Kollmorgen S20360-SRS S200 Series AC Servo Drive

The Kollmorgen S20360-SRS is an all-digital, high-performance AC servo drive belonging to the legacy S200 family (previously manufactured under the Danaher Motion brand). Operating on a 120/240 V AC supply, this single-axis drive delivers a continuous output current of 3.0 A RMS (9.0 A peak) and a continuous output power of 1,100 W. The “SRS” suffix specifies that this model features an integrated SynqNet digital communication interface and supports Kollmorgen’s proprietary Smart Feedback Device (SFD) protocol. This combination enables closed-loop velocity and torque control with plug-and-play electronic motor nameplate detection.

Commercial & Availability Status

• Product Condition: New Original (New Surplus) or Refurbished (Fully Tested).

• Warranty Period: 12-month comprehensive warranty from the date of invoice.

• Lead Time: Ships within 2 to 4 business days. Expedited shipping options are available for breakdown situations.

• Pricing Notice: Price varies based on stock tier (New vs. Refurbished). Contact our technical sales desk for a formal, line-item quotation.

Technical Specifications

Engineering Insights & Field Installation Guide

Field Engineering Note: During a critical midnight retrofit, it is common to confuse the S20360-SRS with its sister model, the S20360-VTS. While they share identical power stages and chassis dimensions, the -VTS relies on standard $\pm 10\text{ V}$ analog commands, whereas the -SRS will only initialize via a SynqNet network manager. They are not drop-in functional substitutes without software reconfiguration.

Keep-Alive Logic Configuration

The module features a split-power topology. Wiring the control logic power separately to terminals C1 and C2 allows the drive to retain its absolute feedback position, bus diagnostic state, and SynqNet network synchronization even when the main AC lines (L1, L2, L3) are dropped during an E-stop or safety door isolation sequence.

Smart Feedback Device (SFD) & Battery Care

The -SRS model interfaces directly with Kollmorgen rotary motors containing an SFD. This connection transfers the electronic motor nameplate data over a robust serial link, which completely automates current loop tuning parameters. If the system utilizes multi-turn absolute encoders that rely on a backup battery, monitor the drive diagnostics closely. A low battery will trigger a distinct error latch.

Diagnostic LED Blink Code Interpretation

The front-facing status LED uses a repeating pulse code to identify faults. When troubleshooting an inactive drive axis, count the consecutive blinks before the pause interval:

• 2 Blinks (Motor Over-Temp): The motor winding PTC thermistor has reached ≥155∘C. Verify duty-cycle constraints, check for binding mechanics, or ensure external cooling paths are unobstructed.

• 3 Blinks (Drive Over-Temp): The internal heatsink temperature has exceeded 100∘C. This indicates inadequate cabinet airflow or a failing drive cooling fan.

• 4 / 5 Blinks (I2t Limitation): The RMS current-time threshold has been breached. The drive is being commanded to work past its continuous thermal capacity (often due to sudden acceleration ramps or mechanical jams).

• 7 Blinks (Bus Over-Voltage): The internal DC bus has crossed $410\text{ V DC}$. This typically points to high regenerative energy pumped back into the drive during sharp deceleration. To resolve, increase deceleration times or install an external regeneration braking resistor.

• 9 Blinks (Motor Phase Short): Instantaneous phase-to-phase or phase-to-ground short circuit detected at the J2 connector during drive enablement. Megger the motor power cable and check insulation resistance ($>500\text{ M}\Omega$).

Frequently Asked Questions

Can I run a standard incremental encoder on the S20360-SRS? The baseline S20360-SRS is optimized for SFD feedback. To use alternative options like conventional quadrature encoders or resolvers, verify if your unit is equipped with secondary auxiliary feedback option boards or check the model nomenclature via the OEM manual to ensure matching line receiver hardware.

How do I address a 6-blink error code on this specific drive? A 6-blink sequence indicates that the Smart Feedback Device battery backing up the absolute position data has dropped below $3.0\text{ V}$. Replace the coin-cell battery within the system loop while keeping the control power energized to prevent losing your absolute machine datum positions.