Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | S20360-SRS |
| Series | Danaher Motion / Kollmorgen SERVOSTAR S200 |
| Feedback Type | Resolver (SRS suffix) |
| Continuous Output Current | 3 A RMS |
| Peak Output Current | Verify against OEM datasheet; S200 family spans up to 48 A peak |
| Input Voltage | 120–240 VAC, 50/60 Hz (single/three-phase, configuration dependent) |
| DC Bus Option | 20–90 VDC on S200 family drives |
| Speed Loop Bandwidth | Up to 800 Hz |
| Current Loop Bandwidth | 3–5 kHz |
| Control Modes | Torque, velocity; optional indexing/SynqNet |
| Command Inputs | ±10 V analog, step/direction, discrete I/O |
| Communication | RS-232 setup/diagnostics; SynqNet on equipped variants |
| Feedback Resolution | Up to 24-bit family capability; verify per motor/option |
| Operating Temperature | Typically 0 to +40 °C ambient; derating may apply |
| Standards | UL 508C, CE, EN 50178, EN 61800-3, SEMI F47 |
| Mounting | Panel/cabinet mount, book-size format |
Product Introduction
The S20360-SRS is the workhorse you pull out of a legacy packaging line or indexing station when the original drive gives up and nobody remembers the tuning parameters. It is a single-axis Danaher Motion / Kollmorgen S200 drive, and the “-SRS” suffix means it expects a resolver on the motor, not an EnDat or incremental encoder.What keeps this drive in spare cabinets is its 3 A continuous output with a 3–5 kHz current loop and up to 800 Hz speed-loop bandwidth. That is enough stiffness for most light machine tools, feeders, and pick-and-place axes without dragging a larger cabinet drive into the job. The resolver interface is the real field advantage: resolvers do not care about oil mist, vibration, or long cable runs the way glass encoders do. I have replaced encoder-feedback drives with S20360-SRS units on washdown-adjacent equipment and never had the customer call back about feedback faults. Just make sure the resolver wiring matches; the SRS variant will not accept an EnDat motor without hardware changes.
Quality SOP & Tech Pitfalls
The Lab Report (SOP)
- Visual and counterfeit check: confirm S20360-SRS label, serial number, and Danaher/Kollmorgen branding.
- Connector inspection: check power terminals, motor output contacts, resolver connector, RS-232 port, and DIN latches.
- Live bench test: apply rated 120/240 VAC through an isolation transformer and variac; verify DC bus charge and LED status.
- Communication check: connect via RS-232 and confirm the drive responds in MPI/S200 software.
- Parameter readback: verify model recognition, current limits, feedback type, and fault history.
- Motor run test: exercise torque and velocity mode with a compatible resolver motor; check following error and thermal behavior.
- Protection check: verify over-current, over-voltage, and over-temperature fault responses.
- Anti-static sealing: bag, tag, and pack with test records and nameplate photos.
The Engineer’s Warning (Pitfalls)
- The SRS suffix is not decorative. If the motor has an EnDat or incremental encoder, this drive will not read it. I once watched a technician spend two hours swapping resolver wires before realizing the motor was not resolver-equipped at all.
- Do not assume every S200 drive is SynqNet-capable. Some S200 units are analog/step-direction only unless the SynqNet option is present. Verify the exact hardware revision before promising network control.
- Save parameters to non-volatile memory. Downloading to RAM only means a power cycle wipes the tuning. I have seen a perfectly tuned axis revert to factory defaults after a weekend shutdown because nobody pressed Download NV.
- Check input voltage configuration. S200 drives can accept 120–240 VAC, but wiring and internal settings must match the supply. Feeding 240 VAC into a 120 VAC-configured unit is a short way to a replacement drive.
Installation & Configuration Guide
- Pre-Installation: Lock out/tag out the 120/240 VAC supply. Wait for DC bus discharge. Photograph the existing drive wiring, resolver connector pinout, DIP switches, and parameter screens. ⚠️ Do not disconnect the resolver while the drive is powered.
- Removal: Label motor phases U, V, W. Label resolver wires. Release DIN clips and remove the drive without stressing the terminal blocks.
- Installation: Seat the S20360-SRS firmly. Reconnect motor phases in the correct order; reversed phases cause immediate over-current faults. Connect the resolver firmly. Verify input voltage matches the drive configuration.
- Power-On & Testing: Apply power and check LED status. Connect via RS-232. Upload or verify parameters. Save to non-volatile memory. Jog the motor at low speed. Verify resolver feedback, direction, and fault-free operation before restoring full process speed.
Compatible Replacement Models
| Compatibility | Model | Notes |
|---|---|---|
| ✅ Drop-in | S20360-SRS | Same model, resolver feedback, 3 A continuous |
| ⚠️ Verify Feedback | S20360-VTS / S20360-CNS / S20360-DNS | Different feedback or option; may require motor or cable changes |
| ⚠️ Higher Current | S20660-SRS | 6 A-class drive; verify motor compatibility and tuning |
| ⚠️ Modern Replacement | Kollmorgen AKD / SERVOSTAR S700 | Requires new configuration, possible motor re-matching |
| ❌ Not Compatible | Non-resolver S200 variants | Cannot directly replace resolver feedback without hardware changes |
Frequently Asked Questions (FAQ)
Can I use this with an EnDat motor?
No. The S20360-SRS expects resolver feedback. For EnDat motors, you need the correct S200 variant or a different drive family.What software does it need?
Danaher Motion MPI or the S200 configuration tool, depending on firmware and option level. Verify compatibility before connecting to a production drive.Is SynqNet required?
No. The base drive supports analog torque/velocity and step/direction. SynqNet is an option and must be present on the hardware.Can I run it on 120 VAC single-phase?
Typically yes, but the drive configuration and current limits must match the supply. Verify against the nameplate and OEM manual.Does it support indexing?
Some S200 units support factory-programmed indexing or SynqNet-based motion. Confirm the option on the specific unit before relying on it.What condition do you supply?
New surplus, factory-sealed, or tested original used stock, depending on availability. Each unit is verified for model, power-up, communication, and feedback operation.What is the warranty?
Typically 12 months for non-human damage. Final terms depend on the order confirmation and unit condition.
