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3. Key Technical Specifications
The Pacific Scientific 6420-001-N-N is an integrated microstepping drive and motion indexer engineered for 2-phase stepper motors, offering high smooth-motion resolution and programmable positioning.
| Parameter | Value |
| Part Number | 6420-001-N-N |
| Manufacturer | Pacific Scientific (Kollmorgen) |
| Product Family | 6420 Series Stepper Drives |
| DC Bus Input | 24 to 75 VDC |
| Output Current | 0.625 A to 5.0 A Peak (3.5 A RMS continuous) |
| Control Interfaces | Step & Direction inputs, Discrete I/O, RS-232 / RS-485 Serial Port |
| Microstepping Resolution | Selectable microstep resolution up to 50,000 steps/rev |
| Form Factor | Compact metal chassis enclosure with panel mounting flanges |
| Operating Temperature | 0°C to +50°C |
4. Product Introduction & Supply Chain Strategy
The Pacific Scientific 6420-001-N-N expands on standard drive platforms by incorporating built-in indexer functionality alongside digital microstepping power electronics. It can execute stored motion profiles triggered via discrete inputs or accept direct real-time step and direction signals from an external PLC or motion controller.
Maintaining an uninstalled 6420-001-N-N drive as New Surplus stock is a crucial strategy for keeping legacy automated lines running. Motion drives operating under high continuous current loads and thermal cycling face component wear over time, particularly in filter capacitors and power MOSFETs. Procuring a genuine New Surplus unit guarantees factory-fresh internal components, pristine connection ports, and immediate drop-in replacement without requiring cabinet modifications.
5. Installation & Configuration Guide
High Voltage & Inductive Energy Warning
Disconnect DC bus power and allow filter capacitors to fully discharge before connecting or disconnecting motor phase leads. Unplugging motor leads while the drive is energized will destroy output switching transistors.
1.Power Isolation & Voltage Check:Prerequisite.
Isolate main DC power feeds supplying the drive. Use a multimeter across the DC input terminals to verify that bus voltage has safely discharged below 5 VDC before touching terminals.
2.Panel Securing & Cooling Clearance:Mechanical Mounting.
Mount the 6420-001-N-N drive vertically onto a clean, unpainted metal mounting panel. Ensure at least 2 inches of unrestricted space above and below the heatsink for natural convection airflow.
3.Current & Resolution Configuration:DIP Switch Setup.
Set onboard DIP switches for motor phase current, idle current reduction, and microstep resolution in accordance with the 6420 hardware reference manual tables.
4.Landing Leads & Motion Testing:Wiring & Commissioning.
Connect motor phases (A, A-, B, B-), power feeds, and communication cables to their designated connectors. Reapply DC power and issue test commands via the serial interface or digital inputs to confirm smooth motor movement.
6420-001-N-N
6420-001-N-N
6420-001-N-N
6. Firmware/Software Versions & Upgrade Notes
- Hardware Configuration: Motor current, resolution, and basic drive behavior are set via DIP switches on the unit label.
- Serial Interface: RS-232 and RS-485 ports allow command streaming and motion profile programming via Pacific ScientificPacCom software.
- Shielding Integrity: Always route motor leads and power cables separately from low-voltage signal wiring to prevent electromagnetic interference.
7. Frequently Asked Questions (FAQ)
Q: Is this Pacific Scientific 6420-001-N-N drive genuinely new?
A: Yes, this unit is a Brand New Surplus item. It has never been installed in a cabinet or put into production service, and is preserved in anti-static protective packaging.
Q: What is the main difference between the 6410 and 6420 series drives?
A: While the 6410 is primarily a standalone drive board requiring external step and direction pulse generation, the 6420 series includes enhanced enclosure shielding, additional discrete I/O, and built-in indexing and serial communication capabilities.
Q: Can this drive run non-Pacific Scientific stepper motors?
A: Yes. The 6420-001-N-N works with standard 2-phase hybrid stepper motors from any manufacturer, provided the current and bus voltage ratings match the motor specifications.
Q: What warranty is provided with this unit?
A: Every Pacific Scientific 6420-001-N-N drive includes a certified quality verification report and a full 1-year replacement warranty from the date of shipment.
