Features

• DC bus voltage 12-35 VDC motor supply (including

ripple)

• Switch selectable motor current from 0.4–3.5

amps/phase

• Switch selectable full or half step

• Automatic 50 idle current reduction

• Optically isolated 5 VDC inputs, step, direction

and enable

• Enable input to turn off current to the motor.

• On-board oscillator generates step pulses and

accel/decel ramps

• On-board trimpot or external speed adjustment

• 122 watts of usable power

• Screw terminal connectors

• MOSFET, dual H-bridge, inaudible PWM amplifier

• 3 state, pulse width modulated current control,

switching at 20–30 KHz.

• Drives 4, 6 or 8 lead size 11, 14, 17 or 23 step

motors

• CE compliant

Description

The 3535O step motor driver is a full or half step

drive, step phase sequencer with MOSFET three

state switching amplifiers and optoisolated circuits.

This drive has a built in ramping pulse generator

(oscillator) with adjustable speed, acceleration and

deceleration. Oscillator speed range is 400–5,000

Hz. Speed can be set from on-board trimpot or external

pot.

A jumper allows you to select the internal oscillator.

In oscillator mode, the pulse input becomes a run/

stop signal: when this signal is set high, the motor

accelerates to a preset speed and slews. Lowering

the input signal causes the drive to decelerate to

rest.

The amplifier regulates motor current by chopping

at a constant, inaudible frequency. Phase current is

selected from 32 levels by a DIP switch.