanks to the wide input power supply range of 6...50 VDC (optional 5 VDC operation possible), the DEC Module
50/5 is very versatile and can be used with various power supplies.
A sturdy PI speed controller design is an ideal premise for immediate operation.
The well-priced and miniaturized OEM module seamlessly integrates into applications. Now the customer can
fully focus on developing his/hers own device - while being able to make use of maxon motor‘s vast drive know-
how. For start-up maxon motor offers a comprehensive Evaluation Board.
The latest edition of these operating instructions may be downloaded from the internet as a PDF-file under
www.maxonmotor.com, category «Service & Downloads», order number 380200 or
in the e-shop http://shop.maxonmotor.com.
Table of Contents
1 Safety Instructions ............................................................................................................................................. 2
2 Technical Data ................................................................................................................................................... 3
3 Pin assignment DEC Module 50/5 ..................................................................................................................... 5
4 Commissioning Instructions............................................................................................................................... 6
5 Functional Description of Inputs and Outputs.................................................................................................... 7
6 Protective functions ......................................................................................................................................... 14
7 Block Diagram ................................................................................................................................................. 15
8 Dimensional Drawing ....................................................................................................................................... 16
9 Accessories (not included in delivery) ............................................................................................................. 16
10 Appendix «Motherboard Design Guide» ....................................................................................................... 16

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
1 Safety Instructions
Skilled Personnel
Installation and commissioning of the equipment shall only be performed by
experienced, skilled personnel.
Statutory Regulations
The user must ensure that the amplifier and the components belonging to it
are assembled and connected according to local statutory regulations.
Disconnect Load
For primary operation the motor should be free running, i.e. with load discon-
nected.
Additional Safety Equipment
Any electronic apparatus is, in principle, not fail-safe. Machines and appara-
tus must therefore be fitted with independent monitoring and safety equip-
ment. If the equipment breaks down, if it is operated incorrectly, if the control
unit breaks down or if the cables break, etc., it must be ensured that the drive
or the complete apparatus is kept in a safe operating mode.
Repairs
Repairs may be made by authorized personnel only or by the manufacturer.
Improper repairs can result in substantial dangers for the user
Danger
During installation of the DEC Module, make sure to disconnect all apparatus
from the electrical supply.
After switch-on, do not touch any life parts!
Wiring Procedure
All electrical connections should only be connected or disconnected when the
power is switched off.
Max. Supply voltage
Make sure that the supply voltage is between 6 and 55 VDC. Voltage higher
than 56 VDC or wrong polarity will destroy the unit.
Short Circuit and Earth Fault
The amplifier is not protected against winding short circuits against ground
safety earth and/or GND!
Electrostatic sensitive device (ESD)
a
a
a
a
a
a
a
a
a
a

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maxon motor
Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
2 Technical Data
2.1 Electrical data
Nominal supply voltage +V
CC
..................................................................... 6 … 50 VDC (optional 5 VDC
1
)
Absolute minimum supply voltage +V
cc min
........................................................... 6 VDC (optional 5 VDC
1
)
Absolute maximum supply voltage +V
cc max
.................................................................................... 55 VDC
Max. output voltage ...................................................................................................................... 0.95 • V
CC
Continuous output current I
cont
................................................................................................................5 A
Max. output current I
max
.........................................................................................................................10 A
Switching frequency.......................................................................................................................46.8 kHz
Max. speed (motor with 1 pole pair) ......................................................................................... 80 000 rpm
2.2 Inputs
«Set value speed» ........................................................Analogue input (0 ... 5 V); Resolution: 1024 steps
«Enable» ......................................................................+2.4 … +55 V (R
i
= 100 kΩ) or switch against V
CC
«Direction» ...................................................................+2.4 … +55 V (R
i
= 100 kΩ) or switch against V
CC
Speed range «DigIN1 » ...............................+2.4 … +55 V (R
pull-up
= 47 kΩ at 5 V) or switch against Gnd
Speed range «DigIN2 » ...............................+2.4 … +55 V (R
pull-up
= 47 kΩ at 5 V) or switch against Gnd
«Set current limit» .............................................................................external resistor (
1
/
16
W) against Gnd
Hall sensors ................................................................ «Hall sensor 1», «Hall sensor 2», «Hall sensor 3»
2.3 Output
Motor speed «Monitor n» ............................................................... Digital output signal, 5 V (R
o
= 47 kΩ)
Status indication «Ready» .............................................................. Digital output signal, 5 V (R
o
= 47 kΩ)
2.4 Voltage output
+5 VDC output voltage «V
CC
Hall» ............................................................................+5 VDC, max. 35 mA
2.5 Motor connections
Motor connections ...................................... «Motor winding 1», « Motor winding 2», « Motor winding 3»
2.6 Ambient temperature
Operation .................................................................................................................................-10 ... +45°C
Storage .....................................................................................................................................-40 ... +85°C
2.7 Humidity range
Non condensating .......................................................................................................................20 ... 80 %
2.8 Protective functions
Current limitation (cycle-by-cycle) ........................................................... adjustable up to maximum 10 A
Blockage ........................................................................ Motor current limitation if motor shaft is blocked
Undervoltage shutdown ....................................................................................... shutdown if V
CC
< 6 VDC
Overvoltage shutdown ....................................................................................... shutdown if V
CC
> 56 VDC
Thermal overload protection of power stage .............................................. shutdown if T
power stage
> 100°C
2.9 Mechanical data
Weight ........................................................................................................................................ approx. 9 g
Dimensions (LxWxH). ......................................................................................... 43.18 x 27.94 x 12.7 mm
....................................................................................................................................... 1.7 x 1.1 x 0.5 Inch
2.10 Terminals
Pin header 1 ..................................................................................................................................2 x 9 pins
.......................................................................................................... double-row, pitch 2.54 mm (0.1 Inch)
Pin header 2 ....................................................................................................................................... 8 pins
............................................................................................................single row, pitch 2.54 mm (0.1 Inch)
1 5V operating see chapter «10.8.2 Low Voltage +5V operation»

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
2.11 Standards
The described device has been successfully tested for compliance with the
below listed standards. In practical terms, only the complete system (the fully
operational equipment comprising all individual components, such as motor,
servo controller, power supply unit, EMC filter, cabling etc.) can undergo an
EMC test to ensure interference-free operation.
Important Notice
a The device’s compliance with the mentioned standards does not im-
ply its compliance within the final, ready to operate setup. In order to
achieve compliance of your operational system, you must perform EMC
testing of the involved equipment as a whole.
Electromagnetic compatibility
Generic
standards
IEC/EN 61000-6-2 Immunity for industrial environments
IEC/EN 61000-6-4 Emission standard for industrial environ-
ments
Applied
standards
IEC/EN 61000-6-4
EN 55011
(CISPR11)
RF disturbances
IEC/EN 61000-4-3 Radiated electromagnetic field > 10V/m
IEC/EN 61000-4-4 Electrical fast transient burst +/- 2 kV
IEC/EN 61000-4-6 RF conducted disturbances 10Vrms
IEC/EN 61000-4-8 Power frequency magnetic field 30A/m
Others
Safety
standards
UL File Number E172472, E92481 or E76251; unassembled
printed circuit board
Reliability MIL-HDBK-217F
Reliability prediction of electronic equipment
Environment: Ground, benign (GB)
Ambient temperature: 298 K (25°C)
Component stress: In accordance with cir-
cuit diagram and nominal power
Mean Time Between Failures (MTBF):
1‘434‘315 hours

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maxon motor
Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
3 Pin assignment DEC Module 50/5
Top view
3.1 Pin assignment
Pin Signal Description
1 W1 Motor winding 1
2 W1 Motor winding 1
3 W2 Motor winding 2
4 W2 Motor winding 2
5 W3 Motor winding 3
6 W3 Motor winding 3
7 +Vcc Supply voltage 6...50 VDC
8 +Vcc Supply voltage 6...50 VDC
9 Gnd Ground
10 Gnd Ground
11 Vcc Hall +5 VDC output voltage
12 n.c. do not connect
13 H1 Hall sensor 1
14 Gnd Ground
15 H2 Hall sensor 2
16 Gnd Ground
17 H3 Hall sensor 3
18 Monitor n Speed monitor output
19 Ready Status indication output
20 DigIN1 Digital input 1
21 DigIN2 Digital input 2
22 Enable Enable input
23 Direction Direction input
24 Gnd Ground
25 Set current limit Set current limit input
26 Set value speed Set value speed input
12
17 18 19
26
DEC Module 50/5

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
4 Commissioning Instructions
4.1 Power supply layout
Any available power supply can be used, as long as it meets the minimum
requirements shown below.
During commissioning and adjustment phases, we recommend to mechani-
cally separate the motor from the machine to prevent damage due to uncon-
trolled motion!
Power supply requirements
Nominal output voltage 6 VDC < VCC < 50 VDC
Absolute minimum output voltage 6 VDC
Absolute maximum output voltage 55 VDC
Output current depending on load, continuous max. 5 A
acceleration, short-time max. 10 A
The required supply voltage can be calculated as follows:
Known values
ÖOperating torque MB [mNm]
ÖOperating speed nB [rpm]
ÖNominal motor voltage UN [V]
ÖMotor no-load speed at UN, n0 [rpm]
ÖSpeed/torque gradient of the motor Dn/DM [rpm/mNm]
Sought value
ÖSupply voltage VCC [V]
Solution
VM
M
n
n
n
U
VBB
o
N
cc 3.0
95.0
1
¸
¹
·
¨
©
§
'
'

Select a power supply capable of supplying this calculated voltage under
load. The formula takes into account a maximum PWM duty cycle of 95%
and a 0.3 V maximum voltage drop (at maximum output current) of the power
stage.
What speed can be reached with a given power supply:

»
¼
º
«
¬
ª
'
'

»
¼
º
«
¬
ª B
N
ccB M
M
n
U
n
VVn 0
3.095.0
Note
ÖDuring controlled deceleration, the power supply must be able to buffer
the back-fed energy e.g. in a capacitor.
ÖThe under voltage protection switches off the DEC Module 50/5, as soon
as the supply voltage VCC drops below 6 V. Therefore, at low supply vol-
tage VCC attention has to be payed to the voltage drop over the supplying
cables.

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maxon motor
Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
5 Functional Description of Inputs and Outputs
5.1 Inputs
5.1.1 Speed range and mode selection with «DigIN1» and «DigIN2»
The digital inputs «DigIN1» [20] and «DigIN2» [21] determine both, the ope-
ration mode (digital speed controller or digital speed actuator) and the speed
range in speed set value mode.
Motor type
DigIN1 DigIN2 1 pole pair 4 pole pair 8 pole pair
0 0 Open loop speed control, 0...95 % PWM
depending on the «Set value speed» input voltage
1 0 500...5 000 rpm 125...1 250 rpm 62...625 rpm
0 1 500...20 000 rpm 125... 5 000 rpm 62...2 500 rpm
1 1 500...80 000 rpm 125...20 000 rpm 62...10 000 rpm
Please note
ÖIf the signal level of the digital inputs DigIN1 [20] and DigIN2 [21] are
changed, the new levels are adopted by a disable-enable procedure.
If the input «DigIN» is not connected (floating) or a voltage higher than 2.4 V
is applied, the input is active.
Logic 1 Input not connected (floating)
Input voltage > 2.4 V
Input active
If the input «DigIN» is set to ground potential or a voltage smaller than 0.8 V
is applied, the digital input is inactive
Logic 0 Input set to Gnd
Input voltage < 0.8 V
Input inactive
The inputs «DigIN1»and «DigIN2» are protected against overvoltage.
Digital input 1 Pin number [20] «DigIN1»
Digital input 2 Pin number [21] «DigIN2»
Input voltage range 0 ... +5 V
Input impedance 47 kΩ pull-up resistor against 5 V
Continuous overvoltage protection -55 ... +55 V

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
5.1.2 Set value «Set value speed»
The external analogue set value is predetermined at the «Set value speed»
input [26]. The «Set value speed» input sets the rotational speed of the motor
shaft.
By adjusting the signal levels on digital inputs «DigIN1 [20]» and
«DigIN2 [21]» the speed range must be set in advance.
Motor type
DigIN1 DigIN2 1 pole pair 4 pole pair 8 pole pair
0 0 Open loop speed control, 0...95 % PWM
depending on the «Set value speed» input voltage
1 0 500...5 000 rpm 125...1 250 rpm 62...625 rpm
0 1 500...20 000 rpm 125...5 000 rpm 62...2 500 rpm
1 1 500...80 000 rpm 125...20 000 rpm 62...10 000 rpm
Note
ÖIf the signal level of the digital inputs DigIN1 [20] and DigIN2 [21] are
changed, the new levels are adopted by a disable-enable procedure.
Set value voltage Description
0 V ... 0.1 V Operation at minimum speed
0.1 V ... 5.0 V Linear speed adjustment
The actual speed value is calculated according the following formula:
Known values
Ö Minimum speed (see table above) nmin [rpm]
Ö Maximum speed (see table above) nmax [rpm]
Ö Set value voltage Vset [V] respectively speed n [rpm]
Sought value
Ö speed n [rpm]
Sought value
Ö Set value voltage Vset [V]
Solution
>@
>@

minminmax
9.4
1.0 nnn
V
VV
nset 
»
¼
º
«
¬
ª

Solution
>@
>@
VV
nn
nn
Vset 1.09.4
minmax
min 
¸
¸
¹
·
¨
¨
©
§


The «Set value speed» input is protected against overvoltage.
Set value speed input Pin number [26] «Set value speed»
Input voltage range 0 ... +5 V (referenced to Gnd)
Resolution 1024 steps (4.88 mV)
Input impedance 107 kΩ (in range 0 ... +5 V)
Continuous overvoltage protection -55 ... +55 V
aThe change rate of the set value signal is limited internally with a ramp
function. It nominally takes 1 s to reach the maximum speed for the
selected speed range. This time can be shortened proportionally by
defining smaller set value increments.

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maxon motor
Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
Adjusting set values via PWM control
Instead of an analog voltage, a PWM signal with a fixed frequency and ampli-
tude can be used to adjust the speed set value.
The desired change in the set value is achieved by variation of the duty cycle
in the range 0…100%. Both the amplitude and the duty cycle have an influ-
ence on the resulting speed. The mean value of the applied PWM voltage
corresponds to the analog input signal for the speed set value.
Nominal value amplitude PWM set value 0…5 V
Max. value amplitude PWM set value -55…+55 V
Frequency range PWM set value 500 Hz…20 kHz
Modulation PWM set value 0…100%
Continuous overvoltage protection -55…+55 V
Examples:
motor type: 1 pole pair
speed range: 500...20‘000 min-1
>@
>@

minminmax
9.4
1.0 nnn
V
VV
nset 
»
¼
º
«
¬
ª

PWM cycle 1: 33 % PWM @ 0 V … 12 V à4.0 V à16'020 rpm
t [µs]
Voltage [V]
0
2.5
5
7.5
10
12.5
-2.5
20 40 60 80 100 120 140 160 180 200 220 240 260 280 300
PWM cycle 1
PWM cycle 2
PWM cycle 3
PWM cycle 4
PWM cycle 5
PWM cycle 2: 60 % PWM @ 0 V … 10 V à6 V limited to 5 V (max. set value voltage) à20'000 rpm
PWM cycle 5: 90 % PWM @ 0 V … 2.5 V à2.25 V à9'056 rpm
PWM cycle 4: 50 % PWM @ 0 V … 5 V à2.5 V à10'051 rpm
PWM cycle 3: 75 % PWM @ -2.5 V … 7.5 V à5.0 V à20'000 rpm

maxon motor
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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
5.1.3 «Enable»
The «Enable» input enables or disables the power stage.
If a voltage higher than 2.4 V is applied to the «Enable» input, the amplifier is
activated (Enable). A speed ramp will be performed during acceleration.
Enable Input voltage > 2.4 V Motor shaft running
If the input is not connected (floating) or ground potential is applied to the
«Enable» input, the power stage is high impedant and the motor shaft free-
wheels and slows down (Disable).
Disable Input not connected (floating)
Input set to Gnd
Input voltage < 0.8 V
Power stage switched off
The «Enable» input is protected against overvoltage.
Enable Pin number [22] «Enable»
Input voltage range 0 ... +5 V
Input impedance 100 kΩ (in range 0 ... +5 V)
Continuous overvoltage protection -55 ... +55 V
Delay time max. 40 ms
5.1.4 «Direction»
The «Direction» input determines the rotational direction of the motor shaft.
When the level changes, the motor shaft slows down with a ramp to standstill,
and accelerates with a speed ramp in the opposite direction, until the target
speed is reached again.
If the input is not connected (floating) or ground potential is applied to the
«Direction» input, the motor shaft runs clockwise (CW).
CW Input not connected (floating)
Input set to Gnd
Input voltage < 0.8 V
Clockwise (CW)
If a voltage higher than 2.4 V is applied to the «Direction» input, the motor
shaft runs counter-clockwise (CCW).
CCW Input voltage > 2.4 V Counter-clockwise (CCW)
The «Direction» input is protected against overvoltage.
Direction Pin number [23] «Direction»
Input voltage range 0 ... +5 V
Input impedance 100 kΩ (in range 0 ... +5 V)
Continuous overvoltage protection -55 ... +55 V
Delay time max. 40 ms

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maxon motor
Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
5.1.5 «Set current limit»
The «Set current limit» input is used for setting the continuous output current
limitation in the range of 0.5...10 A.
The current set at the input «Set current limit» will stay available for an indefi-
nite period of time.
Note
ÖThe limiting value should be below the rated motor current (max. continu-
ous current) as shown on the motor data sheet (corresponds to line 6 in
maxon catalog).
Set value current Pin number [25] «Set current limit»
Referenced to Ground Pin number [24] «Gnd»
To parameterize the preferred current limiting value, an external resistor (at
least 62.5 mW) between current limiting input «Set current limit» Pin [25] and
ground «Gnd» Pin [24] must be added.
Current limit value Resistance value (E24 series)
10 A input floating
9 A 220 kΩ
8 A 91 kΩ
7 A 56 kΩ
6 A 36 kΩ
5 A 24 kΩ
4 A 16 kΩ
3 A 10.0 kΩ
2 A 5.6 kΩ
1 A 2.7 kΩ
0.5 A 1.2 kΩ
5.1.6 «Hall sensor 1», «Hall sensor 2», «Hall sensor 3»
Hall sensors are needed for detecting the rotor position and the actual speed.
The Hall sensor inputs are protected against overvoltage.
Hall sensor 1 Pin number [13] «Hall sensor 1»
Hall sensor 2 Pin number [15] «Hall sensor 2»
Hall sensor 3 Pin number [17] «Hall sensor 3»
Input voltage range 0 ... +5 V
Input impedance 22 kΩ pull-up resistor to 5 V
Voltage level «low» max. 0.8 V
Voltage level «high» min. 2.4 V
Continuous overvoltage protection -30 ... +30 V
Suitable for Hall sensor IC‘s with Schmitt-Trigger behavior and open collector
or push-pull outputs.

maxon motor
12 maxon motor control
1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
5.2 Outputs
5.2.1 +5 VDC output voltage «VCC Hall»
An internal auxiliary voltage of +5 VDC is provided for:
ÖHall sensor supply voltage «VCC Hall»
ÖFor external set value potentiometer (recommended value: 10 kΩ)
ÖGating the signals: «Enable» and «Direction»
The output is protected against continuous short circuit.
+5 VDC output voltage Pin number [11] «VCC Hall»
Referenced to Ground Pin number [14] «Gnd»
Output voltage +5 VDC ± 5 %
Max. output current 35 mA
5.2.2 Motor speed monitor «Monitor n»
The «Monitor n» output gives information on the actual speed of the motor
shaft. The actual speed is available as a digital frequency signal (High/Low).
The output «Monitor n» is protected against continuous short circuit.
Motor speed monitor Pin number [18] «Monitor n»
Output voltage range 0 ... +5 V
Output impedance 47 kΩ
Known values
Ö Number of pole pairs of motor zpol
Ö Frequency at «Monitor n» output [Hz] respectively Speed n [rpm]
Sought value
Ö Frequency at «Monitor n» [Hz]
Sought value
Ö Speed n [rpm]
Solution
>@
Hz
zn
fpol
nMonitor 20

Solution
>@
1
min
20 

pol
nMonitor
z
f
n

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maxon motor
Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
5.2.3 Status indication «Ready»
The «Ready» output can be used to report the state of operational readiness
or a fault condition to a master control unit.
In normal cases (no fault) the output is switched to 5V.
Ready (no fault) 5 V
In case of a fault the output is switched to Ground.
Fault (not ready) 0 V (Gnd)
Possible reasons for a fault message:
ÖUndervoltage
Fault message occurs in case supply voltage +VCC < 6 VDC.
To reset the fault condition the amplifier must be disabled and the supply
voltage +VCC must be higher than 6 VDC.
ÖOvervoltage
Fault message occurs in case supply voltage +VCC > 56 VDC.
To reset the fault condition the amplifier must be disabled and the supply
voltage +VCC must be lower than 54 VDC.
ÖThermal overload
Fault message occurs in case power stage temperature is > 100°C.
To reset the fault condition the amplifier must be disabled and the power
stage temperature must fall below 80°C
ÖInvalid Hall sensor signals
The amplifier recognizes invalid conditions at the Hall sensor inputs.
To reset the fault condition the amplifier must be disabled and the Hall
sensors must be wired correctly.
The output «Ready» is protected against continuous short circuit.
Status indication Pin number [19] «Ready»
Output voltage range 0 ... +5 V
Output resistance 47 kΩ

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
6 Protective functions
6.1 Undervoltage protection
The power stage will be disabled in case the supply voltage +VCC drops below
6 VDC.
To reset the fault condition the amplifier must be disabled and the supply
voltage +VCC must be higher than 6 VDC.
6.2 Overvoltage protection
The power stage will be disabled in case the supply voltage +VCC rises above
56 VDC.
To reset the fault condition the amplifier must be disabled and the supply
voltage +VCC must be lower than 54 VDC.
6.3 Thermal overload protection
The power stage will be disabled in case the power stage temperature ex-
ceeds 100°C.
To reset the fault condition the amplifier must be disabled and the power
stage temperature must fall below 80°C.
6.4 Invalid Hall sensor signals
The power stage will be disabled in case invalid conditions at the Hall sensor
inputs occur.
To reset the fault condition the amplifier must be disabled and the Hall sen-
sors must be wired correctly.
6.5 Blockage protection
If the motor shaft is blocked, the current limit is set to the predetermined va-
lue at the«Set current limit» input.
Note
ÖNo fault message occurs at the «Ready» output if blockage protection is
active.
6.6 Current limitation
The motor current will be limited to 0.5…10 A depending on the value applied
to the input «Set current limit» by means of a cycle-to-cycle limitation (see
chapter «5.1.5 «Set current limit»»).
Note
ÖNo fault message occurs at the «Ready» output if current limitation is
active.

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maxon motor
Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
7 Block Diagram
Each pin is limited
to 3A continuous.
Connect both pins!
Power
Driver
MOSFET
Full
Bridge
Supply
Ready
+5V
Micro Controller
+5V
Motor winding 1
Motor winding 2
Motor winding 3
Gnd
+5V
NTC
DigIN2
21
26
19
24
1
Set value speed
+5V
Direction
23
+5V
Enable
22
7
9
+5V
Vin
+V 10...50 VDC
CC
Power Gnd
+5V
Vin
+5V +5V
Hallsensor 1
13
+5V +5V
Hallsensor 2
15
+5V +5V
Hallsensor 3
17
DigIN1
20
+5V
+5V
Gnd
14
V Hall
CC
11
+5V
+5V
25
Set current limit
+5V
+V 10...50 VDC
CC
8
10
Power Gnd
Motor winding 1
Motor winding 2
Motor winding 3
2
3
4
5
6
Current
detect
Do not connect
12
18
16
Gnd
Monitor n
DEC MODULE 50/5

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
8 Dimensional Drawing
Dimensions in [mm]
9 Accessories (not included in delivery)
maxon motor order number Designation
370652 DEC Module Evaluation Board
10 Appendix «Motherboard Design Guide»
10.1 Introduction
The present documentation «Motherboard Design Guide» contains helpful
information on the integration of the DEC Modules 50/5 into printed circuit
boards. Contained therein are recommendations for possibly needed 3rd par-
ty components, suggestions on layout, terminal assignment as well as circuit
samples.
Warning:
aDevelopment of printed circuits boards requires specific qualifications
and should only be performed by experienced electronics engineers.
The present brief instruction is intended to serve as supporting aid only
and does not claim completeness. Upon request, maxon motor ag is
glad to assist and to offer customer-specific motherboard designs.
10.2 External components
10.2.1 Pin socket
The connector arrays used in the DEC Module 50/5 permit two possible types
of connections. The module can either be mounted on pin socket or soldered
directly into the printed circuit board.
Pin socket recommendations:
Specifications:
– Pin socket vertical, single row, mates with pin header 0.63 x 0.63 mm,
pitch 2.54 mm, 3 A, contact material gold or brass
Pin socket 8 poles, single row:
– Preci-Dip 801-87-008-10-001101
– Samtec SSW-108-01-F-S
– Harwin M20-7820842
Pin socket 9 poles, double row
– Preci-Dip 803-87-018-10-001101
– Samtec SSW-109-01-F-D
– Harwin M20-7830942

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Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
10.2.2 Supply voltage
To protect the DEC module from damage an external fuse, a TVS-diode and
a capacitor in the power supply voltage line are recommended.
+
C1
220u/63V
FU1
7A
D1
SMBJ54A
+VSupply +Vcc Module1
Gnd Gnd
Fuse FU1:
To protect against reverse polarity, place a fuse at the entry of the power
supply. Together with the TVS-diode, the fuse breaks an occurring reverse
current.
Recommendation for the fuse:
– Littlefuse 154 Series OMNI-BLOK® fuse holder with SMD NANO2 ® Fuse
installed:
154007. 7 A very fast-acting
TVS-Diode D1:
To protect against overvoltage due to supply transients or the motor braking
energy, connect a transient voltage suppressor diode to the power supply
voltage.
Recommendations for the TVS-diode:
– Vishay SMBJ54A
UR=54 V, UBR = 60.0...66.3 V @1mA, UC = 87.1 V @ 6.9 A
– Diotec P6SMBJ54A
UR=54 V, UBR = 60.0...66.6 V @1mA, UC = 87.1 V @ 6.9 A
Capacitor C1:
An external capacitor is not mandatory for the function of the DEC module.
To reduce the voltage ripple and to buffer the back-fed energy a electrolyte
capacitor can be connect to the power supply voltage.
Recommendations for the electrolyte capacitor:
– Panasonic EEUFC1J221S
Rated voltage 63V, Capacitance 220 mF, Ripple Current 1285 mA
– Rubycon 63ZL220M10X23
Rated voltage 63V, Capacitance 220 mF, Ripple Current 1120 mA
– Nichicon UPM1J221MHD
Rated voltage 63V, Capacitance 220 mF, Ripple Current 1300 mA
10.2.3 Motor phase
The DEC Module 50/5 has no built-in chokes.
For most motors and applications no additional motor chokes are neces-
sary. In case of high power supply voltage +VCC and a motor with very low
inductance the current ripple will become too high. This causes unnecessary
motor heating and unstable control behavior.

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
The minimum inductance of each choke can be calculated with the formula
below:
¸
¸
¹
·
¨
¨
©
§

t Motor
NPWM
CC
Phase L
If
V
L3.0
62
1
LPhase [H] Additional external inductance per phase
VCC [V] Power supply voltage +VCC
f PWM [Hz] PWM frequency = 46 800 Hz
IN [A] Nominal motor current
LMotor [H] Terminal inductance phase to phase of the motor
If the result of the calculation is negative, no additional chokes are necessary.
Nevertheless, the use of chokes in combination with additional filter compon-
ents can be useful to reduce the emission of electromagnetic interference.
An additional choke must feature electromagnetic shielding, a high saturation
current, minimal losses, and a nominal current greater than the continuous
current of the motor. The below wiring example refers to an additional in-
ductance of 22 μH. If a different additional inductance is required, also the
filter components must be adapted accordingly.
Should you need further help with the filter design, contact maxon Support at
http://support.maxonmotor.com.
L1
22uH
J2/31Motorwinding 1
10GND
Motorwinding 1
560R
150p
68p
2Motorwinding 1
9GND
DEC Module 50/5 Motherboard (customer-specific) Motor
Wiring of Motor Winding 1 (analogously valid also for Motor Windings 2 & 3)
Recommendations for the motor chokes:
– Würth Elektronik WE-PD-XXL 7447709220
LN = 22 μH, RDC = 23.3 mΩ, IDC = 5.3 A, Isat = 6.5 A, shielded
– Coiltronics DR127-220
LN = 22 μH, RDC = 39.1 mΩ, IDC = 4.0 A, Isat = 7.6 A, shielded
Würth Elektronik WE-PD-XXL 7447709150
LN = 15 μH, RDC = 21 mΩ, IDC = 6.5 A, Isat = 8.0 A, shielded
– Sumida CDRH129RNP-150MC
LN = 15 μH, RDC = 16 mΩ, IDC = 6.0 A, Isat > 6.0 A, shielded
– Coiltronics DR127-150
LN = 15 μH, RDC = 25 mΩ, IDC = 5.0 A, Isat = 9.7 A, shielded
– Bourns SRR1280-150M
LN = 15 μH, RDC = 28 mΩ, IDC = 5.2 A, Isat > 5.2 A, shielded
– Würth Elektronik WE-PD-XL 744770115
LN = 15 μH, RDC = 24 mΩ, IDC = 5.0 A, Isat = 6.0 A, shielded
– Sumida CDR127/LDNP-150M
LN = 15 μH, RDC = 20 mΩ, IDC = 5.7 A, Isat > 5.7 A, shielded

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Operating Instructions 1-Q-EC Amplifier DEC Module 50/5
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
10.3 Design rules
To help customers designing an application specific motherboard and for
correct and save function of the DEC Module 50/5 these rules should be
followed.
10.3.1 Ground
The ground (Gnd) pins of the DEC Module are internally connected (same
electrical potential). It is common practice to place a ground plane on the mo-
therboard and it is necessary to connect pins [9], [10], [14], [16] and [24] with
thick tracks to the power supply voltage ground
Pin Signals Description
9 Gnd Ground
10 Gnd Ground
14 Gnd Ground
16 Gnd Ground
24 Gnd Ground
If ground safety earth is mandatory, connect the ground plane over several
parallel capacitors to the ground safety earth. Ceramic chip capacitors with
47 nF and 100 V are suggested.
10.3.2 Layout
Motherboard layouts for DEC Module 50/5 should follow these rules:
– Pins [7] and [8] +VCC: Use thick track to connect to the fuse.
– Pins [9], [10], [14], [16] and [24]: Use thick tracks to connect to supply
voltage‘s ground (Gnd).
– The width and copper plating thickness of the power supply voltage and
motor winding traces depend on the maximum current expected in the
application. A minimum of 75 mil width at 70 μm thickness is recommen-
ded.
10.4 THT footprint
Top view Dimensions in [mm]
10.5 Pin description
See chapter «3 Pin assignment DEC Module 50/5»
10.6 Technical data
See chapter «2 Technical data»
10.7 Dimensional drawing
See chapter «8 Dimensional drawing»

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1-Q-EC Amplifier DEC Module 50/5 Operating Instructions
April 2015 Edition / document number 1094861_PDF_E - 05 / subject to change
10.8 Schematic examples
10.8.1 Minimum external wiring
Power supply (6...50 VDC); EC motor with Hall sensors; External set value
speed potentiometer (10 kΩ); Enable switch
Configuration: Speed controller (closed loop); Speed range 500...20 000 rpm.
Vcc Hall
P1
10k
Gnd
Motor Winding 1
Motor Winding 2
Motor Winding 3
+Vcc 6-50VDC
Gnd
Vcc Hall
Hall sensor 1
Hall sensor 2
Hall sensor 3
FU1
7A
D1
SMBJ54A
Gnd
Gnd
Vcc Hall
speed range 500-20'000rpm
Vcc Hall
Gnd
S1
SW-SPST
W1
2
+Vcc
8
W1
1
W2
3
W2
4
W3
5
W3
6
+Vcc
7
Gnd
9
Hall sensor 3
17 Gnd
16 Hall sensor 2
15 Gnd
14 Hall sensor 1
13 Do not connect
12 Vcc Hall
11 Gnd
10
Monitorn
18
Set value speed 26
Set current limit 25
Gnd 24
Direction 23
Enable 22
DigIn2 21
DigIN1 20
Ready 19
IC1
DEC Module 50/5
10.8.2 Low Voltage +5V operation
Alternatively, the DEC Module 50/5 can be operated with a supply voltage of
+5 VDC only. Thereby, the external +5 VDC power source must be connected
to pins [7] and [8] «+VCC» and, in addition, also to pin [11] «VCC Hall». This
wiring makes sure that the internally needed +5VDC supply voltage is fed
from external.
Warning
a The supply voltage must be between +4.75 VDC and +5.25 VDC. Voltages
above +5.5 VDC or swapping poles will destroy the unit.
C1
10uF
Vcc Hall
P1
10k
Gnd
Motor Winding 1
Motor Winding 2
Motor Winding 3
+Vcc 5VDC
Gnd
Vcc Hall
Hall sensor 1
Hall sensor 2
Hall sensor 3
FU1
7A
Gnd
Gnd
Vcc Hall
speed range 500-20'000rpm
Vcc Hall
Gnd
S1
SW-SPST
W1
2
+Vcc
8
W1
1
W2
3
W2
4
W3
5
W3
6
+Vcc
7
Gnd
9
Hall sensor 3
17 Gnd
16 Hall sensor 2
15 Gnd
14 Hall sensor 1
13 Do not connect
12 Vcc Hall
11 Gnd
10
Monitorn
18
Set value speed 26
Set current limit 25
Gnd 24
Direction 23
Enable 22
DigIn2 21
DigIN1 20
Ready 19
IC1
DEC Module 50/5