Omega Products 3540M User Manual

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MICROSTEPPING MOTOR DRIVES

3540M Series

3540M shown

smaller than

3540M

l Pulse and Direction Stepper Drive l 3.5 A, 40 Vdc l Switch Selectable Resolutions:

400, 1000, 2000 and 12,800 Steps/Rev

3540MO

l Stepper Drive with Digital

Oscillator

l 3.5 A, 40 Vdc l Resolution: 12,800 Steps/Rev l Speed Range Select:

High (25 rps) or Low (5 rps)

l 0 to 5V Analog Input, External

Speed Signal, Pot or Joystick

l Tach Output: 5 to 24V Optically

Isolated, 100 Pulses/Revolution

l Acceleration/Deceleration

Range, 1 to 250 Revs/Sec

Common Features

l DC Bus Voltage 12 to 42 Vdc

Motor Supply (Including Ripple)

l Switch Selectable Motor

Currents from 0.4 to 3.5 A/Phase

l Optically Isolated 5 Vdc Inputs

for Step, Direction and Enable

l Enable Input to Turn Off Current

to the Motor

l Screw Terminal Connectors l MOSFET, Dual H-Bridge,

Inaudible PWM Amplifier

l 3 State, Pulse Width Modulated

Current Control, Switching at 20 to 30 KHz

The 3540M/MO step motor drivers are microstepping drives with up to 12,800 steps per revolution, step phase sequencer with MOSFET three state switching amplifiers and optoisolated circuits. Both drives include 5 optically isolated inputs, and the 3540MO features external speed control, tach output, and internal pots for accel/decel rate along with high/low speed range selection.

Dimensions: mm (inch)

The 3540M is a step and direction drive, and includes an automatic feature (switch selectable) to reduce motor current by 50% when the motor is left at rest for more than one second. Additionally there is a switch selectable self-test which rotates the motor 100 steps/second.

The 3540M0 has an on-board oscillator which allows the motor speed to be controlled by an analog voltage or external joystick. This drive is idea for continuous motion applications such as mixers and blenders. Microstepping resolution is selectable by DIP switch on the 3540M.

⁄2 revolution in each direction at

actual size.

3540MO shown smaller than actual size.

SPECIFICATIONS

Amplifiers: Dual, bipolar MOSFET

H-bridge, pulse width modulated three state switching at 20 KHz; 12 to 42 Vdc

input; 0.4 to 3.5 A/phase output current, switch selectable in 0.1 A increments; 122 W maximum output power; automatic idle current reduction (switch selectable), reduces current to 50% of setting after one second

Inputs (3540M): Step, direction and enable, optically isolated, 5V logic; 5 mA/signal sink requirement ; motor steps on rising edge of step input;

0.5 µsec minimum pulse width; 2 µsec minimum set up time for direction signal

D-20

MOSFET

Amplifier

Step

Direction

Microstep

Sequencer

Current

0.4 to 3.5 A/phase

Step

resolution

1/2, 1/5,

1/10 or 1/64

50% idle

current

reduction

on/off

Dir

A+ A– B+ B–

To motor

Enable

Optical

Isolator

Self test

on/off

Step

12 to 42 Vdc

Optical

Isolator

Optical Isolator

run

direction

Common

Ext speed

12 to 42 Vdc

hi/lo speed

Current

0.4 to 3.5 A/phase

ext speed

Joystick

A+ A– B+ B–

To motor

enable tach out+ tach out-

50% idle

accel

speed

Microstep

Sequencer

MOSFET

Amplifier

Optical

Isolation

Digital Oscillator

Joystick Interface

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Inputs (3540MO): Run/stop (cw limit), direction (ccw limit), high/low speed and enable inputs are optically isolated, 5 to 24V logic. 3 to 15 mA input current; 2200 Ω input impedance; can be configured for sinking or sourcing signals

Recommended External Pot/Joystick Resistance: 1 to 5 K

Joystick Dead Zone: ±80 mV Potentiometer/Analog Signal

Dead Zone: 40 mV Speed Ranges (3540MO):

Low Speed Range: 0 to 5 rev/sec High Speed Range: 0 to 25 rev/sec Accel/Decel Range:

1 to 250 rev/sec/sec

Tach Output (3540MO):

Phototransistor, open collector, open emitter; 24V max, 20 mA max; 100 pulses per motor revolution, 50% duty cycle (square wave)

Physical: Mounted on 1⁄4 inch thick black anodized aluminum heat transfer chassis; 38.1 x 76.2 x 101.6 mm (1.5 x 3.0 x 4.0") overall; power on red LED; maximum chassis temperature: 70°C (158°F)

Connectors (3540M): European style screw terminal blocks Max Wire Size: 18 AWG

Motor: 4 position (A+, A-, B+, B-) DC Input: 2 position (V+, V-) Signal Input: 4 position (+5, STEP,

DIR, EN) Connectors (3540MO): European style

screw terminal blocks Power Supply and Motor: 6 position Wire Size: 12 to 28 AWG Signal Input: 10 position Wire Size: 16 to 28 AWG Motor: 4 position (A+, A-, B+, B-) Self Test (3540M): Switch selectable,

rotates motor 1⁄2 revolution each direction at 100 steps/second, half step mode

Microstepping (3540M): Four switch selectable step resolutions with 1.8° motor; half Step (400 steps/rev); (1000 s/r); 1⁄10 step (2000 s/r); 1⁄64 step (12,800 s/r)

Microstepping (3540MO): 1⁄64 step (12,800 s/r) with 1.8° motor; pure sine waveform

CE Mark: Complies with EN55011A and EN50082-1(1992)

OPTIONAL ACCESSORIES Power Supply (Required for Drive

Operation): Recommended:

OMPS150A24; 24 Vdc, 6.3 A; see omega.com/ps_series

⁄5 step

3540M

3540MO

D-21

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