The UDP6952B is UNI-T's 600W high-current programmable DC switching supply — 60V at up to 25A continuous, sized for e-bike and light-EV motor drive testing, fast-charging stage prototyping and 48V industrial battery work.

Full programmable interface set: USB Device, USB Host, RS-232, RS-485, LAN with web control, and external analog I/O, with SCPI, Multi-SCPI and Modbus RTU command support. Auto-range output delivers any V/I combination within the 600W envelope from a single instrument. Built-in 4½-digit DVM monitors a second voltage point on the DUT without an external instrument. Slope control configures rise/fall rates independently in voltage-slope (VSR) and current-slope (ISR) modes for soft start/stop. Remote sense (S+/S−) compensates for IR drop on the test leads. List mode and delayer functions program up to 512 voltage/current/time groups, stored to internal Flash or USB.

Across the Design. Debug. Deploy.™ Lifecycle

Design. Sourcing the bench supply for high-current 60V power-electronics development is the first commit. 600 W at 60 V / 25 A with 1 mV / 0.1 mA resolution covers the envelope this work needs, with the four-wire sense and slope-controlled startup that DUT-protective work requires from the first turn-on. Programmable from the front panel or remotely — list mode, slope control, OVP/OCP, and DVM are first-class controls, not buried menu options.

Debug. At validation, the 4½-digit DVM and 512-group list mode replace a second DMM and an external sequencer. Capture power-up profiles, automate sweeps, and record DUT-side voltage drift while sourcing — without leaving the supply's front panel or rebuilding the test harness.

Deploy. Production go/no-go testing runs over LAN with SCPI, Multi-SCPI, or Modbus RTU. The web server gives a shared bench remote access without a host-software install. RS-485 multi-machine networking scales the station as the throughput requirement does. From first prototype to production verification — design, debug, deploy.

• 600W Auto-Range Output (0–60V, 0–25A) — Flexible V/I combinations within rated power. One supply handles multiple test configurations.
• High Accuracy & Low Ripple — 1 mV/0.1 mA resolution with low ripple and noise for sensitive DUT testing.
• OVP/OCP Protection — Independent over-voltage and over-current protection with configurable thresholds protects devices under test.
• List Mode & Delay Function — Program voltage/current sequences with configurable timing for automated test profiles and battery charge simulation.
• Slope Control — Configurable rise/fall rates for soft start/stop, preventing inrush damage to sensitive loads.
• Remote Sense — Four-wire sensing compensates for voltage drop in test leads, ensuring accurate voltage at the load terminals.
• Built-In DVM — Independent digital voltmeter for monitoring a second voltage point without additional equipment.
• Web Remote Control & Multi-Machine — Browser-based control via LAN. Master/slave communication for series/parallel multi-unit configurations.

Front-Panel Interface

A 4.3-inch true color LCD shows set voltage and current alongside actual output values, with output power computed and displayed in real time. The numeric keypad sets values directly without menu diving; the rotary encoder fine-tunes when a small adjustment is faster than typing. Soft-keys map to the function actually in use — list mode, slope, OVP/OCP, or DVM — instead of burying them in nested menus. Output enable is a dedicated hardware button, always visible, never one click away from a keystroke mistake.

Remote Sense

Long test leads drop voltage. At higher currents, the drop is no longer a rounding error — a 10 A draw across a meter of 16 AWG returns roughly 50 mV less to the load than the supply set. The UDP6900 series corrects for this with four-wire remote sense: connect the output's + and − terminals to the load through the current-carrying leads, then run a separate pair from S+ and S− directly to the device under test. The supply servo's regulation point shifts from its own terminals to the load's terminals — and the 1 V SENSE compensation headroom keeps the rail accurate where it actually matters.

Over-Voltage/Over-Current Protection (OVP/OCP)

Independent over-voltage and over-current thresholds, both set from the front panel. When either limit trips, the supply latches output off and posts the trigger on the LCD — the kind of unambiguous fault state that matters when a DUT failure during overnight characterization could otherwise damage hardware or lose a test run. Thresholds persist across power cycles and survive front-panel lock for unattended operation.

List Output and Delay Function

List mode programs up to 512 voltage/current/time groups, executed in sequence — useful at 25 A continuous for low-voltage inverter input-stage characterization (walking through 12 V, 24 V, and 48 V system levels at full current draw), for high-current DC-DC converter input sweeps, and for controlled-current battery discharge profiles. The delay function programs output on/off sequencing for load-cycling reliability tests. Files save to Flash or USB in .lst.csv and .dly.csv formats — Excel-editable.

Slope Mode Options

At 25 A continuous, an uncontrolled current rise into an inductive or low-impedance load is a real fault risk. Three slope modes prevent it. Normal mode steps directly to the set value. Voltage Slope (VSR) ramps voltage at a configurable rate. Current Slope (ISR) ramps current step-by-step — critical for motor-drive bench setups, low-voltage inverter input stages, and any DUT where startup di/dt determines whether the DUT runs or fails the SOA gate.

Auto Range Functionality

600 W of working envelope, with output reconfiguration across the V/I plane on demand: 60 V at 10 A for high-side characterization, 25 A at 24 V for low-voltage inverter input stages, or anything in between. At 25 A continuous, the UDP6952B handles current ranges that fixed supplies in the 100–200 W class simply cannot reach — without sacrificing the upper voltage when the bench needs it.

Built-in Digital Voltmeter (DVM)

A built-in 4½-digit voltmeter measures DC voltage on a separate rear-panel pair, displayed alongside the supply's own readbacks on the LCD. For a two-rail bench scenario — measuring the load's regulated DC at the same time the supply is sourcing it — the DVM eliminates a second instrument. Range is 0.001–65.000 V on the 60 V models, up to 160 V on the UDP6933B and UDP6953B.

Multiple Main Menu Options

The main menu structure is shallow by design. Five top-level sections — Monitor, System Settings, User Group, Output Settings, Language — each one or two presses from the front panel. Monitor displays live V/I/P/DVM with per-channel alarms when set conditions deviate. Output Settings configure operating mode, power-up output, and slope. System Settings hold backlight, sound, RS-232/network, and a factory-default restore. The menu hierarchy never exceeds two levels — depth defeats front-panel work, and the UDP6900 doesn't ask the operator to memorize trees.

Computer Software and Remote Control

The UDP6900 series ships with free PC control software — UNI-T's UDP9000 host application, common across the programmable PSU line. Set voltage and current remotely, log readbacks to disk, sequence list and delay programs, and automate complete characterization runs without writing a SCPI parser. For scripted environments, the supply speaks SCPI, Multi-SCPI, and Modbus RTU natively over USB-Device, RS-232, RS-485, or LAN — pick the bus that fits the test station.

Multi-Machine Communication

RS-485 networking links multiple UDP6900 supplies to a single host. Master/slave configurations enable series-stack for higher voltage or parallel-stack for higher current — useful for multi-rail bench setups or when a single test station needs more total power than one chassis provides. One SCPI session, many supplies, synchronized output.

Web Control

LAN connection brings up an embedded web server — open the supply's IP in any browser to set parameters, run list and delay programs, and configure system settings. No vendor application install on the host machine, no driver headache when the bench runs Linux or a tablet workstation. For shared lab benches and remote-monitored automation, the browser interface is often the cleanest path.

Applications

High-Current Motor Drive & EV Bench

25 A continuous at 60 V handles e-bike and light-EV motor drive testing, fast-charging stage prototyping, 48V mild-hybrid automotive electronics, and 600W industrial-scale bench work. Slope control prevents current overshoot during DUT power-up.

Battery Charging & Pack Emulation

Programmable CC/CV with list mode runs realistic charge profiles up to 25A. The supply can also act as a battery emulator with controlled output impedance for downstream charger and BMS testing.

Industrial Power Electronics Bench

600W output suits 48V/60V industrial DC equipment, high-power DC-DC converter dev, and the higher-end of low-voltage power-electronics work. Multi-machine RS-485 scales the bench for multi-unit configurations.

Test Lab & Production Test

Full SCPI over USB, RS-232, RS-485, and LAN integrates into automated test systems. Web control via browser. External analog interface for multi-supply coordination. Internal Flash + USB storage for test profiles.

Specifications

Options & Accessories

Included in box:

• Power cord
• English download guide
• multi-language safety manual
• calibration report (COC)

FAQ's

What does auto-range mean?

Auto-range means the supply delivers any voltage/current combination within the rated 600W envelope. The UDP6952B can output 60V at reduced current or 25A at reduced voltage — the power limit is the constraint, not fixed V/I maximums independently.

What's the difference between the UDP6700 and UDP6900B series?

This family (UDP6900B) sits above the UDP6700, adding auto-range output, slope control, built-in DVM, web control over LAN, RS-485 for multi-machine networking, USB Device, Modbus RTU, and external analog control. UDP6700 provides the core CV/CC + list-mode + remote-compensation feature set with RS-232 SCPI at a lower price.

Can I connect multiple UDP6900B units for higher power?

Yes. Multi-machine communication via RS-485 enables master/slave configurations — connect units in series for higher voltage or parallel for higher current, controlled from a single master or via SCPI commands.

What's included with the UDP6952B?

The UDP6952B ships with the instrument, power cable Test leads and sense leads available separately.