Pacific Scientific 6440-001-K-N

Product Name

Microstepping Indexer/Drive Unit

Product Description

The Pacific Scientific 6440-001-K-N is a high-performance integrated microstepping indexer and drive that provides economical, precise stepper motor control with a simple programming interface.

Category:
Description
Technical Specifications
  • Input Power: 120/240 VAC, 50/60 Hz
  • Input Fuse: 5 A Slo-Blo, 250 VAC
  • Output Current: 0.625 A to 5.0 A RMS adjustable
  • Drive Topology: Two-phase bipolar chopper current-regulated
  • Communication: RS-232, RS-422, RS-485 at 9600 bps
  • Program Memory: 1792 bytes non-volatile memory
  • Operating Temperature: 0 °C to +50 °C
  • Storage Temperature: -40 °C to +85 °C
  • Humidity: 10% to 90% non-condensing
  • Insulation Resistance: 100 MΩ minimum at 500 VDC
  • Dielectric Strength: 500 VAC for 1 minute
Functional Features
  • Single-letter mnemonic programming language for fast application development
  • Trapezoidal velocity profiles with programmable ramp rates
  • Fixed and variable resolution microstepping modes
  • Digital Electronic Damping suppresses mid-speed resonance
  • Idle current reduction minimizes motor heating at standstill
  • Comprehensive fault protection for over-voltage, under-voltage and short circuits
Application Scenarios
  • Automated assembly machinery
  • Material handling indexing conveyors
  • Food and beverage processing equipment
  • Printing and marking systems
  • Industrial test and measurement equipment
Performance Parameters
  • Step rate range: 0.08 to 19,000 steps/second
  • Current regulation tolerance: ±5% of set value
  • Program execution latency: <2 ms
Material Composition
  • Chassis: Steel with black powder coat finish
  • Heat sink: Extruded aluminum alloy
  • Circuit components: Industrial-grade semiconductors
  • Terminals: Screw terminal blocks and D-sub connectors
Structural Features
  • Vertical chassis with side-mounted heat sink
  • Front panel LED indicators for power and fault status
  • DIP switch bank for current and feature configuration
  • Front-accessible connectors for simplified wiring
Working Principle

The unit executes motion programs received via serial interface or stored in internal non-volatile memory. The indexer block generates step pulse trains and direction signals based on programmed motion parameters. The power drive stage amplifies these signals into controlled bipolar current for stepper motor windings using 20 kHz PWM chopping. Digital Electronic Damping algorithm optimizes current waveforms to minimize motor vibration and resonance. Discrete I/O interfaces connect to external sensors and actuators for closed-loop machine sequencing.

Installation Requirements
  • Mount on vertical surface with minimum 50 mm side clearance for airflow
  • Connect AC supply through properly rated circuit breaker
  • Use shielded cable for serial communication
  • Set output current via DIP switches to match motor rating
Usage Notes
  • Do not operate without proper over-current protection on AC input
  • Allow 10-minute warm-up for optimal current accuracy
  • Never connect or disconnect motor while power is applied
  • Verify motor inductance compatibility with drive output stage
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