Allen Bradley2098-DSD-020XUltra3000 Digital Servo Drive, Single-Phase 100–240 V AC, 10 A Continuous / 20 A Peak, Indexing

Product Description

What this part is

An Allen-Bradley Ultra3000 digital servo drive, catalogue number 2098-DSD-020X. It is a single-axis drive taking a single-phase AC supply, rectifying it internally and delivering three-phase PWM output to a brushless AC servo motor with closed-loop position, velocity and torque control. Continuous output is 10 A rms with a 20 A peak capability, giving 2.0 kW continuous from a 230 V supply and 1.0 kW from a 115 V supply. This variant carries stand-alone indexing, so stored motion profiles are executed from the drive’s own memory.

Decoding the catalogue number

2098 is the Ultra family, DSD the Ultra3000 digital servo drive. 020 is the peak output current in amps, not the continuous figure — the continuous rating is half of it at 10 A rms, and reading the number as a continuous rating is the commonest sizing error on this range. The trailing letter block is the communication and function option: X is the indexing drive with discrete and serial control and no network card, -DN adds DeviceNet, and -SE is the SERCOS interface version used under a Logix motion controller. Those suffixes are not interchangeable, because the control path into the drive changes entirely.

Supply configuration

The input is single phase, 100 to 240 V AC at 47 to 63 Hz. That is the defining commercial feature of this frame and the reason it appears in machines with no three-phase supply at all — packaging heads, labellers, test rigs and laboratory equipment. It also sets the power ceiling: the same drive gives 1.0 kW on a 115 V supply and 2.0 kW on 230 V, so the available continuous power is a function of the supply the machine happens to have rather than of the drive alone.

What the indexing option buys

An indexing drive holds its own table of moves — distances, velocities, accelerations and dwells — and steps through them on discrete inputs or serial commands. That removes the need for a motion controller and a network for simple applications: a PLC output selects an index and starts it. The trade is that co-ordinated multi-axis motion, electronic camming and interpolation belong to the SERCOS variant under a Logix controller, and moving from indexing to co-ordinated motion later means changing the drive rather than the programming.

Quantity and configuration

1 Pc. Drive only. No servo motor, no motor power or feedback cables, no serial or DeviceNet cable, no external shunt or braking resistor, no line filter, no line reactor and no configuration software or licence.

Installation and setup notes

The drive is a panel-mounted unit on a flat backplate inside an enclosure, with the AC input, motor output and feedback connections separated on the front face and a serial port for configuration. Motor selection is declared during commissioning so the drive loads the correct motor model, and the feedback type must match the motor’s encoder or resolver. Regenerative energy is handled by the internal shunt for moderate duty; high-inertia decelerations call for an external shunt resistor, which is a separate item.

Interchange guidance

The 2098-DSD-020X-DN and 2098-DSD-020-SE share this drive’s current rating and frame but present different control interfaces, so they are related drives rather than replacements. Other numbers in the 2098-DSD range change the current rating, and the higher frames move to three-phase input. The Ultra3000 family is superseded in current Rockwell production by the Kinetix range, which uses different motors, feedback and configuration software, so an in-kind Ultra3000 is the practical repair for a running machine.