Leadshine Technology EM532MINI User manual

User Manual
EM532MINI
Digital Microstep Drive
Revision 1.0
©2021 China Leadshine Technology Co., Ltd.
Address: 15-20/F, Block B, Nanshan I Valley, No.3185, Shahe West Road, Nanshan District,
Shenzhen, Guangdong, 518055, China
Tel: [phone] Fax: [phone]
Web: www.leadshine.com Sales: [e-mail]
Support: [e-mail]

EM532MINI Digital Stepper Drive User Manual
Notice
Read this manual carefully before any assembling and using. Incorrect handling of products in this manual can result
in injury and damage to persons and machinery. Strictly adhere to the technical information regarding installation
requirements.
This manual is not for use or disclosure outside of Leadshine except under permission. All rights are reserved. No part
of this manual shall be reproduced, stored in retrieval form, or transmitted by any means, electronic, mechanical,
photocopying, recording, or otherwise without approval from Leadshine. While every precaution has been taken in
the preparation of the book, Leadshine assumes no responsibility for errors or omissions. Neither is any liability
assumed for damages resulting from the use of the information contained herein.
This document is proprietary information of Leadshine that is furnished for customer use ONLY. Information in this
document is subject to change without notice and does not represent a commitment on the part of Leadshine.
Therefore, information contained in this manual may be updated from time-to-time due to product improvements,
etc., and may not conform in every respect to former issues.
Record of Revisions
Revision
Date
Description of Release
1.0
Sept, 2021
Initial Version

EM532MINI Digital Stepper Drive User Manual
Table of Contents
1. Introductions................................................................................................................................................................... 1
1.1 Features...................................................................................................................................................................1
1.2 Applications............................................................................................................................................................ 1
2. Specifications...................................................................................................................................................................1
2.1 Electrical Specifications......................................................................................................................................... 1
2.2 Environment............................................................................................................................................................2
2.3 Mechanical Specifications......................................................................................................................................2
2.4 Elimination of Heat.................................................................................................................................................2
3. Connection Pin Assignments and LED Indication...................................................................................................... 3
3.1 P1 - Control Connector and Fault Output.............................................................................................................. 3
3.2 P2 - Power Connector.............................................................................................................................................3
3.3 P3 - Motor Connector............................................................................................................................................. 4
3.4 Indicator Light........................................................................................................................................................ 4
4. Control Signal and Fault Output.................................................................................................................................. 4
4.1 Control Signal Connection..................................................................................................................................... 4
4.2 Fault output connection.......................................................................................................................................... 4
5. Motor Connection........................................................................................................................................................... 5
5.1 Connections of 4-lead Motor..................................................................................................................................5
5.2 Connections of 6-lead Motor..................................................................................................................................5
5.2.1 Half Coil Configuration...............................................................................................................................5
5.2.2 Full Coil Configuration............................................................................................................................... 6
5.3 Connections of 8-lead Motor..................................................................................................................................6
5.3.1 Series Connection........................................................................................................................................ 6
5.3.2 Parallel Connection......................................................................................................................................6
6. Power Supply Selection.................................................................................................................................................. 7
6.1 Regulated or Unregulated Power Supply............................................................................................................... 7
6.2 Power Supply Sharing............................................................................................................................................ 7
6.3 Selecting Supply Voltage........................................................................................................................................7
7.DIP Switch Configurations............................................................................................................................................. 8
7.1 Output Current Configuration (SW1-3).................................................................................................. 8
7.2 Idle Current Configuration (SW4).................................................................................................. 8
7.3 Micro Step Configuration (SW5-8).................................................................................................. 8
8. Wiring Notes....................................................................................................................................................................9
9. Typical Connection......................................................................................................................................................... 9
10. Sequence Chart of Control Signals........................................................................................................................... 10
11. Protection Functions................................................................................................................................................... 11
12. Troubleshooting...........................................................................................................................................................12
13. Warranty......................................................................................................................................................................13
14. Contact Us................................................................................................................................................................... 13

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1. Introductions
The EM532MINI is a digital stepper drive with simple design and easy setup. By implementing Leadshine advanced
stepper control technology, this stepper drive is able to power 2-phase and 4 phase stepper motors smoothly with
optimal torque and low motor heating & noise. Its operating voltage is 18-50VDC and it can output up to 3.2A current.
All the micro step and output current are done via DIP switches. Therefore, the EM532MINI are ideal choices for
applications requiring simple step & direction control of NEMA11, 14, 16, 17 stepper motors.
1.1 Features
Anti-Resonance for optimal torque, extra smooth motion, low motor heating and noise
Motor auto-identification and parameter auto-configuration for optimal torque from wide-range motors
Step & direction (PUL/DIR) control
Multi-Stepping for smooth motor movement
Optically isolated inputs
Input voltage 18-50VDC
16 selectable micro-step resolutions of 200-25, 600 via DIP switches
8 selectable output current settings of 0.4 – 3.2A via DIP switches
Soft-start with no “jump” when powered on
Pulse input frequency up to 1M Hz.
Automatic idle-current reduction
Protections for over-voltage and over-current
1.2 Applications
The EM532MINI stepper drive are designed to power 2 phase (1.8°) or 4-phase (0.9°) NEMA11, 14, 16, 17 hybrid
stepper motors. It can be easily adopted in many industries (CNC, medical, automation, packaging…), such as X-Y
tables, engraving machines, labeling machines, mills, plasma, laser cutters, pick and place devices, and so on. Its
excellent performance, simple design, and easy setup make it ideal for many step & direction control type applications.
2. Specifications
2.1 Electrical Specifications
Parameters
EM532MINI
Min
Typical
Max
Unit
Output Current
0.4 (0.3 RMS)
-
3.2 (2.3 RMS)
A
Supply Voltage
18
24 / 36
50
VDC
Logic signal current
7
10
16
mA
Pulse input frequency
0
-
1
MHz
MINImal pulse width
0.5
-
-
μS
MINImal direction setup
1
-
-
μS
Isolation resistance
100
MΩ

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2.2 Environment
Cooling
Natural Cooling or Forced cooling
Operating Environment
Environment
Avoid dust, oil fog and corrosive gases
Ambient Temperature
0°C －65°C (32°F - 149°F)
Humidity
40%RH－90%RH
Operating Temperature
0°C －50°C (32°F - 122°F)
Vibration
10-50Hz / 0.15mm
Storage Temperature
-20°C －65°C (-4°F - 149°F)
Weight
Approx. 90g (3.5 oz)
2.3 Mechanical Specifications
(unit: mm [1inch=25.4mm])
Figure 1: Mechanical specifications
* Side mounting recommended for better heat dissipation
2.4 Elimination of Heat
EM532MINI reliable working temperature should be < 60℃(140°F)
It is recommended to mount the drive vertically to maximize heat sink area. Use forced cooling method to cool if
necessary.

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3. Connection Pin Assignments and LED Indication
The EM532MINI has 3 terminal block connectors P1, P2 and P3, 1 DIP switch selectors S1. P1 is for control signal
and fault output connections, P2 is for power connection, P3 is for motor connection.
3.1 P1 - Control Connector and Fault Output
PIN
Details
PUL+
Pulse and Direction Connection: (1) Optically isolated, high level 4.5-5V, low voltage 0-0.5V.
(2) Maximum 1 MHz input frequency. (3) Pulse width of 0.5μs or longer. (4) DIR signal requires
advance PUL signal 1 μs at least. (5) When the control voltage is 24V, 2K resistors are required.
PUL-
DIR+
DIR-
ENA+
Enable Connection: Optional. (1) Optically isolated, differential. (2) Disable the drive by 4.5-5.0V
input connection; enable the drive by 0-0.5 VDC connection(default no connection).
(3) ENA signal requires advance DIR signal 200ms at least. (4) When the control voltage is 24V, a
2K resistor is required.
ENA-
ALM +
Fault Output Connection: Optional. (1) Maximum 24V/100mA output when over-voltage and
over-current error protections activated. (2) Sinking or sourcing. (3) The resistance between ALM+
and ALM- is low impedance as default, and will change to high when the drive goes into error
protection.
ALM-
!
Notice
Notes: (1) shield cables are required for P1; (2) don’t tie P1&P2 cables and P3 cables together.
3.2 P2 - Power Connector
Pin
Details
GND
Connect to power supply ground connection.
+VDC
18-50 VDC, power supply positive connection. Suggest 24 or 36 VDC.
!
Warning
Warning: Don’t plug/unplug P3 or P4 connector to avoid drive damage or injury while powered on.

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3.3 P3 - Motor Connector
PIN
Details
A+
Connect to motor A+ wire
A-
Connect to motor A- wire
B+
Connect to motor B+ wire
B-
Connect to motor B- wire
3.4 Indicator Light
There are two lights for EM532MINI. The GREEN one is the power indicator which will be always on generally. The
RED one is a protection indicator which will flash 1-2 times in a 3-second period, when protection enabled for a
EM532MINI. Different number of flashes indicates different protection type (read section 11 for detail).
4. Control Signal and Fault Output
4.1 Control Signal Connection
The EM532MINI can accept differential or single-ended control signals (pulse, direction, and enable) in open-collector
or PNP connection through the P1 connector (figure 2). It is recommend to add an EMI line filter between the power
supply and the drive to increase noise immunity for the drive in interference environments.
Figure 3 Connections to open-collector signals Figure 4 Connections to PNP signals
(Common-anode) (Common-cathode)
4.2 Fault output connection
When over voltage or over current protection happens, EM532MINI red status LED light will blink and the impedance
state between ALM+ and ALM- will change (from low to high or high to low depending on configuration) and can thus
be detected. Fault output connection is optional, and it can be connected either in sinking or sourcing.

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Figure 5 Fault Output Connections
5. Motor Connection
The EM532MINI can drive 2-phase and 4-pahse bipolar hybrid stepper motors with 4, 6, or 8 wires.
5.1 Connections of 4-lead Motor
The 4 lead motors are the least flexible and easy to connect. And the Speed – torque of motor depends on winding
inductance. The output current from drive that is multiply the specified phase current by 1.4 to determine the peak
output current.
Figure 6: 4-lead Motor Connections
5.2 Connections of 6-lead Motor
Like 8 lead stepping motors, 6 lead motors have two configurations available for high speed or high torque operations.
The higher speed configuration, or half coil, is described, because it uses one half of the motor’s inductor windings.
The higher torque configuration, or full coil, uses the full coil windings.
5.2.1 Half Coil Configuration
As previously stated, the half coil configuration uses 50% of the motor phase windings. This gives lower inductance,
hence, lower torque output. Like the parallel connection of 8 lead motor, the torque output will be more stable at higher
speeds. This configuration is also referred to as half chopper. In setting the drive output current multiply the specified
per phase (or unipolar) current rating by 1.4 to determine the peak output current.

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Figure 7: 6-lead motor half coil (higher speed) connections
5.2.2 Full Coil Configuration
The full coil configuration on a six lead motor should be used in applications where higher torque at lower speed is
desired. This configuration is also referred to as full copper. In full coil mode, the motors should be run at only 70% of
their rated current to prevent overheating.
Figure 8: 6-lead motor full coil (higher torque) connections
5.3 Connections of 8-lead Motor
8 lead motors offer a high degree of flexibility to the system designer in that they may be connected in series or parallel,
thus satisfying a wide range of applications.
5.3.1 Series Connection
A series motor configuration would typically be used in applications where a higher torque at lower speed is required.
Because this configuration has the most inductance, the performance will start to degrade at higher speed. In series
mode, the motors should also be run at only 70% of their rated current to prevent overheating.
Figure 9: 8-lead motor series connections
5.3.2 Parallel Connection
An 8 lead motor in a parallel configuration offers a more stable, but lower torque at lower speeds. But because of the
lower inductance, there will be higher torque at higher speeds. Multiply the phase (or unipolar) current rating by 1.96,

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or the bipolar current rating by 1.4, to determine the peak output current.
Figure 10: 8-lead motor parallel connections
6. Power Supply Selection
The EM532MINI can power medium and small size stepping motors (frame size from NEMA11 to 17) made by
Leadshine or other motor manufacturers. To get good driving performances, it is important to select supply voltage and
output current properly. Generally speaking, supply voltage determines the high speed performance of the motor, while
output current determines the output torque of the driven motor (particularly at lower speed). Higher supply voltage
will allow higher motor speed to be achieved, at the price of more noise and heating. If the motion speed requirement is
low, it’s better to use lower supply voltage to decrease noise, heating and improve reliability.
6.1 Regulated or Unregulated Power Supply
Both regulated and unregulated power supplies can be used to supply the drive. However, unregulated power supplies
are preferred due to their ability to withstand current surge and fast response for current change. If you prefer to a
regulated power supply, it is suggested to choose such a power supply specially designed for stepper/servo controls
such as Leadshine LSP series (http://www.leadshine.com/producttypes.aspx?producttype=regulated-switching). Or, in
the case when only normal switching power supplies are available, it is important to use “OVERSIZE” high current
output rating power supplies (for example, using a 4A power supply for 3A stepper motor) to avoid problems such as
current clamp. On the other hand, if unregulated supply is used, one may use a power supply of lower current rating
than that of motor (typically 50%～70% of motor current). The reason is that the drive draws current from the power
supply capacitor of the unregulated supply only during the ON duration of the PWM cycle, but not during the OFF
duration. Therefore, the average current withdrawn from power supply is considerably less than motor current. For
example, two 3A motors can be well supplied by one power supply of 4A rating.
6.2 Power Supply Sharing
Multiple EM532MINI drives can share one power supply to reduce cost, if that power supply has enough power
capacity. To avoid cross interference, connect each stepper drive directly to the shared power supply separately. To
avoid cross interference, DO NOT daisy-chain connect the power supply input pins of the Drivers. Instead connect
them to power supply separately.
6.3 Selecting Supply Voltage
The EM532MINI is designed to operate within 18-50VDC voltage input. When selecting a power supply, besides
voltage from the power supply power line voltage fluctuation and back EMF voltage generated during motor
deceleration needs also to be taken into account. Ideally it is suggested to use a power supply with the output voltage of
24VDC or 36VDC, leaving room for power line voltage fluctuation and back-EMF.

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Higher supply voltage can increase motor torque at higher speeds, thus helpful for avoiding losing steps. However,
higher voltage may cause bigger motor vibration at lower speed, and it may also cause over-voltage protection or even
drive damage. Therefore, it is suggested to choose only sufficiently high supply voltage for intended applications.
7. DIP Switch Configurations
The EM532MINI has 8-bit DIP Switch to configure output current, microstep resolution and idle current
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
7.1 Output Current Configuration (SW1-3)
The EM532MINI has 8 output current settings which can be configured through DIP switch SW1, SW2 and SW3.
For a given stepper motor, as normal setting the output current to 1.4 times of motor phase current, will make it output
larger torque, but at the same time cause more heating for both the motor and drive. Therefore, it is suggested to set a
output current (peak of sinusoidal) to no more than 1.2 times the stepper motor’s (for 4-lead motor) phase current to
prevent overheating .
Peak Current
RMS Current
SW1
SW2
SW3
0.4A
0.29A
ON
ON
ON
0.8A
0.57A
OFF
ON
ON
1.2A
0.86A
ON
OFF
ON
1.6A
1.14A
OFF
OFF
ON
2.0A
1.43A
ON
ON
OFF
2.4A
1.71A
OFF
ON
OFF
2.7A
1.93A
ON
OFF
OFF
3.2A
2.29A
OFF
OFF
OFF
7.2 Idle Current Configuration (SW4)
SW4 is used to set motor idle current percentage. At OFF position it means the standstill current is set to be 50% of the
selected output current. At ON position it means standstill current is set to be 90%.
7.3 Micro Step Configuration (SW5-8)
Each EM532MINI has 16 micro step settings which can be configured through DIP switch SW5, SW6, SW7,SW8. See
the following table for detail.
Microstep
Steps/rev.(for 1.8°motor)
SW5
SW6
SW7
SW8
1
200
ON
ON
ON
ON
2
400
OFF
ON
ON
ON
4
800
ON
OFF
ON
ON
8
1600
OFF
OFF
ON
ON
Idle Current
Output Current
Microstep

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16
3200
ON
ON
OFF
ON
32
6400
OFF
ON
OFF
ON
64
12800
ON
OFF
OFF
ON
128
25600
OFF
OFF
OFF
ON
5
1000
ON
ON
ON
OFF
10
2000
OFF
ON
ON
OFF
20
4000
ON
OFF
ON
OFF
25
5000
OFF
OFF
ON
OFF
30
6000
ON
ON
OFF
OFF
40
8000
OFF
ON
OFF
OFF
50
10000
ON
OFF
OFF
OFF
100
20000
OFF
OFF
OFF
OFF
8. Wiring Notes
In order to improve anti-interference performance of the drive, it is recommended to use twisted pair shield cable.
To prevent noise incurred in PUL/DIR signal, pulse/direction signal wires and motor wires should not be tied up
together. It is better to separate them by 10 cm at least, otherwise the disturbing signals generated by motor will
easily disturb pulse direction signals, causing motor position error, system instability and other failures.
If only one power supply serves multiple EM532MINI drives, separately connecting the drives to the power
supply is recommended instead of daisy-chaining.
It is prohibited to pull and plug connector P2 while the drive is powered ON, because there is high current flowing
through motor coils (even when motor is at standstill). Pulling or plugging connector P2 with power on will cause
extremely high back-EMF voltage surge, which may damage the drive.
9. Typical Connection
A complete stepping system should include stepping motor, stepping drive, power supply and controller (pulse
generator). A typical connection is shown as figure 11.

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Figure 11: Typical connection
10. Sequence Chart of Control Signals
In order to avoid some fault operations and deviations, PUL, DIR and ENA should abide by some rules, shown as
following diagram:
Figure 12: Sequence chart of control signals
Remark:
a) t1: ENA must be ahead of DIR by 200ms at least. Usually, ENA+ and ENA- are NC (not connected). See
“Connector P1 Configurations” for more information.
b) t2: DIR must be ahead of PUL effective edge by 1s to ensure correct direction;
c) t3: Pulse width not less than 0.5s;
d) t4: Low level width not less than 0.5s.

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11. Protection Functions
To improve reliability, the drive incorporates some built-in protections features.
Priority
Time(s) of
Blink
Sequence wave of red LED
Description
1st
Always on
The drive was short-circuited or burned out.
1st
1
Over-current protection activated when peak
current exceeds the limit.
2nd
2
Over-voltage protection activated when drive
working voltage is greater than 52VDC
When above protections are active, the motor shaft will be free or the red LED blinks. Reset the drive by repowering it
to make it function properly after removing above problems.

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12. Troubleshooting
In the event that your drive doesn’t operate properly, the first step is to identify whether the problem is electrical or
mechanical in nature. The next step is to isolate the system component that is causing the problem. As part of this
process you may have to disconnect the individual components that make up your system and verify that they operate
independently. It is important to document each step in the troubleshooting process. You may need this documentation
to refer back to at a later date, and these details will greatly assist our Technical Support staff in deterMINIng the
problem should you need assistance.
Many of the problems that affect motion control systems can be traced to electrical noise, controller software errors, or
mistake in wiring.
Problem Symptoms and Possible Causes
Trouble
Solution Measures
Motor is not rotating
No power, to start power supply
Pulse/revolution setting is wrong
DIP switch current setting is wrong
Fault condition exists or the drive is disabled
Motor rotates in the wrong
direction
Motor phases may be connected in reverse
Maybe the pulse mode is CW&CCW, or the control signal is 24V without
connected 2K resistor.
Red light blinking
Red light blinks 1 time or always on, try not to connect the motor and restart the
power supply
Red light blinks 2 times, check the power voltage and restart the power supply
Erratic motor motion
Current setting is too small, losing steps
Wrong motor connection or has broken circuit in motor coil.
The current of the control signals is not in the range of 7-15mA
Control signals don’t meet the requirements of chapter 10 , check the waveform
of the control signals
Motor stalls or loss steps
Output current of the drive is too small or motor torque is not enough
Acceleration is set too high
Power supply voltage too low
Modify the activated edge value in the ProTuner or the control signal is interfered
with.
Excessive motor and drive
heating
Inadequate heat sinking / cooling
Automatic current reduction function not being utilized
Reduce output current

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13. Warranty
Twelve Month Warranty
Leadshine Technology Co., Ltd. warrants its products against defects in materials and workmanship for a period of 12
months from shipment out of factory. During the warranty period, Leadshine will either, at its option, repair or replace
products which proved to be defective.
Exclusions
The above warranty does not extend to any product damaged by reasons of improper or inadequate handlings by
customer, improper or inadequate customer wirings, unauthorized modification or misuse, or operation beyond the
electrical specifications of the product and/or operation beyond environmental specifications for the product.
Obtaining Warranty Service
To obtain warranty service, please contact your seller to obtain a returned material authorization number (RMA) before
returning product for service.
Shipping Failed Products
If your product fail during the warranty period, please contact your seller for how and where to ship the failed product
for warranty or repair services first, you can also e-mail customer service at [email protected] to obtain a returned material
authorization number (RMA) before returning product for service. Please include a written description of the problem along with contact
name and address.
14. Contact Us
China Headquarter
Address: 15-20/F, Block B, Nanshan I Valley, No.3185, Shahe West Road, Nanshan District, Shenzhen, Guangdong,
518055, China
Web: http://www.leadshine.com
Sales Hot Line:
Tel: [phone] (for All)
86-755-2641-7674 (for Asia, Australia, Africa areas)
86-755-2640-9254 (for Europe, America areas)
Fax: [phone]
Email: [e-mail].
Technical Support:
Tel: [phone] and 86-755-2647-1129
Fax: [phone]
Email: [e-mail].
Leadshine U.S.A
Address: 26050 Towne Centre Dr. Foothill Ranch, CA 926 USA
Tel: [phone]
Fax: [phone]

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Web: http://www.leadshineusa.com
Email: [e-mail] and [e-mail].