SMC Networks LECSB2-T Series User manual

PRODUCT NAME
AC Servo Motor Driver
(Pulse input type/Positioning type）
MODEL/ Series
LECSB2-T□Series
Doc no. JXC※-OMW0024

A -1
LECSB2-T□Series / Driver
1. Safety Instructions
These safety instructions are intended to prevent hazardous situations and/or equipment damage.
These instructions indicate the level of potential hazard with the labels of “Caution,” “Warning” or “Danger.”
They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC),
*1) and other safety regulations.
*1) ISO 4414: Pneumatic fluid power -- General rules relating to systems
ISO 4413: Hydraulic fluid power -- General rules relating to systems
IEC 60204-1: Safety of machinery -- Electrical equipment of machines (Part 1: General requirements)
ISO 10218: Manipulating industrial robots -- Safety
.
Caution
Caution indicates a hazard with a low level of risk which, if not avoided, could result in minor or
moderate injury.
Warning
Warning indicates a hazard with a medium level of risk which, if not avoided, could result in
death or serious injury.
Danger
Danger indicates a hazard with a high level of risk which, if not avoided, will result in death or
serious injury.
Warning
1. The compatibility of the product is the responsibility of the person who designs the equipment or
decides its specifications.
Since the product specified here is used under various operating conditions, its compatibility with specific
equipment must be decided by the person who designs the equipment or decides its specifications based on
necessary analysis and test results.
The expected performance and safety assurance of the equipment will be the responsibility of the person who
has determined its compatibility with the product.
This person should also continuously review all specifications of the product referring to its latest catalog
information, with a view to giving due consideration to any possibility of equipment failure when configuring
the equipment.
2. Only personnel with appropriate training should operate machinery and equipment.
The product specified here may become unsafe if handled incorrectly.
The assembly, operation and maintenance of machines or equipment including our products must be
performed by an operator who is appropriately trained and experienced.
3. Do not service or attempt to remove product and machinery/equipment until safety is confirmed.
The inspection and maintenance of machinery/equipment should only be performed after measures to
prevent falling or runaway of the driven objects have been confirmed.
When the product is to be removed, confirm that the safety measures as mentioned above are implemented
and the power from any appropriate source is cut, and read and understand the specific product precautions
of all relevant products carefully.
Before machinery/equipment is restarted, take measures to prevent unexpected operation and malfunction.
4. Contact SMC beforehand and take special consideration of safety measures if the product is to be
used in any of the following conditions.
1) Conditions and environments outside of the given specifications, or use outdoors or in a place exposed to
direct sunlight.
2) Installation on equipment in conjunction with atomic energy, railways, air navigation, space, shipping,
vehicles, military, medical treatment, combustion and recreation, or equipment in contact with food and
beverages, emergency stop circuits, clutch and brake circuits in press applications, safety equipment or
other applications unsuitable for the standard specifications described in the product catalog.
3) An application which could have negative effects on people, property, or animals requiring special safety
analysis.
4) Use in an interlock circuit, which requires the provision of double interlock for possible failure by using a
mechanical protective function, and periodical checks to confirm proper operation.

A -2
Note that the CAUTION level may lead to a serious consequence according to conditions. Please follow the
instructions of both levels because they are important to personnel safety.
What must not be done and what must be done are indicated by the following diagrammatic symbols.
Prohibition
Indicates what must not be done. For example, "No Fire" is indicated by
Compulsion
Indicates what must be done. For example, grounding is indicated by
In this Instruction Manual, instructions at a lower level than the above, instructions for other functions, and so
on are classified into "POINT".
After reading this installation guide, always keep it accessible to the operator.

A -3
LECSB2-T□Series/Driver
1. Safety Instructions
Caution
The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and exchange specifications or a
contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer” and “Compliance
Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
The warranty period of the product is 1 year in service or 1.5 years after the product is delivered,
whichever is first.*3)
Also, the product may have specified durability, running distance or replacement parts. Please consult
your nearest sales branch.
For any failure or damage reported within the warranty period which is clearly our responsibility, a
replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any other damage incurred
due to the failure of the product.
Prior to using SMC products, please read and understand the warranty terms and disclaimers noted in
the specified catalog for the particular products.
*3) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum pad
or failure due to the deterioration of rubber material are not covered by the limited warranty.
Compliance Requirements
When the product is exported, strictly follow the laws required by the Ministry of Economy, Trade and Industry
(Foreign Exchange and Foreign Trade Control Law).

A -4
1. To prevent electric shock, note the following
WARNING
Before wiring and inspections, turn off the power and wait for 15 minutes or more until the charge lamp
turns off. Then, confirm that the voltage between P+ and N- is safe with a voltage tester and others.
Otherwise, an electric shock may occur. In addition, when confirming whether the charge lamp is off or
not, always confirm it from the front of the driver.
Ground the driver and servo motor securely.
Any person who is involved in wiring and inspection should be fully competent to do the work.
Do not attempt to wire the driver and servo motor until they have been installed. Otherwise, it may cause
an electric shock.
Do not operate switches with wet hands. Otherwise, it may cause an electric shock.
The cables should not be damaged, stressed, loaded, or pinched. Otherwise, it may cause an electric
shock.
During power-on or operation, do not open the front cover of the s driver. Otherwise, it may cause an
electric shock.
Do not operate the driver with the front cover removed. High-voltage terminals and charging area are
exposed and you may get an electric shock.
Except for wiring and periodic inspection, do not remove the front cover of the driver even if the power is
off. The driver is charged and you may get an electric shock.
To prevent an electric shock, always connect the protective earth (PE) terminal (marked ) of the driver
to the protective earth (PE) of the cabinet.
When using a residual current device (RCD), select the type B.
To avoid an electric shock, insulate the connections of the power supply terminals.
2. To prevent fire, note the following
CAUTION
Install the driver, servo motor, and regenerative resistor on incombustible material. Installing it directly or
close to combustibles will lead to a fire.
Always connect a magnetic contactor between the power supply and the main circuit power supply (L1,
L2, and L3) of the driver, in order to configure a circuit that shuts down the power supply on the side of
the driver’s power supply. If a magnetic contactor is not connected, continuous flow of a large current
may cause a fire when the driver malfunctions.
When using the regenerative resistor, switch power off with the alarm signal. Not doing so may cause a
fire when a regenerative transistor malfunctions or the like may overheat the regenerative resistor.
Provide adequate protection to prevent screws and other conductive matter, oil and other combustible
matter from entering the driver and servo motor.
Always connect a molded-case circuit breaker to the power supply of the driver.
3. To prevent injury, note the following
CAUTION
Only the voltage specified in the Instruction Manual should be applied to each terminal. Otherwise, a
burst, damage, etc. may occur.
Connect cables to the correct terminals. Otherwise, a burst, damage, etc. may occur.
Ensure that polarity (+/-) is correct. Otherwise, a burst, damage, etc. may occur.
The driver heat sink, regenerative resistor, servo motor, etc. may be hot while power is on or for some
time after power-off. Take safety measures, e.g. provide covers, to prevent accidental contact of hands
and parts (cables, etc.) with them.

A -5
4. Additional instructions
The following instructions should also be fully noted. Incorrect handling may cause a fault, injury, electric
shock, etc.
(1) Transportation and installation
CAUTION
Transport the products correctly according to their mass.
Stacking in excess of the specified number of product packages is not allowed.
Do not hold the front cover when transporting the driver. Otherwise, it may drop.
Install the driver and the servo motor in a load-bearing place in accordance with the Instruction Manual.
Do not get on or put heavy load on the equipment.
The equipment must be installed in the specified direction.
Leave specified clearances between the driver and the cabinet walls or other equipment.
Do not install or operate the driver and servo motor which have been damaged or have any parts missing.
Do not block the intake and exhaust areas of the driver. Otherwise, it may cause a malfunction.
Do not drop or strike the driver and servo motor. Isolate them from all impact loads.
When you keep or use the equipment, please fulfill the following environment.
Environment
Conditions
Driver
Servo motor
Ambient
temperature
In operation
[ ]
0 to 55 (non-freezing)
0 to 40 (non-freezing)
[ ]
32 to 131 (non-freezing)
32 to 104 (non-freezing)
In storage
[ ]
20 to 65 (non-freezing)
15 to 70 (non-freezing)
[ ]
4 to 149 (non-freezing)
5 to 158 (non-freezing)
Ambient
humidity
In operation
90%RH or less (non-condensing)
80%RH or less (non-condensing)
In storage
90%RH or less (non-condensing)
Ambience
Indoors (no direct sunlight) Free from corrosive gas, flammable gas, oil mist, dust and dirt
Altitude
Max. 2000m (6560 ft) above sea level
(Note)
Vibration
[m/s2]
5.9 or less
at 10 Hz to 55 Hz
(directions of X, Y
and Z axes)
LECSB2-T5
LECSB2-T7
LECSB2-T8
LECSB2-T9
series
X Y: 49
When handling the driver, be careful about the edged parts such as corners of the driver.
The driver must be installed in the metal cabinet.

A -6
(2) Wiring
CAUTION
Perform wiring correctly and securely. It may cause unexpected movement of the servo motor.
Do not attach a phase-advancing capacitor, surge killer, or radio noise filter (FR-BIF manufactured by
Mitsubishi Electric Corporation) to the output side of the driver.
Connect the driver and servo motor power phases (U, V, W) correctly, as this may cause the servo motor
to malfunction.
Connect the driver power output (U, V, and W) to the servo motor power input (U, V, and W) directly. Do
not let a magnetic contactor, etc. intervene. Otherwise, it may cause a malfunction.
UServomotor
M
V
W
U
V
W
U
M
V
W
U
V
W
Servoamplifier ServomotorServoamplifier
The surge absorbing diode installed to the DC relay for control output should be fitted in the specified
direction. Otherwise, the emergency stop and other protective circuits may not operate.
DOCOM 24 V DC
Servo amplifier
RA
For sink output interface
Control output
signal
DOCOM
Control output
signal
24 V DC
Servo amplifier
RA
For source output interface
When the cable is not tightened enough to the terminal block, the cable or terminal block may generate
heat because of the poor contact. Be sure to tighten the cable with specified torque.
Connecting a servo motor for different axis to the U, V, W, or CN2 may cause a malfunction.
Configure a circuit turn off EM2 or EM1 whenthe main circuitpower supply is turned off to prevernt an
unexpected restart of the driver
To prevent malfunction, avoid bundling power lines (input/output) and signal cables together or running
them in parallel to each other. Separate the power lines from the signal cables.
(3) Test run and adjustment
CAUTION
Before operation, check the parameter settings. Improper settings may cause some machines to perform
unexpected operation.
Never adjust or change the parameter values extremely as it will make operation unstable.
Do not close to moving parts at servo-on status.
(4) Usage
CAUTION
Provide an external emergency stop circuit to ensure that operation can be stopped and power switched
off immediately.
Do not disassemble, repair, or modify the equipment.
Before resetting an alarm, make sure that the run signal of the driver is off in order to prevent a sudden
restart. Otherwise, it may cause an accident.
Driver
Driver
Driver
Driver

A -7
Use a noise filter to reduce the effects of electromagnetic interference. Electromagnetic interference may
occur on electronic devices used near the driver.
Do not burn or disassemble the driver, as toxic gas may be generated.
CAUTION
Use a noise filter, etc. to minimize the influence of electromagnetic interference. Electromagnetic
interference may be given to the electronic equipment used near the driver.
Burning or breaking a driver may cause a toxic gas. Do not burn or break it.
Use the driver with the specified servo motor.
The lock on the servo motor is designed to hold the motor shaft and should not be used for ordinary
braking.
For such reasons as service life and mechanical structure (e.g. where a ball screw and the servo motor
are coupled via a timing belt), the lock may not hold the motor shaft. To ensure safety, install a stopper
on the machine side.
(5) Corrective actions
CAUTION
When it is assumed that a hazardous condition may occur due to a power failure or product malfunction,
use a servo motor with a lock or external lock to prevent the condition.
Do not use the 24 V DC interface power supply for the lock.
Configure a lock circuit so that it is activated also by an external EMG stop switch.
Servo motor
Electromagnetic brake
B
RA
Contacts must be opened
withthe EMG stop switch.
Contacts must be opened when ALM
(Malfunction) or MBR (Electromagnetic
brake interlock) turns off.
24 V DC
When any alarm has occurred, eliminate its cause, ensure safety, and deactivate the alarm before
restarting operation.
Provide an adequate protection to prevent unexpected restart after an instantaneous power failure.
(6) Maintenance, inspection and parts replacement
CAUTION
With age, the electrolytic capacitor of the driver will deteriorate. To prevent a secondary accident due to a
malfunction, it is recommend that the electrolytic capacitor be replaced every 10 years when it is used in
general environment. Please contact your local sales office.
(7) General instruction
To illustrate details, the equipment in the diagrams of this Instruction Manual may have been drawn
without covers and safety guards. When the equipment is operated, the covers and safety guards must
be installed as specified. Operation must be performed in accordance with this Specifications and
Instruction Manual.
Lock
Contacts must be opened when ALM
(Malfunction) and MBR (Electromagnetic
brake interlock) turns off.
Refer to section 3.10.3 when wiring for the circuit configuration.

A -8
DISPOSAL OF WASTE
Please dispose a driver, battery (primary battery) and other options according to your local laws and
regulations. Please display or notify the final product as necessary.
EEP-ROM life
The number of write times to the EEP-ROM, which stores parameter settings, etc., is limited to 100,000. If
the total number of the following operations exceeds 100,000, the driver may malfunction when the EEP-
ROM reaches the end of its useful life.
Write to the EEP-ROM due to parameter setting changes
Write to the EEP-ROM due to device changes
Origin setting in absolute position detection system
STO function of the driver
This driver complies with the safety level SIL 3 of the international standard IEC 61508: 2010 for functional
safety.
When using the STO function of the driver, refer to chapter 13.
Compliance with global standards
For the compliance with global standards, refer to appendix 4.
«About the manuals»
You must have this Instruction Manual and the following manuals to use this servo. Ensure to prepare
them to use the LECSB2-T□safely.
«Wiring»
Wires mentioned in this Instruction Manual are selected based on the ambient temperature of 40 °C.
«U.S. customary units»
U.S. customary units are not shown in this manual. Convert the values if necessary according to the
following table.
Quantity
SI (metric) unit
U.S. customary unit
Mass
1 [kg]
2.2046 [lb]
Length
1 [mm]
0.03937 [in]
Torque
1 [N•m]
141.6 [oz•in]
Moment of inertia
1 [(× 10-4 kg•m2)]
5.4675 [oz•in2]
Load (thrust load/axial load)
1 [N]
0.2248 [lbf]
Temperature
N [°C] × 9/5 + 32
N [°F]

- 1 -
CONTENTS
1. FUNCTIONS AND CONFIGURATION 1- 1 to 1-16
1.1 Summary............................................................................................................................................. 1-2
1.2 Function block diagram....................................................................................................................... 1-3
1.3 Driver standard specifications............................................................................................................. 1-5
1.4 Combinations of driver and servo motors ........................................................................................... 1-7
1.5 Function list......................................................................................................................................... 1-8
1.6 Model designation............................................................................................................................. 1-11
1.7 Structure............................................................................................................................................ 1-14
1.7.1 Parts identification ...................................................................................................................... 1-14
1.8 Configuration including peripheral equipment................................................................................... 1-15
2. INSTALLATION 2- 1 to 2- 7
2.1 Installation direction and clearances................................................................................................... 2-3
2.2 Keep out foreign materials.................................................................................................................. 2-4
2.3 Encoder cable stress........................................................................................................................... 2-5
2.4 Inspection items.................................................................................................................................. 2-5
2.5 Parts having service lives.................................................................................................................... 2-6
2.6 Restrictions when using this product at altitude exceeding 1000m and up to 2000m above sea level2-6
3. SIGNALS AND WIRING 3- 1 to 3-69
3.1 Input power supply circuit.................................................................................................................... 3-3
3.2 I/O signal connection example............................................................................................................ 3-6
3.2.1 Position control mode................................................................................................................... 3-6
3.3 Explanation of power supply system................................................................................................. 3-15
3.3.1 Signal explanations..................................................................................................................... 3-15
3.3.2 Power-on sequence.................................................................................................................... 3-16
3.3.3 Wiring CNP1, CNP2, and CNP3................................................................................................. 3-17
3.4 Connectors and pin assignment........................................................................................................ 3-19
3.5 Signal (device) explanations ............................................................................................................. 3-22
3.6 Detailed explanation of signals.......................................................................................................... 3-32
3.6.1 Position control mode................................................................................................................. 3-32
3.6.2 Speed control mode ................................................................................................................... 3-37
3.6.3 Torque control mode .................................................................................................................. 3-39
3.6.4 Position/speed control switching mode ...................................................................................... 3-42
3.6.5 Speed/torque control switching mode ........................................................................................ 3-44
3.6.6 Torque/position control switching mode..................................................................................... 3-46
3.7 Forced stop deceleration function..................................................................................................... 3-47
3.7.1 Forced stop deceleration function .............................................................................................. 3-47
3.7.2 Base circuit shut-off delay time function..................................................................................... 3-49
3.7.3 Vertical axis freefall prevention function..................................................................................... 3-50
3.7.4 Residual risks of the forced stop function (EM2)........................................................................ 3-50
3.8 Alarm occurrence timing chart .......................................................................................................... 3-51
3.8.1 When you use the forced stop deceleration function ................................................................. 3-51
3.8.2 When you do not use the forced stop deceleration function ...................................................... 3-52
3.9 Interfaces .......................................................................................................................................... 3-53
3.9.1 Internal connection diagram ....................................................................................................... 3-53