GE IC800SSI228RD2 S2K Resolver Servo Drive Board

Description

Product Introduction & Engineering Value

Ask any plant engineer who maintained automated packaging lines in the early 2000s, and they’ll tell you the S2K series was an absolute workhorse for standalone positioning. The GE Fanuc IC800SSI228RD2 packs both the motion planner and a 230 VAC 28A drive stage into a single chassis, bypassing the need for separate motion cards or external tuning amplifiers.

Equipped with a resolver feedback interface (RD2) and an onboard DeviceNet protocol port, this module executes high-speed position, velocity, and torque loops directly on its internal DSP. Its ability to store local motion programs makes it an ideal drop-in replacement when keeping standalone machinery running without rewriting master PLC logic.

Technical Specifications

Field Application & The “Trench” Experience

During an un-scheduled stoppage at a blow-molding facility, the main container indexer jammed, blowing the IGBT output stage on an old S2K controller. The master controller was an older PLC communicating with three downstream drives via DeviceNet. Sourcing a matching drive was critical, as swapping to a modern drive family would require rewriting the entire motion profile in new software. Our team provided a pre-tested IC800SSI228RD2. The field tech restored the motor parameter set over serial, verified resolver alignment on the index axis, configured the DeviceNet MAC ID, and had the line running bottles again before the shift ended.

Niche Application Scenarios:

• Rotary Die Cutter Synchronization: Managing precise position registration and flying-shear cuts on continuous paperboard feeders.
• Automated Palletizer Push-Bars: Driving high-torque AC servo motors in dusty environments where optical encoders frequently fail, relying on rugged resolver feedback.
• Index Table Transfer Stations: Executing local S-curve acceleration profiles independent of master PLC scan rates.

IC800SSI228RD2

IC800SSI228RD2

Transparency SOP: QA & Testing

• Step 1: Power Stage & Bus Inspection — Electrolytic capacitors are tested for proper ESR levels; power bridge rectifiers and IGBT modules undergo diode-check testing.
• Step 2: Resolver Interface Verification — Connected to a test-bench MTR-series resolver motor to confirm clean excitation signals, zero phase jitter, and accurate position feedback tracking.
• Step 3: DeviceNet Communication Sweep — Tapped into an active DeviceNet network trunk to verify node address assignment, baud rate negotiation (125k/250k/500k), and I/O assembly data swapping.
• Step 4: Continuous Thermal & Load Run-In — Operated on an automated test rig under a 4-hour dynamic duty cycle at rated current to verify heatsink thermal dissipation and drive stability.

The Veteran’s Tech Trap Guide

• ⚠️ The RD2 vs. RS1 Feedback Swap: Do not confuse the RD2 model suffix with RS1 or RP2 models. The RD2 hardware interface is specifically pinned for Resolver feedback. Wiring a quadrature or serial encoder directly to an RD2 unit will fail to read position and trip an immediate drive fault on power-up.
• PRO TIP (DeviceNet Baud Rates): S2K drives on DeviceNet networks auto-baud or run on fixed dip-switch/software settings. If the drive fails to connect to the bus master (DeviceNet LED flashing red), double-check that your subnet baud rate and node address match the old unit’s exact configuration before condemning the hardware.
• ⚠️ Resolver Phase Angle Calibration: When replacing a drive on a motor with a newly aligned resolver, perform an absolute commutation offset calibration via S2K software. A phase mismatch between the resolver zero and motor stator will cause violent shaft runaway or immediate overcurrent trips.

Dynamic FAQ

Q: What does the “RD2” suffix in part number IC800SSI228RD2 stand for?

A: The RD2 designation indicates that the unit is equipped with a resolver feedback interface and a DeviceNet communications port.

Q: Can I use this controller with standard incremental optical encoders?

A: No, this specific model requires resolver feedback (RD2). For encoder-based motors, you must use an encoder-compatible variant from the S2K hardware series (such as an RS1 or RP2 model).

Q: What software program is used to set motor parameters and program motion profiles?

A: S2K series controllers are configured using GE Fanuc S2K Motion Developer software connected via the serial commissioning port.

Q: Is a separate 24VDC logic supply required to keep the control board alive during mains power disconnects?

A: The drive contains internal power regulation, but supplying auxiliary control power allows the feedback loop and network communications to remain active even when mains AC power is dropped for safety interlocks.