Oriental Motor UDK5114N-A13 2-J3-33095 0020-21705 Super Vexta 5-Phase Stepper Driver

Technical Dossier

Product Details And Specifications

Oriental Motor Super Vexta Series: Comprehensive Module Range and Technical Overview

The Oriental Motor Super Vexta series represents one of the most widely deployed 5-phase stepper motor and driver systems in global heavy industry. Installed across chemical processing plants, nuclear facility auxiliary systems, petroleum refining equipment, semiconductor fabrication lines, and precision machine tools, the Super Vexta platform established the benchmark for high-resolution open-loop motion control from the 1980s through the 2010s. The UDK5114N driver unit — specifically the variant UDK5114N-A13 2-J3-33095 0020-21705 — is a 5-phase microstep driver designed to operate with Oriental Motor's PK and PKP series 5-phase stepper motors, delivering smooth motion at resolutions up to 1000 steps/rev in half-step mode and higher in microstep configurations. Its compact DIN-rail-compatible form factor and robust bipolar constant-current drive circuitry made it a standard component in multi-axis automation panels throughout Asia, Europe, and North America.

The Evolution of Super Vexta Architecture

Oriental Motor introduced the Super Vexta designation to differentiate its high-torque, 5-phase stepper motor systems from the earlier Vexta 2-phase line. The architectural evolution proceeded through three distinct generations:

Generation 1 (1980s–early 1990s): Analog driver boards with DIP-switch step resolution selection. Drivers such as the UDK5107N and UDK5114N used discrete transistor output stages. Compatibility was limited to matched motor frame sizes; cross-series substitution required careful current rating verification.

Generation 2 (mid-1990s–2000s): Introduction of the CVD (Compact Vector Drive) and RKD series alongside continued UDK production. These drivers added RS-485 communication options and expanded microstep divisors (up to 1/250 step). The UDK5114N-A13 belongs to this transitional generation, retaining analog I/O while incorporating improved MOSFET output stages for reduced heat dissipation.

Generation 3 (2010s–present): The AZ (Absolute Mechanical Encoder) and AR series replaced most UDK-class drivers in new designs. These units integrate closed-loop feedback, EtherNet/IP and MECHATROLINK-III fieldbus support, and multi-step data storage. Facilities running legacy UDK5114N installations face a compatibility gap: AZ/AR series motors use different connector pinouts and encoder protocols, making direct drop-in replacement impossible without rewiring and PLC parameter changes.

For plants committed to maintaining existing UDK5114N-based axes without full system redesign, sourcing verified replacement units remains the most cost-effective lifecycle strategy.

Super Vexta Full Catalog & Functionalities (SKU List)

The following SKUs represent the core Super Vexta 5-phase driver and associated module range. All models listed are confirmed Oriental Motor catalog items.

UDK5107N: 5-phase driver, 0.75A/phase, for PK series size 14–23 motors
UDK5114N: 5-phase driver, 1.4A/phase, standard frame, DIN-rail mount
UDK5114N-A13: UDK5114N variant with A13 option (pulse/direction input, 24VDC logic)
UDK5128N: 5-phase driver, 2.8A/phase, for larger PK/PKP frame motors
UDK5128N-A: UDK5128N with enhanced EMI filtering option
UDK5214N: Dual-axis 5-phase driver, 1.4A/phase per axis, compact panel footprint
UDK5228N: Dual-axis 5-phase driver, 2.8A/phase per axis
UDX5114N: Upgraded UDK5114N successor with expanded microstep settings
UDX5128N: Upgraded UDK5128N successor, 2.8A/phase, enhanced thermal management
CVD514-K: Compact 5-phase driver, 1.4A/phase, for PKP series, screw terminal I/O
CVD528-K: Compact 5-phase driver, 2.8A/phase, PKP series compatible
RKD514L-A: 5-phase driver with built-in indexer, 1.4A/phase, RS-485 interface
RKD528L-A: 5-phase driver with built-in indexer, 2.8A/phase, RS-485 interface
PK543AW: 5-phase stepper motor, size 23, 0.9°/step, matched to UDK5114N
PKP243D15A: 5-phase stepper motor, size 23, high-torque, PKP series, UDK5114N compatible
PKP264D28A: 5-phase stepper motor, size 24, 2.8A/phase, high-inertia load rated
PK596AW: 5-phase stepper motor, size 34, 0.72°/step, for UDK5128N pairing

Sourcing Hard-to-Find & Obsolete Super Vexta Parts

The UDK5114N series entered end-of-life status in Oriental Motor's standard catalog during the mid-2010s. Replacement units are no longer manufactured, and authorized distributor stock has been exhausted in most regions. DriveKNMS maintains a dedicated inventory program for discontinued Super Vexta driver modules, sourced through verified industrial surplus channels, decommissioned equipment recovery, and long-term storage partners in Japan, Germany, and the United States.

Each unit offered by DriveKNMS is individually serialized and cross-referenced against Oriental Motor's original production records where available. For the UDK5114N-A13 2-J3-33095 0020-21705 specifically, DriveKNMS stocks both tested-functional units and units supplied as-is for repair-depot use. Customers requiring certified functional units receive a test report generated on Oriental Motor-compatible 5-phase motor test benches prior to shipment.

Quality Control for the Super Vexta Range

5-phase stepper drivers present specific test challenges compared to 2-phase or servo drive units. The UDK5114N's internal architecture includes a 5-phase sequencer ASIC, five independent MOSFET half-bridge output stages, and an optocoupler-isolated pulse/direction input stage. Failure modes specific to this design include sequencer ASIC latch-up from ESD events, MOSFET gate driver degradation from capacitive load cycling, and optocoupler LED current decay causing input sensitivity loss.

DriveKNMS applies the following test protocol to all Super Vexta driver units:

1. Static continuity check: All motor output terminals verified for correct phase resistance and isolation from chassis ground.
2. No-load energization: Unit powered at rated 24VDC logic supply; all five phase outputs verified for correct sequencing under pulse input.
3. Loaded motor run test: Driver connected to a matched PK-series 5-phase motor under controlled inertial load; step accuracy verified at 500 pps and 5000 pps.
4. Thermal soak: Unit operated at 80% rated current for 30 minutes; case temperature and output current stability logged.
5. Input sensitivity verification: Pulse/direction input threshold tested at minimum and maximum specified voltage levels.

Units passing all five stages are classified as Grade A (Tested Functional). Units passing stages 1–2 only are classified as Grade B (Electrically Intact, Not Load-Tested) and priced accordingly.