Mash LVT20 Series User manual

USER MANUAL
FOR LVT20 SERIES
VERSION 1.0
DEC 2020

MECON LVT20 SERIES
pg. 1
CONTENTS
1. INTRODUCTION……………………………………………………………………………………….2
2. SAFETY AND WARNING……………………………………………………………………………2
3. DIMENSION AND INSTALLATION……………………………………………………………..3
4. SPECIFICATIONS AND FEATURES……………………………………………………………..5
5. STANDARD CONNECTION DIAGRAM……………………………………………………….6
6. PIN ASSIGNMENT AND FUNCTIONS…………………………………………………………7
7. INTERNAL FAULT INDICATION…………………………………………………………………12
8. COMMISSIONING……………………………………………………………………………………13

MECON LVT20 SERIES
pg. 2
1. INTRODUCTION
MECON LVT20 series of controllers are designed to drive brushless DC motors using hall sensor
feedback. Open loop as well as closed loop operation of BLDC motors up to 3000W is possible.
This manual describes all the functionalities of the controller and also describes about various
operating modes and fault conditions.
2. SAFETY AND WARNING
Please read this manual carefully before using this product. Operating the controller in conditions
other than specified, may permanently damage the controller.
Only specialists, having appropriate skill and training in working with motors and controllers, may
install and commission the controller.
▪Do not wire the controller while the power is ON.
▪Changing the wires while operation may damage the controller. After switching OFF, wait
until the capacitors have discharged.
▪There is no polarity-reversal protection in the controller, polarity-reversal may lead to short-
circuit.
▪Installing a proper fuse in the supply line is highly recommended.
▪This controller contains components that are sensitive to human body electrostatic.
▪Supply wires, motor wires and all control wires should be firmly connected.
Operating conditions:
▪Ambient operating temperature: (-5 to 40°C).
▪Protection class: IP20.
NOTE

MECON LVT20 SERIES
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3. DIMENSION AND INSTALLATION
LVT20A Controller dimensions:

MECON LVT20 SERIES
pg. 4
LVT20B Controller dimensions:

MECON LVT20 SERIES
pg. 5
4. SPECIFICATIONS AND FEATURES
ELECTRICAL DATA
VALUE
Operating voltage.
Rated current (cont.).
36 VDC to 55 VDC.
LVT20A: 8A.
LVT20B: 15A.
LVT20C: 31A.
LVT20D: 62A.
Overload capacity.
Operating temperature.
Operating modes.
Feedback.
Communication.
Digital inputs.
Analog / PWM input.
PWM frequency.
RPM range.
Protections.
150% (60s).
Up to 80°C (heatsink).
Open loop, Closed loop PID control.
Hall sensors.
RS-485 Interface.
Enable, Direction, Stop.
Speed (0 - 5V) / (1 - 10kHz).
16 kHz.
0 –20000 RPM.
Over voltage, Under voltage, Over current, Over temperature, Motor
stall protection.

MECON LVT20 SERIES
pg. 6
5. STANDARD CONNECTION DIAGRAM
Connection diagram for LVT20B, LVT20C, LVT20D:
Connection diagram for LVT20A:

MECON LVT20 SERIES
pg. 7
6. PIN ASSIGNMENT AND FUNCTIONS
LVT20B pin assignment:
C1 C2 C3 C4 C5
Connector C1
Function
Pin1 | DC +
Pin2 | DC –
Pin3 | PHA
Pin4 | PHB
Pin5 | PHC
Positive supply voltage (48 VDC).
Negative supply voltage (GND).
Motor phase A.
Motor phase B.
Motor phase C.
Connector C2
Function
Pin1 | Vcc
Pin2 | GND
Pin3 | hall A
Pin4 | hall B
Pin5 | hall C
Pin6 | sv GND
Pin7 | sv SIGNAL
Positive supply voltage for hall sensors (+5V).
Hall sensor GND.
Motor Hall A input signal (+5V).
Motor Hall B input signal (+5V).
Motor Hall C input signal (+5V).
External potentiometer GND.
Analog input signal to control the rotational speed of the motor.
Potentiometer (0 –5V) | PWM signal (1 –10kHz).

MECON LVT20 SERIES
pg. 8
Pin8 | +5V
Pin9 | enable
Pin10 |direction
Pin11 | stop
Common supply for external potentiometer, enable, direction and stop.
Logic signal to enable or disable the motor rotation.
Logic ‘low’: Motor stops rotating and deccelerate as per the set deceleration.
Logic ‘high’: Motor starts to rotate as per the set speed and will accelerate as
per the set acceleration.
Sets the direction of the motor. Changing the direction of the motor while in
rotation will deccelerate the motor till zero and accelerate the motor in other
direction as per the set acceleration and deceleration.
Logic ‘low’: CW.
Logic ‘high’: CCW.
Stops the rotation of the motor without deceleration.
Logic ‘low’: Motor starts to rotate as per the set speed and will accelerate as
per the set acceleration.
Logic ‘high’: Motor stops
Connector C3
Function
Pin1 | +5V
Pin2 | +5V
Pin3 | n.c
Pin4 | RS-485
Pin5 | RS-485
Pin6 | n.c
Pin7 | GND
Pin8 | GND
Positive supply (for external mash electric keypad).
--
RS-485 B terminal.
RS-485 A terminal.
--
GND (for external mash electric keypad).

MECON LVT20 SERIES
pg. 9
LED C4
Function
GREEN LED
RED LED
Indicates the power status of the controller.
Indicates the fault conditions of the controller.
SWITCH C5
Function
RESET
Resets the controller in case of ‘fault latch’ condition. Do not attempt to reset the
controller in normal condition or while the controller is in operation.
While resetting the controller in case of any fault condition, make sure that the
speed reference is set to zero.