Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | PC834-001-N |
| Manufacturer | Pacific Scientific / Danaher |
| Product Type | Brushless Servo Drive |
| Position Resolution | 24-bit |
| Loop Bandwidth | 400 Hz |
| Continuous Torque | 0.5 to 48.5 Nm |
| Feedback Type | Digital Resolver-to-Digital (DRDC) |
| Communication | CANopen, Modbus, RS-232/485 |
| Mounting | Panel / DIN Rail |
| Protection | Over-current, Over-temp, Short-circuit |
Product Introduction
The Pacific Scientific PC834-001-N is a brushless servo drive from the PC800 series, designed for high-precision motion control in industrial automation. It converts resolver feedback into digital position data, enabling tight closed-loop control for packaging, robotics, and CNC applications.This drive delivers a 400 Hz current loop bandwidth and 24-bit position resolution, allowing sub-micron positioning accuracy even at high speeds. Unlike older analog drives, the Pacific Scientific PC834-001-N uses digital signal processing to auto-tune and reject mechanical resonance, reducing setup time and improving surface finish on machining centers.
Installation & Configuration Guide
Preparation (10 min)
Verify motor nameplate matches drive current/voltage ratings. Confirm feedback type is resolver (not incremental encoder). Gather torque screwdriver, shielded motor cable, and ESD strap. Check the drive’s DIP switch settings against the old unit before removal.Removal (5–10 min)
Disconnect AC power and wait 5 minutes for bus capacitors to discharge (verify with multimeter). Unplug motor, brake, and feedback connectors. Remove mounting screws and slide drive off DIN rail. Label all cables.Installation (10 min)
Mount Pacific Scientific PC834-001-N on clean, grounded DIN rail. Reconnect motor (U/V/W), brake, and resolver cables using shielded connectors. Ensure ground wire is terminated to drive chassis ground stud. Tighten power terminals to 1.2 Nm.Power-On & Test (10 min)
Apply control power first, then main AC. Observe LED status: green = ready, red = fault. Use Pacific Scientific Motion Manager software to read motor ID and verify feedback counts. Run auto-tune routine with load disconnected, then with load coupled.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Action |
|---|---|---|
| Red LED, no motion | Over-current fault | Check motor wiring for shorts; verify brake release |
| Oscillation / noise | Gain too high | Run auto-tune; reduce P-gain by 20% |
| Position drift | Resolver wiring error | Verify S1/S2/S3/S4 pinout; check shield ground |
| Comm timeout | CANopen baud mismatch | Confirm node ID and baud rate in software |
| Over-temp alarm | Insufficient cooling | Check fan operation; clean heatsink fins |
Dimensions, Mounting & Wiring Notes
- Form Factor: PC800 series slim-profile drive
- Mounting: Standard 35mm DIN rail or panel mount
- Terminal Note: Motor power uses 4-pin circular connector; feedback uses 9-pin D-sub.
- Clearance: 50mm top/bottom for airflow; do not stack drives without spacing plate.
FAQ
Is this a motor or a drive?
It’s a drive only. The Pacific Scientific PC834-001-N controls brushless servo motors but does not include one. You must pair it with a compatible PC800-series motor.I have a PC834-001-T, can I use this -N version?
Usually yes. The -N and -T suffixes often indicate minor revisions or regional certifications. Always verify firmware version and motor tuning parameters before swapping.Does it support Ethernet/IP?
No. This model supports CANopen, Modbus, and serial. For EtherNet/IP, you need the PC834-001-E variant or an external gateway.How do I know if my resolver is wired correctly?
Check the S1-S4 pins on the 9-pin D-sub. A common mistake is swapping S2 and S3, which causes 90° position error. I’ve seen this cause axis crashes more than any other wiring issue.What’s the lead time?
Refurbished units ship same-day if ordered before 2 PM EST. New surplus availability varies; contact sales for current stock.Can I use this with a non-Pacific motor?
Technically yes, if it’s brushless with resolver feedback and matches current/voltage ratings. But auto-tune and commutation alignment may require manual tuning. We recommend sticking with Pacific motors for plug-and-play reliability.Is the 48.5 Nm torque continuous or peak?
That’s the continuous torque range. Peak torque is typically 3x continuous for 1–2 seconds. Check the specific motor’s datasheet for exact peak values.
