Allen-Bradley Ultra3000 2098-DSD-005X Digital Servo Drive

Technical Dossier

Product Details And Specifications

Allen-Bradley Ultra3000 Series Technical Notes

The Allen-Bradley Ultra3000 series (catalog prefix 2098-DSD) is a family of digital servo drives manufactured by Rockwell Automation. Deployed across continuous-process industries including petrochemical refineries, nuclear power auxiliary systems, pulp and paper mills, and automotive assembly lines, the Ultra3000 platform is one of the most widely installed servo drive architectures in North American and Asia-Pacific heavy industry. Its modular design, native SERCOS and DeviceNet communication options, and compatibility with the Logix control platform established it as the standard servo solution for motion-critical applications from the late 1990s through the 2010s. The series spans output current ratings from 2.5 A continuous to 35 A continuous, covering single-axis and multi-axis configurations.

The Evolution of Ultra3000 Architecture

The Ultra3000 platform was introduced by Rockwell Automation in the late 1990s as a successor to the Ultra100 and Ultra200 analog servo drive families. The initial 2098-DSD generation established a DSP-based digital current loop architecture, replacing analog velocity and torque loops with fully digital control at 8 kHz bandwidth. Early variants communicated via RS-232/RS-485 and required external motion controllers such as the IMC S-Class or 1756-M02AE ControlLogix motion module.

The second architectural generation introduced native SERCOS I fiber-optic ring communication (2098-DSD-xxxX suffix), enabling deterministic real-time position loop closure at 1 ms and 2 ms update rates directly from the 1756-SERCOS ControlLogix module. This eliminated the need for standalone motion controllers in most applications. A parallel branch introduced DeviceNet connectivity (2098-DSD-xxxX-DN suffix) for velocity and torque mode applications without full position loop requirements.

Ultra3000 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified production catalog of the Allen-Bradley Ultra3000 2098-DSD series. Each entry reflects a distinct hardware configuration. SKUs not confirmed in Rockwell Automation's published catalog are excluded.

2098-DSD-005X: 2.5 A continuous, 7.5 A peak, 120/240 VAC single-phase input, SERCOS interface, standard indexing firmware.
2098-DSD-010X: 5 A continuous, 15 A peak, 120/240 VAC single-phase input, SERCOS interface, indexing firmware.
2098-DSD-020X: 10 A continuous, 30 A peak, 120/240 VAC single-phase input, SERCOS interface, indexing firmware.
2098-DSD-030X: 15 A continuous, 45 A peak, 240 VAC three-phase input, SERCOS interface, indexing firmware.
2098-DSD-075X: 35 A continuous, 105 A peak, 240 VAC three-phase input, SERCOS interface, high-power frame.
2098-DSD-005X-DN: 2.5 A continuous, DeviceNet communication option, velocity/torque mode, 120/240 VAC single-phase.
2098-DSD-010X-DN: 5 A continuous, DeviceNet communication option, velocity/torque mode, 120/240 VAC single-phase.
2098-DSD-020X-DN: 10 A continuous, DeviceNet communication option, velocity/torque mode, 120/240 VAC single-phase.
2098-DSD-030X-DN: 15 A continuous, DeviceNet communication option, velocity/torque mode, 240 VAC three-phase.
2098-DSD-075X-DN: 35 A continuous, DeviceNet communication option, velocity/torque mode, 240 VAC three-phase.
2098-DSD-005X-SE: 2.5 A continuous, SynqNet Ethernet motion bus, Ultra3000i variant, 120/240 VAC single-phase.
2098-DSD-010X-SE: 5 A continuous, SynqNet Ethernet motion bus, Ultra3000i variant, 120/240 VAC single-phase.
2098-DSD-020X-SE: 10 A continuous, SynqNet Ethernet motion bus, Ultra3000i variant, 120/240 VAC single-phase.
2098-DSD-030X-SE: 15 A continuous, SynqNet Ethernet motion bus, Ultra3000i variant, 240 VAC three-phase.
2098-DSD-075X-SE: 35 A continuous, SynqNet Ethernet motion bus, Ultra3000i variant, 240 VAC three-phase.
2098-UWCPRG: UltraWare configuration and programming software, required for drive commissioning and parameter backup.
2090-XXLF-Dxx: Feedback cable assembly, flying-lead to drive feedback connector, compatible with all 2098-DSD variants.

Sourcing Hard-to-Find & Obsolete Ultra3000 Parts

For obsolete firmware versions (pre-3.x and 4.x series), DriveKNMS retains archived UltraWare-compatible parameter files and can assist with drive-to-drive parameter migration when replacing a failed unit with a different firmware revision.

Quality Control for the Ultra3000 Range

The 2098-DSD series uses a proprietary backplane-less architecture with a single-board DSP control card interfacing directly to the power stage via an internal ribbon bus. Failure modes specific to this design include DSP control board EEPROM corruption, IGBT gate driver isolation degradation, and resolver/encoder feedback interface signal conditioning failures.

DriveKNMS applies the following test protocol to all 2098-DSD units prior to shipment:

• Power stage insulation resistance test (megohm test at 500 VDC, phase-to-phase and phase-to-ground)
• DC bus capacitor ESR measurement and capacitance verification against OEM specification
• IGBT switching waveform capture at 10%, 50%, and 100% rated current
• Resolver interface signal integrity verification (amplitude, phase, and frequency response)
• SERCOS/DeviceNet/SynqNet communication ring initialization and node address assignment test
• Full UltraWare parameter upload, factory default restore, and re-upload cycle
• Thermal imaging under 75% rated load for 30-minute soak period