The UDP6942B is a 360W programmable DC switching supply at 60V/15A, sized for low-voltage motor drive testing, inverter input-stage qualification and DC-DC converter development where the 5A and 10A models in the family run short.

Auto-range gives flexible V/I combinations within the rated 360W envelope. 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. 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 higher-current 60V power-electronics work is the first commit. 360 W at 60 V / 15 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.

• 360W Auto-Range Output (0–60V, 0–15A) — 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 for motor-drive bench setups where the supply walks through 12 V, 24 V, and 48 V system levels with controlled timing, for inductive load characterization with current-step profiles, or for solenoid-pulse reliability testing. The delay function programs output on/off sequencing for cycling tests. Files save to Flash or USB in .lst.csv and .dly.csv formats — Excel-editable.

Slope Mode Options

Three configurable slope modes — Normal, Voltage Slope (VSR), and Current Slope (ISR). At 15 A continuous into inductive loads (motor windings, solenoid coils, transformer primaries), current-step transients can damage the DUT or trip the supply's OCP unnecessarily. ISR mode prevents both — ramping current at a configurable rate per second. VSR ramps voltage the same way for capacitive load startup.

Auto Range Functionality

Within the 360 W envelope, the UDP6942B delivers 60 V at 6 A for high-side load testing, 15 A at 24 V for low-voltage motor drive prototyping, or any combination in between. The output reconfigures across the V/I plane through the rated power, not a hardware range switch — making a single supply cover what would otherwise need a two-supply bench for inductive load development.

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

Motor Drive Bench (15A Class)

15 A at 60 V handles 12V/24V/48V brushless motor controller testing, low-voltage inverter input-stage characterization, and DC-DC converter dev where 5A and 10A models run short. Slope control prevents inrush damage to motor drivers during start-up testing.

Battery Charging & Test

Programmable CC/CV profiles simulate charging curves; list mode runs multi-step charge/discharge sequences for battery characterization. 15A current capability matches the charge rates of e-bike and small-EV battery packs.

Power Electronics Test Bench

15A at 60V suits gate-driver supplies, low-voltage point-of-load testing, and the bench currents that smaller models can't deliver. Auto-range gives flexible V/I combinations within the 360W envelope.

Small-Team Test Lab

Full SCPI over USB, RS-232, RS-485, and LAN integrates into VISA-based test frameworks. Multi-machine RS-485 supports synchronized series/parallel multi-unit configurations. Web control via browser for remote monitoring.

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 360W envelope. The UDP6942B can output 60V at reduced current or 15A 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 UDP6942B?

The UDP6942B ships with the instrument, power cable Test leads and sense leads available separately.