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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Order Code | S30301-NA |
| Rated Supply Voltage | 3 × 208 V –10 % to 480 V +10 %, 50/60 Hz |
| Rated Input Power (S1) | 2.5 kVA |
| Continuous Output Current | 5 Arms (208/230 V), 4 Arms (400 V), 3 Arms (480 V) |
| Peak Output Current (≈5 s) | 7.5 Arms |
| Max. DC Bus Voltage | 900 V |
| Overvoltage Switch-off | 800 VDC (typical) |
| Current Controller Bandwidth | > 1.2 kHz |
| Switching Frequency | 8 kHz (16 kHz with reduced current) |
| Onboard Fieldbus | CANopen |
| Expansion Options | None installed (NA = base unit) |
| Dimensions (W × H × D) | 70 × 278 × 171 mm (approx., without connectors) |
| Enclosure | IP20 |
| Weight | Approx. 2.7 kg |
4. Product Introduction
The Kollmorgen SERVOSTAR 343 (order code S30301-NA) is a compact digital servo amplifier from the S300 series. It operates from a three-phase 208–480 VAC supply and delivers continuous currents of 3–5 Arms depending on line voltage, with a peak capability of 7.5 Arms.
Motion-control engineers select this drive for space-constrained panels that require reliable torque, velocity, or position control of brushless servo motors. The base NA version includes onboard CANopen and supports a wide range of feedback devices. As a discontinued S300 configuration, remaining New Surplus units continue to support existing machines that depend on this exact current and voltage rating.
5. Installation & Configuration Guide
Stage 1: Pre-Installation Preparation (≈10–15 min)
⚠️ Safety First: Disconnect and lock out all AC power. Wait for the DC bus capacitors to discharge completely (verify with a multimeter).
Tools Required: ESD wrist strap, torque screwdriver, multimeter, appropriate motor and feedback cables, RS-232 or CAN interface for commissioning, smartphone for photos of existing wiring and switch settings.
Data Backup: Record the current drive parameters, node address, and motor data file using the Kollmorgen setup software.
Stage 2: Removing the Old Drive (≈10 min)
- Confirm the DC bus is fully discharged.
- Label and disconnect motor power, feedback, CANopen/fieldbus, digital I/O, and AC input power.
- Remove mounting hardware and carefully withdraw the drive.
- Inspect connectors and the mounting surface.
⚠️ Retain the old drive until the replacement has completed a successful test run.
Stage 3: Installing the New Drive (≈15 min)
- Verify the exact markings SERVOSTAR 343 and S30301-NA.
- Mount the drive securely (70 mm width footprint). Maintain adequate clearance for convection cooling.
- Reconnect AC input (observe phase sequence and voltage rating), motor power leads, feedback cable, and CANopen network.
- Set any rotary switches or address settings to match the previous unit.
Self-Checklist: [ ] Model confirmed [ ] Bus voltage discharged [ ] Motor phasing correct [ ] Shield connections terminated at the drive [ ] Grounding intact.
Stage 4: Power-On & Testing (≈15–20 min)
Pre-Power Check: Confirm correct three-phase voltage and absence of shorts. Verify motor and feedback connections.
- Apply control and bus power. Observe the three-character LED display for normal power-up.
- Establish communication via RS-232 or CANopen and verify the drive appears with the expected node address.
- Download the motor data file and perform a low-speed jog or torque test in a safe, limited-motion environment.
- Confirm continuous and peak current limits, feedback resolution, and any saved parameters.
- Run a short production cycle under load while monitoring temperature and fault status.
⚠️ Troubleshooting Note: Overvoltage or undervoltage faults usually indicate incorrect AC input or regen resistor sizing. Loss of CANopen communication is most often caused by address conflicts or termination issues. Never enable the drive with incorrect motor phasing.
343 S30301-NA
343 S30301-NA
6. Frequently Asked Questions (FAQ)
Q: Can the SERVOSTAR 343 S30301-NA be hot-swapped under power?
No. Always remove AC power and allow the DC bus to discharge completely before disconnecting or connecting any cables. Working on a live drive can destroy the power stage or create a shock hazard.
Q: Is this model obsolete, and is the stock genuinely new?
Yes, the S300 series in this configuration is discontinued. Available units are New Original (new surplus) stock that has been functionally verified. Quantities are limited.
Q: What is the direct replacement if S30301-NA stock is exhausted?
Later Kollmorgen AKD or AKD2G drives can provide equivalent or higher performance. Confirm current rating, voltage class, fieldbus (CANopen or alternative), feedback support, and physical mounting before substitution.
Q: Will I lose drive parameters when I replace the unit?
Parameters are stored in the drive’s non-volatile memory. Always back up the configuration file before removal. After installation, download the saved file or re-commission the axis.
Q: Why is the price lower than original Kollmorgen list price?
These are New Surplus units from secondary-market inventory. They provide the same form, fit, and function as original production drives and are fully tested, but they are no longer current-production catalog items.
Q: What does the “NA” suffix mean?
NA indicates the base unit with no expansion card installed and CANopen communication onboard. Optional cards (DeviceNet, PROFIBUS, SERCOS, EtherCAT, etc.) occupy the expansion slot and change the suffix.
Q: What continuous current can I expect?
At 3 × 208/230 V the continuous rating is 5 Arms. At 3 × 400 V it is 4 Arms, and at 3 × 480 V it is 3 Arms. Peak current is 7.5 Arms for approximately 5 seconds across all voltages.
