DSD-075 current envelope
The 7.5 kW drive supplies 35 A continuously and 75 A intermittently, with 4290 µF bus capacitance.
Allen-BradleyUltra3000 Digital Servo Drives
Allen-Bradley 2098-DSD-075 / 2098-DSD-150 Ultra3000 high-power digital servo drives
Product Overview
Allen-Bradley 2098-DSD-075 / 2098-DSD-150 are 230 V-class Ultra3000 non-indexing digital servo drives with three-phase main input and separate auxiliary control input. They provide 7.5 kW and 15 kW continuous output at 230 V, respectively, for high-current servo axes. The catalog pair therefore belongs to one control family without sharing the same branch-circuit or thermal design.
Inside 2098-DSD-075 / 2098-DSD-150, the main AC input charges the DC bus, the inverter produces the motor output, and an auxiliary AC input powers the control section. Motor feedback, control I/O, and motor power retain distinct connections, while the internal shunt network handles part of the regenerative energy returned to the bus. The auxiliary supply does not energize the motor.
The exact model matters when sizing protection and regeneration for 2098-DSD-075 / 2098-DSD-150. Continuous output rises from 35 A to 65 A and intermittent output from 75 A to 150 A; the larger DSD-150 also uses a lower shunt resistance, more bus capacitance, and a higher continuous internal-shunt rating. External shunt selection must also remain within the documented resistance and power limits.
Technical Specifications
| Technical Item | 2098-DSD-075 / 2098-DSD-150 |
|---|---|
| Brand | Allen-Bradley |
| Product Type | High-power non-indexing digital servo drive |
| Brand Country | United States |
| Product Family | Ultra3000 |
| Main AC Input | 100–240 V rms, three-phase |
| AC Input Frequency | 47–63 Hz |
| Continuous Power at 230 V | 2098-DSD-075: 7.5 kW; 2098-DSD-150: 15 kW |
| Main Input Current at 230 V | 30 A rms / 46 A rms |
| Continuous Output Current | 35 A 0-peak / 65 A 0-peak |
| Intermittent Output Current | 75 A 0-peak / 150 A 0-peak |
| Bus Capacitance | 4290 µF / 7520 µF |
| Internal Shunt Resistance | 16.5 Ω / 9.1 Ω |
| Shunt Switching | On at 420 V DC; off at 402 V DC |
| Bus Overvoltage | 452 V DC |
| Internal Shunt Power | DSD-075: 50 W/10 kW; DSD-150: 180 W/18 kW continuous/peak |
| External Shunt Minimum | 16.5 Ω / 9 Ω |
| Auxiliary Input Current | 1.0 A at 115 V; 0.5 A at 230 V nominal |
| Commissioning Software Family | Ultraware |
Operating Characteristics
2098-DSD-075 / 2098-DSD-150 share the same 230 V Ultra3000 architecture, but their current, capacitance, and regenerative limits form two separate operating envelopes.
DSD-150 current envelope
The 15 kW drive supplies 65 A continuously and 150 A intermittently, with 7520 µF bus capacitance.
Auxiliary control input
Both units use an auxiliary AC input rated at 1.0 A from 115 V or 0.5 A from 230 V nominal, separate from the main three-phase power.
Diagnostics and Protection
Front-panel protection points
Regenerative and power-cycling checks on 2098-DSD-075 / 2098-DSD-150 must use the model-specific shunt hardware and main-input current.
Internal shunt limits
DSD-075 uses 16.5 Ω with 50 W continuous capability; DSD-150 uses 9.1 Ω with 180 W continuous capability.
Common bus thresholds
Both switch the internal shunt at 420 V DC and release it at 402 V DC, with bus overvoltage at 452 V DC.
Circuit-by-circuit diagnosis
Separate main power, auxiliary power, feedback, and control-I/O checks prevent a missing auxiliary supply from being misdiagnosed as a failed motor-power stage.
Frequently Asked Questions
What is the fastest way to prevent mixing DSD-075 and DSD-150 in a quotation within the 2098-DSD-075 / 2098-DSD-150 model group?
For 2098-DSD-075 / 2098-DSD-150, consider the following. Record the complete model and the motor continuous/peak-current requirement. DSD-075 is 35/75 A 0-peak, while DSD-150 is 65/150 A; the bus capacitance and shunt hardware also change, so “Ultra3000 230 V” is not enough identification.
When working with 2098-DSD-075 / 2098-DSD-150, why can the auxiliary AC input be present when the motor stage is not ready?
When 2098-DSD-075 / 2098-DSD-150 is involved, the auxiliary input powers the control section separately from the three-phase main input. It can support electronics and diagnostics, but it does not charge the main DC bus or provide motor-output energy.
What must be checked when repeated deceleration causes overvoltage trips for equipment identified as 2098-DSD-075 / 2098-DSD-150?
Calculate returned energy against the internal shunt and any approved external shunt. DSD-075 and DSD-150 share the 420/402 V switching thresholds but have different resistance, continuous-power, peak-power, and external-resistor limits. This guidance covers 2098-DSD-075 / 2098-DSD-150.
For 2098-DSD-075 / 2098-DSD-150, can the same input protection be assumed for both models?
On 2098-DSD-075 / 2098-DSD-150, no. Nominal main input current is 30 A for DSD-075 and 46 A for DSD-150 at 230 V, and their recommended protection differs. Protection should be selected for the exact drive and installation, not copied from the smaller model.
Why should feedback troubleshooting begin away from the motor terminals in relation to 2098-DSD-075 / 2098-DSD-150?
Feedback uses its own connector and low-level signal path. The motor terminals carry inverter output; probing or rewiring them as though they were feedback connections risks equipment damage and does not test the position-sensing circuit. The stated boundary applies to 2098-DSD-075 / 2098-DSD-150.
With 2098-DSD-075 / 2098-DSD-150 under review, what catalog information should be preserved in the software project?
With 2098-DSD-075 / 2098-DSD-150 under review, keep the full 2098-DSD-075 or 2098-DSD-150 identity together with motor data, current limits, auxiliary-power arrangement, and shunt configuration. That record keeps replacement hardware aligned with the commissioned axis and prevents the higher-current DSD-150 hardware from being substituted against DSD-075 protection and shunt sizing.
Advantageous Brands
Frequently supplied industrial automation brands
Moore Automation supplies widely used industrial automation brands across control, motion, process automation and machinery-monitoring product categories.
Control and motionAllen-Bradley, ABB, Siemens and Schneider Electric.
Process automationEmerson, GE, Honeywell and Yokogawa.
Machinery monitoringBently Nevada, EPRO and Vibro-Meter.
Safety and controlHIMA, Triconex, Foxboro and related product lines.
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