NPM AD1231 User manual

YA7159-1/3
Stepper Motor Driver
Nippon Pulse Motor Co., Ltd

Stepper Motor Driver AD1231 YA7159-1/3
- C1 -
Table of Contents
1. Product Warranty .................................................................................................................................... 1
1-1. In the case of purchase from a supplier other than NPM................................................ 1
1-2. Warranty period............................................................................................................... 1
1-3. Warranty scope................................................................................................................ 1
1-4........................................................................................................................................... 1
1-5........................................................................................................................................... 1
1-6........................................................................................................................................... 1
2. Features.................................................................................................................................................... 2
3. Specifications .......................................................................................................................................... 3
4. Connection............................................................................................................................................... 7
5. System features..................................................................................................................................... 10
5-1. Block diagram................................................................................................................ 10
5-2. SW1 setting.................................................................................................................... 10
5-3. SW2 setting.................................................................................................................... 12
5-4. SW3 setting.................................................................................................................... 13
5-5. LED display.................................................................................................................... 13
5-6. Default setting ............................................................................................................... 13
6. Handling precautions............................................................................................................................ 14
7. Accessories............................................................................................................................................ 14
8. External dimensions ............................................................................................................................. 15
8-1. External dimensions including the heatsink................................................................. 15
8-2. Board layout .................................................................................................................. 15

Stepper Motor Driver AD1231 YA7159-1/3
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1. Product Warranty
1-1. In the case of purchase from a supplier other than NPM
Regarding the product warranty in the case of purchase from a supplier other than NPM, please contact to
the supplier
1-2. Warranty period
The warranty period is one year from the date of the delivery to an assigned place.
1-3. Warranty scope
If defects are found in the product during the warranty period under normal use following this document,
NPM will repair the product without charge. However, the following cases are not covered by the
warranty and free repair does not apply to the product even during the warranty period.
- The products are modified or repaired by anyone other than NPM or an authorized person by NPM.
- The defect results from falling of the product after delivery or mishandling in transit.
- -Wearing of components, natural deterioration or fatigue (motor axle bearing, gear, grease, cables,
etc.)
- The defect results from any use other than original use.
- The product has been subjected to natural disaster or force majeure such as fire, earthquake,
lightning strike, wind and flood, salt, and electrical surges.
- The defects or damage results from the cause other than the fault of NPM.
Note 1) Only if the product with defects is carried to the specific place to repair, NPM will repair the
product. NPM will not provide on-site repair.
Note 2) The warranty period of the repaired product is not extended beyond the warranty period of the
product before the failure. It is the same as the warranty product of the product before the repair.
Note 3) This warranty covers the product. It does not cover the detriments caused by the product's
defects, etc.
Note 4) A replacement may be provided instead of a repair at the direction of NPM.
1-4.
This documents aims to describe the detail of the function of the product and it does not warrant fitness for
a particular purpose of the customers.
The examples of application and circuit diagram in this manual are described for your reference. Please
confirm the feature and the safety of device or equipment before use.
1-5.
Please do not use this product for the following use in principle.
If you use the product for the following use, please contact our sales department.
- Any equipment that may require high reliability or safety, such as nuclear facility, electricity or gas
supply system, transportation facilities, vehicle, various safety system, medical equipment, etc.
- Any equipment that may directly affect human survival or property
- Usage under conditions or circumstances that are not specified in the brochure, manual, etc.
1-6.
When this product is used in any equipment where faults or malfunctions may directly affect human
survival or property, please secure high reliability and security with redundancy design, etc.

Stepper Motor Driver AD1231 YA7159-1/3
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2. Features
AD1231 is a constant current stepper motor driver of 2 phase unipolar type.
- It drives a unipolar motor with bifilar coil windings.
- Output current can be set by a rotary switch easily.
- It has auto current down function to prevent heat generation during the motor stopping.
- Excitation method can be selected from 2-phase to 4W1-2 phase excitation by a switch. It can drive a
motor with low vibration.
- It fits for an experiment or evaluation as well as for being embedded in devices.

Stepper Motor Driver AD1231 YA7159-1/3
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3. Specifications
Product Name : Stepper Motor Driver Model : AD1231
Electrical
specifications Input voltage Control power : DC12V-10% to DC24V+10% Capacity: 3[A], with fuse.
Control method Unipolar constant current
Excitation method 2 phase (FULL), 1-2 phase (HALF), W1-2 phase (1/4),
2W1-2 phase (1/8), 4W1-2 phase (1/16)
Output current 0.13A (MIN) to 2.0A (MAX) / phase
Selectable by the rotary switch.
Auto current down
(ACD) control *1 Current down operation starts in approximately 0.1s after pulse input stops and lowers the output current automatically.
Selectable from 25%, 50% or 75% of the current by using the
switch.
Input interface Pins 1 to 4 of CN2:
Photocoupler (Toshiba TLP112 or equivalent) *4
Built-in 330 ohm resistor
Forward voltage 1.42V (TYP)
Recommended forward current IF:11mA
(Operation forward current IF:10 to 20mA)
Maximum response frequency 160kpps
(Input voltage 5V, duty rate 50%)
Pins 5 to 8 of CN2 :
Photocoupler (Toshiba TLP281 or equivalent) *4
Built-in 330 ohm resistor
Forward voltage 1.15V (TYP)
Recommended forward current IF:12mA
(Operation forward current IF:5 to 50mA)
Output interface Pins 9 to 10 of CN2:
Photocoupler (Toshiba TLP281 or equivalent) *4
Recommended collector current Ic: 10mA
(Saturation voltage between collector and emitter : 0.7V)
CW/CCW
command pulse One of the following methods can be selected by the switch. *2 1. Two pulse method (CW/CCW)
2. One pulse method (CLK/DIR)
Photocoupler ON: CCW
Photocoupler OFF : CW
MOT/OFF signals Motor excitation signal
Photocoupler ON : Excitation OFF
Photocoupler OFF : Excitation ON
ACD/OFF signals Auto current down signal
Photocoupler ON : ACD_OFF
Photocoupler OFF : ACD_ON
EORG output
signals Display signal of 2 phase excitation condition *3 Photocoupler ON : 2 phase excitation
Photocoupler OFF: other than 2 phase excitation

Stepper Motor Driver AD1231 YA7159-1/3
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Environmental
Condition Operating temperature range 0 to 50 °C
Operating humidity
range 0 to 80%RH (No condensation)
Storage
temperature range -10 to 60 °C
Others External
dimensions 60(W) x 50(D) x 30(H) [mm] (including heatsink)
Weight 43g (including heatsink)
Cooling system Natural cooling
* Photocoupler ON Current flows to the input side of photocoupler.
Photocoupler OFF Current does not flow to the input side of photocoupler.

Stepper Motor Driver AD1231 YA7159-1/3
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*1 Auto current down
Auto current down is a function to prevent heat generation by adjusting to set lower current after pulse
signals stop.
This driver allows to lower the current to 25%, 50% and 75% of the normal current to drive the motor.
*2 One pulse mode and two pulse mode
One pulse mode
It is a method that the rotation direction CW/CCW is decided by whether the DIR photocoupler is
ON or OFF when pulses are input to the CLK terminal.
Two pulse mode
It is a method that the rotation direction CW/CCW is decided by whether the pulse is input to the
CW terminal or that CCW terminal.
In the case that CLK(+) and
DIR(+) are connected to +5V.
In the case that CW(+) and
CCW(+) are connected to +5V.
CCW(-)
Motor stops
CCW
rotation
Motor stops
CW
rotation
Rotation
direction
CW(-)
Longer than 2 μs
OFF
ON
OFF
ON
+5V
C
W
(+)
C
W
(
-
)
CCW
(+)
CCW
(
-
)
AD1231
DIR(-
)
Motor stopsCCW
rotation
Motor stopsCW
rotation
Rotation
direction
CLK(-)
Longer
than
1μs
Longer
than
1μs
OFF
ON
OFF
ON
+5V
CLK(+)
CLK(
-
)
DIR(+)
DIR(
-
)
AD1231

Stepper Motor Driver AD1231 YA7159-1/3
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*3 EORG photocoupler ON/OFF condition in the following excitation methods
The EORG photocoupler is ON in the 2 phase excitation method (Both Aand B phases are excited by
the same current.)
The timing in each excitation method is as follows.
2相励磁
EORG(-)
制御電源ON
入力パルス
1-2相励磁
入力パルス
W1-2相励磁
入力パルス
2W1-2相励磁
入力パルス
4W1-2相励磁
入力パルス
+5V
CLK(+)
CLK(-)
EORG(+)
EORG(-)
AD1231側
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
EORG(-)
EORG(-)
EORG(-)
EORG(-)
CLK(+)とEORG(+)を+5V接続した場合
*4 Components for use
Electronic components for use may be changed to equivalents without prior notice. In that case,
constants of surrounding devices, such as resistors, may be changed in accordance with the
specification.
In the case that CLK(+) and EORG(+) are connected to +5V.
AD1231
Control power ON
Input pulse
Input pulse
Input pulse
Input pulse
Input pulse
EORG(-)
EORG(-)
EORG(-)
EORG(-)
EORG(-)
2W1
-
2 phase excitation
4W1
-
2 phase excitation
W1-2 phase excitation
1-2 phase excitation
2 phase excitation

Stepper Motor Driver AD1231 YA7159-1/3
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4. Connection
Connector No. Pin No. Signal name Remarks
CN1
(Power supply) 1 PWR+ Control power DC+24V
2 PWR- Control power GND
CN2
(I/O) 1 CW+(CLK+) CW signals in the two pulse method (CW/CCW) When the photocoupler turns ON to OFF, the step motion is
made in the CW direction.
CLK signal in the one pulse method (CLK/DIR)
When the photocoupler turns ON to OFF, the step motion is
made.
2 CW-(CLK-)
3 CCW+(DIR+) CCW signals in the two pulse method (CW/CCW)
When the photocoupler turns ON to OFF, the step motion is
made in the CCW direction.
DIR signals in the one pulse method (CLK/DIR)
Photocoupler ON : CCW direction
Photocoupler OFF : CW direction
4 CCW-(DIR-)
5 MTR/OFF+ Motor excitation ON/OFF signals
Photocoupler ON : Excitation OFF
Photocoupler OFF : Excitation ON
6 MTR/OFF-
7 ACD/OFF+ Auto current down ON/OFF signals
Photocoupler ON : ACD_OFF
Photocoupler OFF : ACD_ON
8 ACD/OFF-
9 EORG+ Output signal to display 2 phase excitation condition
Photocoupler ON : 2 phase excitation
Photocoupler OFF : Other than 2 phase excitation
10 EORG-
CN3
(Motor) 1 COM1 Motor A phase common connection
2 COM2 Motor B phase common connection
3AMotor A phase connection
4
_
A Motor
_
A phase connection
5 B Motor B phase connection
6
_
B Motor
_
B phase connection

Stepper Motor Driver AD1231 YA7159-1/3
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Connection example of CN2 Input/output interface
OFF
ON
User controller AD1231
When photocoupler is ON,
the LED lights
Input signal
Forward current IF
330
5V
330
5V
GND
Pin 9 of CN2
Pin
10
of CN2
Pins 2, 4, 6 and 8
of CN2
Pins 1, 3, 5 and 7
of CN2
Collector current IC

Stepper Motor Driver AD1231 YA7159-1/3
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Typical example of connection with driver
ドライバAD1231
1
2
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
SW1
SW3
SW2
DC+24V
電源
+
-
Motor
VR1
2パルス方式と1パルス方式の変更
モータの励磁方式の変更
駆動電流のモード切替え
カレントダウン時の
駆動電流設定
駆動電流の微調整
ロータをCW回転で駆動電流上昇
+5V
ユーザコントローラ
PWR+
PWR-
+
CW(CLK)
-
+
CCW(DIR)
-
+
MTR/OFF
-
+
ACD/OFF
-
+
EORG
-
COM1
COM2
A
A
B
B
SW1
CN1
CN2
CN3
AD1231 driver
DC+24V
Power
Switch between
two pulse and one pulse method
Change motor excitation method
Switch driving current
Set driving current in current down
Fine adjustment of the driving current
(Driving current rises when the rotor is
rotated in the CW direction.)
User controller

Stepper Motor Driver AD1231 YA7159-1/3
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5. System features
5-1. Block diagram
Fuse
5V
1PWR+
2PWR-
CN1
IL-G-2P-S3T2-SA
POWER
VM
INPUT OUTPUT
330
330
330
DC-DC
フィルタ
フィルタ
フィルタ
1パルス‐2パルス
切り替え
モーター
ドライバＩＣ
スイッチ
5V
5V
5V
5V
スイッチ
1CW+/CLK+
2CW-/CLK-
3CCW+/DIR+
4CCW-/DIR-
5MOT_OFF+
6MOT_OFF-
7ACD_OFF+
8ACD_OFF-
9EORG+
10 EORG-
CN2
IL-G-10P-S3T2-SA
フィルタ
5V ロジック部
330
1
COM
2
COM
3
A
4
/A
5
B
6
/B
CN3
IL-G-6P-S3T2-SA
VM A
/B
/A
B
M
COM
COM
Motor
5-2. SW1 setting
SW1 can switch between the two pulse (CW, CCW) mode or the one pulse (CLK, DIR) mode, and also
change the motor excitation method.
You can switch between the two pulse (CW, CCW) mode or the one pulse (CLK, DIR) mode by switching
SW1-1.
SW1-1 Setting
ON Two pulse (CW, CCW) mode
OFF One pulse (CLK, DIR) mode
to Driver
分解能
設定
Resolution
setting
VCC
SW1
Switch
between
1 pulse or
2 pulse
Switch
Logic
circuit
Switch
Motor
Driver
IC
Filter
Filter
Filter
Filter
Pulse input
mode setting

Stepper Motor Driver AD1231 YA7159-1/3
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By setting SW1-2 to SW1-4, you can change the motor excitation method.
SW1-2 SW1-3 SW1-4 Setting
ON ON ON 2 phase excitation 1/1 (Full) step *
OFF ON ON 2 phase excitation 1/1 (Full) step *
ON OFF ON 1-2 phase excitation 1/2 (Half) step *
OFF OFF ON 1-2 phase excitation 1/2 (Half) step *
ON ON OFF W1-2 phase excitation 1/4 step
OFF ON OFF 2W1-2 phase excitation 1/8 step
ON OFF OFF 4W1-2 phase excitation 1/16 step
OFF OFF OFF Sleep Mode, internal logic :HOLD
* In 2 phase excitation and 1-2 phase excitation, step angles become the same both when SW1-2 is ON
and OFF. However, by switching SW1-2, the excitation become as follows.
2 phase excitation
When SW1-2 is ON, the excitation is by 70% of the setting current.
When SW1-2 is OFF, the excitation is by the setting current.
In 1-2 phase excitation
When SW1-2 is ON, torque ripple in the 1 phase and 2 phase excitation becomes small. You can use
this setting when you want to eliminate vibration, noise, etc.
When SW1-2 is OFF, torque ripple becomes large. However, the amount of torque becomes large.
The amount of drive current
when SW1-2 is OFF.
2-phase excitation
(SW1-3:ON, SW1-4:ON) 1-2-phase excitation (SW1-3:OFF, SW1-4:ON)
The amount of drive current
when SW1-2 is ON.

Stepper Motor Driver AD1231 YA7159-1/3
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5-3. SW2 setting
SW2 (rotary switch) can switch the driving current.
SW2 setting value :
SW2 setting value Current value（A）
0 0.13
1 0.26
2 0.39
3 0.52
4 0.65
5 0.77
6 0.90
7 1.02
8 1.16
9 1.28
A 1.40
B 1.52
C 1.64
D 1.76
E 1.88
F 2.00
Additionally, variable resistor VR1 allows you to set a finer value.
The drive current is adjusted as follows:
1. For preparation, change the SW2 setting to a value that is close to the target current value Io[A]
according to the above table.
2. Input the control power from the CN1. Turn off the ACD function.
3. Measure the voltage VREF[V] between TP1 and TP10 (GND).(Please be careful so that probes may
not touch other surrounding checkpin terminals. It may cause short out. We recommend that you
clip probes on the terminals with power off and that measure the voltage without moving probes.) If
they touch other surrounding checkpin terminals, that may cause malfunction.
4. Change the variable register VR1, so that VREF = Io×0.155.
(When you rotate the VR1 rotor in the CW direction, VREF rises. If VREF does not change, change
the SW2 setting and adjust the VR1 again.)
As described above, you can set a finer value of current.
At default, the VR1 is adjusted so that the current value is 2.0A when SW2 value is set in F on the scale.
By rotating the VR1, you can set current finely between 0.08 to 2.00 [A].
(Please note that more than 2A current can flow in some products.)

Stepper Motor Driver AD1231 YA7159-1/3
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5-4. SW3 setting
When auto current down setting is selected, SW1 can set the driving current in the current down setting.
SW3 setting：
SW3-1 SW3-2 SW3-3 Driving
current Setting
ON - - 75%
- ON - 50%
- - ON 25%
When you change SW3, all SW1-1 to 3 turn OFF temporarily and 100% of the driving current flows. Please
note that the motor may produce heat if this condition continues for a long time.
Motor driving current when you change the setting of SW3 with auto current down
5-5. LED display
The LEDs （D3 and D4）lights under the following conditions.
D3 : It lights green using +5V power supply generated by the DC-DC when the control power is ON.
D4 : It lights red when the motor coil connected with the driver becomes short or open while the motor is
running.
5-6. Default setting
SW1：bit1：OFF bit2：OFF bit3：OFF bit4：OFF 1 pulse method / Sleep Mode internal logic HOLD
SW2：Setting 0 Driving current value 0.13A
SW3：Setting 2 To lower the current value to 50% after input pulse stops in the case that the ACD
function is selected.
Driving current
SW3-1 setting SW3-2 setting SW3-3 setting
Other than set value Other than set value

Stepper Motor Driver AD1231 YA7159-1/3
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6. Handling precautions
6-1. This driver is a natural cooling type. Put this product in well-ventilated place as possible and space
more than 10mm out around this driver.
6-2. Do not use in place with dust, oil mist, corrosive gas, etc. Additionally, remove dust periodically.
6-3. Do not put this driver in place with excessive vibration and shock directly
6-4. Make sure to keep the signal line (CN2), the power line (CN1) and the motor line (CN3) away from
one another to prevent noises.
6-5. If there are noise sources such as relays, high-pressure switching equipments or inverters, these
may cause induced and radiation noises mix in the signal lines or power lines and may cause
malfunctions. Make sure to keep the wires and driver from such noise source as possible.
6-6. Be careful to touch metal parts. It may result in injury on your finger by an angle of the metal.
6-7. Do not touch the board of this product while the power is supplied. When you move, wire, maintain
and inspect this product, power it off.
6-8. Be careful to touch the product while the power is supplied and just after the power turns off. The
product may be hot.
6-9. Keep this driver out of reach of children.
6-10. Store this driver in place within the predetermined range of temperature and humidity. Do not leave it
in place subject to direct sunlight.
6-11. Plug in the connectors closely. Do not insert and remove connectors with wet hands.
6-12. If smoking, abnormal smell or noise occur, shut down the power immediately.
7. Accessories
Connector for CN1 IL-G-2S-S3C2-SA(Japan Aviation Electronics Industry, Ltd) 1 pc
Connector for CN2 IL-G-10S-S3C2-SA (Japan Aviation Electronics Industry, Ltd) 1 pc
Connector for CN3 IL-G-6S-S3C2-SA(Japan Aviation Electronics Industry, Ltd) 1 pc
Contact for connectors IL-G-C2-SC-10000 (Japan Aviation Electronics Industry, Ltd) 18 pcs
Applicable wire : AWG22 to28
The above components are attached.
Use the following crimp tool for clamping contact.
CT150-1-ILG (Japan Aviation Electronics Industry, Ltd) Applicable wire : AWG26 to 28
CT150-1B-ILG (Japan Aviation Electronics Industry, Ltd) Applicable wire : AWG24 to 26
CT150-1C-ILG (Japan Aviation Electronics Industry, Ltd) Applicable wire : AWG22 to 24

Stepper Motor Driver AD1231 YA7159-1/3
- 15 -
8. External dimensions
8-1. External dimensions including the heatsink
Dimension tolerance : ±0.1
Unit : mm Thickness of heatsink: 1.5mm
8-2. Board layout

Stepper Motor Driver AD1231 YA7159-1/3
- 16 -
CAUTION The descriptions in this manual may be changed without prior notice to
improve performance or quality.
Nippon Pulse Motor Co., Ltd.
Head Office: No.16-13, 2-chome, Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
TEL: [phone] FAX: [phone]
Web: http://www.pulsemotor.com E-mail: [e-mail]
Issued in June 2012