BL-240M（low-noise）

(5.6A,20-70V,128 subdivision)

Micro Step Driver Datasheet

Version 1.0
All Rights Reserved
【 Please read this manual carefully before using it 】

常 州 宝 来 电 器 有 限 公 司 CHANGZHOU BAOLAI ELECTRIC APPLIANCE CO.,LTD.

地址：江苏省常州市戚墅堰经济开发区 ADD: Qishuyan Economic Develop Zone,

东方东路 167 号 Changzhou, Jiangsu, China

电话：0086-519-88372126 13961133560 Tel: 0086-519-88372126 13961133560

传真：0086-519-88372780 Fax: 0086-519-88372780

主页：http://www.baolai-cn.com http://www.baolai-cn.com

邮件: info@baolai-cn.com E-mail: info@baolai-cn.com

baolai@vip.sina.com baolai@vip.sina.com

邮编：213025 联系人：秦祖兴 PC：213025 Contact: Zuxin Qin

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 BL-240M Micro Step Drive Actuator InstructionVersion1.0 BL-240M Micro Step Drive Actuator InstructionVersion1.0
Chapter One Introduction........................................................................................................2
1.1 Outline.......................................................................................................................... 2 BL-240M Stepper Motor Driver
1.2 Feature.......................................................................................................................... 2
1.3 Useage.......................................................................................................................... 3
Chapter Two Electrical, mechanical and environmental specification................................... 3 Chapter One Introduction
2.1 Electrical.......................................................................................................................3
1.1 Outline
2.2 Environment and parameters........................................................................................3
BL-240M is a high performance price ratio subdivision driver successfully developed by
2.3 Mechanical installation diagram.................................................................................. 3
our company. Especially suitable for large volume and low cost usage ,the driver also has
2.4 Heat dissipation method............................................................................................... 4
many advantages. As a result of the three-state control technology, this type of driver are
Chapter Three Interface and wiring introduction.................................................................... 4
significantly improved at noise and fever than the majority of low cost drivers in the market.
3.1 P1 weak electric signal interface description............................................................... 4
This driver has as many as fifteen kinds of subdivision options with binary and five hex. In
3.2 P2 heavy current interface discription..........................................................................4
order to compatible with some PLC, this driver provides a backup function of the double
3.3 Input interface description............................................................................................4
pulse. Users only need to change the jumper in the driver, you can let the driver to accept CW
3.4 Control signal timing diagram......................................................................................5
positive pulse and reverse pulse CCW. The eight bit dial switch group (SW1-SW8), which
3.5 Internal jumper Description......................................................................................... 5
can be used to set the dynamic current (eight bit three file), static current (SW4) and the
3.6 Wiring Requirements....................................................................................................5
subdivision of the selection (SW5-SW8). When SW4 stop,you can choose the flow or half
Chapter Four Current,subdivision and dial switch settings.....................................................6
flow, such as the choice of half flow, the pulse stop about 0.4 seconds after the motor current
4.1 The current settings...................................................................................................... 6
will be reduced to set the value of 60%, the calorific value will be reduced to half the total
4.2 Subdivision settings......................................................................................................6
flow of the following (I2R). Compared with MA335B, the drive voltage and current range is
4.3 Single and double pulse selection................................................................................ 6
expanded, the heat and noise of the motor is improved obviously, and the high speed
Chapter Five Power supply selection...................................................................................... 7
performance is improved, and the size of the actuator is reduced. So it’s highly competitive
Chapter Six Matching motor................................................................................................... 7
and attractive.compared to most of the small and medium drive on the market.
6.1 Matching motor selection.............................................................................................7
6.2 Motor wiring................................................................................................................ 7 1.2 Feature
6.3 The selection of the output voltage and output current .............................................. 8 a. National patent technology
Chapter Seven Typical wiring case......................................................................................... 8 b. Optical isolated differential signal input, the pulse response frequency is the highest up to
Chapter Eight Protection function...........................................................................................9 400KHz.
Chapter Nine Common problem............................................................................................. 9 c. Cheap price and high torque
Chapter Ten Product warranty terms.......................................................................................9 d. Supply voltage can reach 70VDC, the maximum output current can reach 5.6A (the
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average value is 4.0A).
2.2 Environment and parameters
e. Subdivision accuracy of 4, 6, 8,16,32,64,128,5,10, 20, 25, 40, 50,100,125 times
subdivision options
f. Three-state current control technology of motor produce low fever Type of cooling Natural cooling or forced air cooling

g. The little size (118 x 75.5 x 33mm) Place Avoid dust, oil mist and corrosive gas

h. Current setting is convenient, eight optional files; when the motor is at rest, the current Temperature 0℃-50℃

automatically halved Max operating

70℃
i. Can drive 4, 6, 8 line two-phase or four-phase stepper motor Environment temperature
j. It has over voltage, short circuit protection function Humidity 40-90%RH9（No condensation and water）
k. Selectable pulse rising edge or falling edge triggered Vibration 5.9m/s2 Max
l. Pulse direction is CW or CCW Save temperature -20℃-125℃
Weight 280g
1.3 Usage

This type of driver is suitable for all kinds of small and medium automation equipment
2.3 Mechanical installation diagram
and apparatus.Such as engraving machine, marking machine, cutting machine, laser
Phototypesetting, plotter, CNC machine tools, handling device and so on. Efect is particularly Unit：mm
good In low cost, low noise and high speed equipment.

Chapter Two Electrical, mechanical and environmental specification BL-240M

2.1 Electrical

Instruction BL-240M
Min Typical Max Unit
Output current 0.54 - 5.6（average 4） A
Input power supply 20 60 70 VDC
Logic input current 7 10 16 mA
1 Mechanical installation diagram
Step pulse frequency 0 - 300 KHz
(Recommended by the driver installed in the side, better heat dissipation!)
Insulation resistance 500 MΩ
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2.4 Heat dissipation method 3.2 P2 heavy current interface discription

a. The reliable operating temperature of the actuator is usually within 60℃, and the Name Function
operating temperature of the motor is within 80℃. GND DC power supply grounded
b. Choose to use automatic half flow system (that is, the motor stop automatically when the DC power supply positive, + 20V - + 70V between any value can be, but it is
+V
current 60% reduction), to reduce the motor and the drive of fever. recommended around + 60VDC
c. Please install the drive by the side mounted vertically, in order to make the effective heat A A phase. A-, A+ can be replaced, then change the direction of a motor running
dissipation area of the heat sink is the largest and form strong air convection. If necessary,you B B phase. B-, B+ can be replaced, then change the direction of a motor running
can install a fan near the driver in machine,forced cooling, to ensure that drivers in reliable
3.3 Input interface description
working temperature range.
BL-240M drive using differential interface circuit that suitable for differential signal.
Single-ended used common cathode and common anode interfaces, high-speed optical
Chapter Three Interface and wiring introduction
coupler built-in , long drive allowed，signal of open collector and PNP output circuit. In the
3.1 P1 weak electric signal interface description harsh environment applications, we recommend using long drive circuit because of its

Name Function anti-interference ability. Now open collector and PNP output as an example, the interface

PUL+ Pulse control signal：pulse rising edgeis effective；PUL- high voltage is circuit diagram is as follows: 集电极开路（共阳极）
（+5V） 4-5V,the low voltage is 0-0.5V. In order to responsethe pulse signal
PUL- reliably,pulse width can be set greater than 1 μs .When the working voltage is 驱动器
VCC PUL+ 270欧
（PUL） +12V or +30V ,we need a series resistance.
↑
↑
脉冲信号 R PUL-
Drectional signal：High / low level signal, corresponding to the positive and
DIR+ 270欧
DIR+ negative motor. The signal should be established prior to the pulse signal at 控
↑
制
↑
方向信号 R DIR-
（+5V） least 5 μs,in order to guarantee motor commutate reliability.The initial
器 ENA+ 270欧
running direction of motor depends on the wring.Swap any two wries which ↑
DIR- 使能信号 R ENA-
↑

belongs to three-phase winding U, V, W can change the initial direction of the

（DIR）
motor running，DIR-high voltage is 4-5V and the low is 0-0.5V.
ENA+ VCC值为5V时，R短接；
Enable signal：this input signal is used to enable or disable. High level enable, VCC值为12V时，R为1K，大于1/8W电阻；
（+5V） VCC值为24V时，R为2K，大于1/8W电阻；
low level can not work. The general situation can not be connected, so that it R必须接在控 制器信号端。
ENA-
can be enableed automatically. 2 Input interface circuit of open collector（common anode）
（ENA）

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PNP输 出 （ 共 阴 极 ）
Under normal circumstances, proposed ENA+ and ENA- be left vacant.

VCC
B: DIR at least PUL in advance of the falling edge of 5us to determine its status of high or
驱动器
脉冲信号
脉冲信号 R PUL+ 270欧 low.
控 ↑

制 VCC
PUL-
↑
C: Pulse width of at least not less than 1us.
器 方向信号
方向信号 R DIR+ 270欧 D: Low-level width of not less than 1us.
↑
↑
DIR-
VCC
使能信号
3.5 Internal jumper Description
使能信号 R ENA+ 270欧

a: Select the effective pulse edge

↑
↑
ENA-

GND b: By setting a jumper row J1 inside the driver , determined BL-240M is receiving rising
edge or falling edge ,as shown below, factory setting is rising edge.
VCC值 为 5V时 ， R短 接 ；
VCC值 为 12V时 ， R为 1K， 大 于 1/8W电 阻 ； c: Choose single-pulse and double-pulse mode
VCC值 为 24V时 ， R为 2K， 大 于 1/8W电 阻 ；
R必 须 接 在 控 制 器 信 号 端 。 d: Inside the drive has a jumper row J3 dedicated to set the pulse control mode, single pulse

3 Input interface circuit of PNP output（common cathode）

and double pulse mode is set as follows, factory setting is one-pulse mode.
J1 J1 J3 J3

3.4 Control signal timing diagram

In order to avoid malfunctions and deviations, PUL, DIR and ENA should meet certain J1开路： J1短路： J3开路： J3短路：
上升沿有效 下降沿有效 单脉冲模式 双脉冲模式
requirements, as follows:

＞5μs 高电平高于3.5V
3.6 Wiring Requirements
PUL
↑

↑ a. In order to prevent the driver from interference, we recommend the use of shielded twisted
↑ ↑
低电平低于0.5V pair cableand and connect the shield to the ground; the same machine can only be allowed at

＞5μs ↑ 高电平高于3.5V the same point, if it is not a real grounding line, may interfere with serious, the shielding
DIR
↑
layer is not connected at this time.
↑
低电平低于0.5V
↑
b. Pulse direction signal line and the motor line does not allow side by side together,
＞5μs
preferably separated by at least 10cm or more, otherwise the motor noise easily disturb pulse
ENA direction signals cause the motor positioning allowed, system instability and other failures.

4 timing diagram c. If one power supply for more than one drive, connected in parallel with the power

Note： supply ,it is not allowed that supply taken at the first one and then another chain connection.

A: ENA（enable signal）should be established prior to DIR at least 5 μs, ensure that to be high. d. Prohibit electric plug drives strong electrical P2 terminals, when the motor is stopped still
live large current flows through the coil, plug P2 terminal will lead to huge moment induced
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electromotive force will burn drive. dynamic current is the same. In general use SW4 should be set to off, so that the motor and
e. Prohibited the lead after the first Makassar then access terminals, or may be due to the drive heating reduction, increased reliability. About 0.2 seconds after the pulse train stops, the
contact resistance increases, overheating and damage to the terminal. current is automatically reduced to 60% of the setting value, and the calorific value is
reduced to 36% (proportional to the square of the heat and current).

Chapter Four Current,subdivision and dial switch settings 4.2 Subdivision settings
The BL-240M driver uses eight bit dial switches to set the subdivision accuracy, the Subdivision accuracy is set by SW5-SW8 four dial switches.
dynamic current and the half flow/ total flow. Details are as follows： Subdivision step/r（1.8°） SW5 SW6 SW7 SW8
动态电流 细分精度
2 400 off on on on
SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 4 800 on off on on
半 流 /全 流
8 1600 off off on on
4.1 The current settings 16 3200 on on off on
32 6400 off on off on
The SW1-SW3 three bit dial switch is used to set the current (dynamic current) of the
64 12800 on off off on
motor running, while the SW4 dial switch is used to set the quiescent current (quiescent
current). 128 25600 off off off on

A. Work (dynamic) current set, with a total of three dial switch can be set to eight current 5 1000 on on on off

levels, see table below. 10 2000 off on on off

MAX（A） AVERAGE（A） SW1 SW2 SW3 20 4000 on off on off

1.4 0.99 off off off 25 5000 off off on off

2.1 1.41 on off off 40 8000 on on off off

2.7 1.91 off on off 50 10000 off on off off

3.2 2.26 on on off 100 20000 on off off off

3.8 2.69 off off on 125 25000 off off off off

4.3 3.04 on off on

4.9 3.46 off on on 4.3 Single and double pulse selection

5.6 3.96 on on on In general, the factory is set to a single pulse mode (i.e., pulse plus direction) if you need to
double pulse function to tell us in advance in order to special treatment.
B. Stop (static) current setting, quiescent current can be set by SW4, off is set quiescent
current (actually 60%)to half of the Dynamic current, on represents the static current and

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Chapter Five Power supply selection 6.1 Matching motor selection

Power supply voltage between DC20V - 70V can work normally ，BL-240M driver is A. Determine the load torque, the transmission ratio operating speed range
best to use the non regulated DC power supply, also can use the "transformer buck + bridge T=C［(J×a1×η)/i2+I/2μ×M×D+J1 ×a2］
rectifier + capacitor filter" way, capacitor desirable 6800uf or 10000uf. However, the J: Moment of inertia of the load a1: The maximum angular acceleration of load
maximum value of the rectified voltage ripple does not exceed 70V. Recommended to use + a2; Drive wheel or screw angular acceleration
30V-60V DC power supply to avoid power fluctuations over the drive voltage range. If you M: Weight of load C: A safety coefficient ,1.2 1.4 recommended
use regulated switching power supply, should pay attention to the power supply output μ: The coefficient of friction η: Transmission efficiency D: Screw and wheel diameter
current range must be greater than the motor current. J1: Moment of inertia of rotating wheel or screw rod i: Rotation ratio
Note ： B. What factors can determine the motor output torque?
A. The power supply wiring do not reverse the positive and negative. For a given step motor and the connection method, the output torque has the following
B. It is better to use non regulated power supply. characteristics：
C. When using non regulated power supply,the supply current output capacity should be a. The greater the motor working current, the greater the output torque, but the more motor
greater than current drive to 60%. copper loss (P=I2R), the more motor heat deflection;
D. When using regulated power supply, the output current of the power supply should be b. The higher the driver supply voltage, the higher the speed of the motor;
greater than or equal to the operating current of the drive. c. By stepping motor torque-speed characteristic in the figure followed shows that high
E. In order to reduce the cost, the two or three drivers can share a power supply, but should speed is smaller than in the low speed torque.
ensure that the power is large enough.
T(N.m) T(N.m)

Chapter Six Matching motor

BL-240M can be used to drive 4,6,8 line of two-phase and four phase hybrid step motor, I-ΔI
I+ΔI
U-ΔU
U+ΔU
I U
step angle for 1.8 and 0.9 degrees can be applied. The choice of motor is mainly determined
0 V(r/m) 0 V(r/m)

by the motor's torque and the rated current. The torque is mainly determined by the size of
5 torque-speed characteristic
the motor, a large motor has a high torque. The current size is mainly concerned with the
6.2 Motor wiring
inductance, small motor inductance good high-speed performance, but the current is large.
For line 6, 8 stepper motor, the different connection leads to a significant difference on the
Please contact the Burroughs Corporation sales (0519-88372126 or
effect, as described below:
E-MAIL:info@baolai-cn.com) to consult the specific method of motor selection!

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P2 P2 P2
to or less than the motor rated current value;
A+ A+ A+

A- A- A- b. Six wire motor in high torque mode: output current motor rated current of 70%;
B+ B+ B+

B- B- B-
c. Eight wire motor series connection method: because the series resistance increases, the
4线电机 8线电机并行接法 8线电机串行接法
高速性能好 低速力矩大 output current should be set to 70% of the rated current of the motor;
P2 P2

A+ A+
d. Eight wire parallel connection method: the output current can be set to 1.4 times the rated
NC
A- A-
NC
current of the motor.
B+ B+

B-
NC
B-
NC
Note: Please operate motor 30 to 60 minutes after current setting, such as the motor
6线电机 6线电机
高力矩模式 高速模式 temperature rise is too high (> 70 ℃), you should reduce the current settings. Therefore, the
6 motor wiring general situation is set to the current value of the motor warm but not too hot when long-term
6.3 The selection of the output voltage and output current work.
BL-240M driver can drive two phase and four phase hybrid stepping motor, in order to
achieve the most satisfactory driving effect, it is necessary to select a reasonable power
Chapter Seven Typical wiring case
supply voltage and current. The power supply voltage determines the high speed performance
BL-240M with 86BYGH250A series and parallel connection method (if the motor don’t
of the motor, and the current setting value determines the torque of the motor.
turns to the desired direction, only the exchange of A+, A- position will be OK). BL-240M
A. The power supply voltage settings
driver can drive two phase and four phase stepping motor with four -line, six-line and
Generally speaking, the higher the power supply voltage, the higher the torque of the
eight-line. The detailes of wiring are as followed:
motor is, the more it can avoid the losing step in a high speed. But on the other hand, the
voltage is too high to cause over-voltage protection, motor heating is more, even can damage +5V PUL+ 270欧
↑
+5V PUL+ 270欧
↑
↑ ↑
PUL- PUL-

the driver. When working under high voltage, the vibration of the motor at low speed will be DIR+ 270欧 DIR+ 270欧
控 控
larger.
↑ ↑
制 制
↑ ↑
DIR- DIR-

器 ENA+
器 ENA+
B.Current settings 270欧
↑
↑
270欧
↑
↑
ENA- ENA-

For the same motor, the greater the current setting value, the greater the output torque is,
BL-250M BL-250M
but the fever of the motor and driver is more serious. The size of the specific heat is not
驱 驱
only related to the setting value, but also related to the movement type and residence time. 动 动
直流电源 GND 直流电源 GND
The following setting method is used as a reference for the rated current of the motor, but the 30V-60VDC
+V 器 30V-60VDC
+V 器
optimal value of the actual application should be adjusted on the basis of this method. In 86BYGH250A
A+(蓝黄）
A-(红绿） 86BYGH250A
A+(蓝）
A-(绿）
B+(棕橙） B+(棕）
步进电机 步进电机
principle, such as low temperature (less than 40), can be considered to increase the current B-(黑白） B-(白）

setting value to increase the motor output power (torque and high-speed response).
a. Four wire motor and six wire motor in high speed mode: output current is set to be equal
7 parallel connection 8 series connection
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No response to a control signal No-power
Chapter Eight Protection function Motor lines are wrong Exchange of two-phase motor of
A. Over voltage protection Motor steering the same line(E.g., A +, A- wiring
When the DC power supply voltage +V exceeds 80VDC, the protection circuit moves, the error exchange position)
power indicator light turn to red and the protection function is started. Motor lines are open circuit Check and correct
B. Motor coil turn to turn short circuit protection Motor lines are wrong Check the wiring
Electrical wiring coil windings shorted or the motor itself is damaged,the protection circuit Alarm indicator Voltage is too high or too low Check the power
moves, the power indicator light turn to red and the protection function is started. light Drive or motor burned Replace the motor or drive
C. Motor fault phase protection Signal interference Eliminate interference
Protection function is activated when the motor winding two-phase sequence is wrong. The shield is not connected Grounded reliablity
When the protection function is started, the motor shaft is losing the self lock force, and the
Motor lines are open circuit Check and correct
power indicator light is red. To resume normal work, we need to confirm the fault elimination, Location not Wrong subdivision Set the subdivision
and then power on the power, the power indicator lights become green, the motor shaft is allowed Current is small Increase the current
locked, the driver returned to normal.
Acceleration time is too short Acceleration time extended
Note: Because the drive does not have the function of reverse polarity protection, so please
Motor stall Motor torque is too small Choose high-torque motors
confirm again before the power supply that the positive and negative wiring is correct.
during Low voltage or current is too
Positive and negative reversed will cause the drive to the fuse burned out! Increase the voltage or current
acceleration small

Chapter Nine Common problem In case of other questions, please contact our Application Engineer：
The following are some of the common problems and Solutions： TEL：0519-88372126 FAX：0519-88372780
phenomenon possible causes solution
Power light does not shine Check the power supply circuit Chapter Ten Product warranty terms
Powerful motor shaft Pulse signal is weak, the signal A. The company provides one year starting from the date of shipment of raw materials and
current increase to 7-16mA workmanship warranty on its products. Burroughs during the warranty period for the
Motor does not
Segments too small Choose the right subdivision defective product to provide free maintenance service.
turn
Current setting is too small Choose the right current B. Column does not belong to warranty

Drive is protected Re-power ●Improper wiring, such as positive and negative reversed power and electric plug

Enable signal is low Make signal high or not connected ●Without permission to change the internal device
●Beyond the use of electrical and environmental requirements
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●Environmental cooling bad
C. Maintenance procedures
As required maintenance products, will deal with the following scheme：
a. Call customer pre-delivery service required to obtain the return authorization number;
b. With goods enclose written explanation that repair drive failures, failure occurs when the
voltage, current, and the use of the environment and situation; contact name, telephone
number and mailing address information;
c. Prepaid sent to Qishuyan Economic Develop Zone, Changzhou,Jiangsu,China (213025 )
Changzhou Baolai Electric Appliance Co., Ltd.. (return postage paid by the Baolai Electric
Appliance Co., Ltd. )
D.Warranty restrictions
a. Warranty scope is limited to the device and process of the product (i.e., the agreement)
b. Do not guarantee that its products can be suitable for the specific purpose of the customer,
because whether it is suitable for the purpose of the technical indicators and the use of
conditions and environment.
c. Do not recommend the use of this product for clinical medical use
E. Maintenance requirements
Please fill out "Maintenance Report" (This form can be downloaded on www.baolai-cn.com
or E-mail to info@baolai-cn.com) to facilitate the maintenance analysis.

ADD: Qishuyan Economic Develop Zone, Changzhou,Jiangsu,China Changzhou Baolai

Electric Appliance Co., Ltd..
Zip code：213025