UNI-T Programmable Linear DC Power Supply UDP3305S-E 4-Channel 328W

Description

Product Overview

The UNI‑T UDP3305S‑E is engineered as a high‑performance, four‑channel linear DC laboratory power supply that meets the demanding requirements of research laboratories, educational institutions, and advanced development environments. With a total output capacity of 328 watts, the unit provides ample power for a wide range of electronic circuits, from low‑power sensor prototypes to medium‑scale power‑electronics modules. The front‑panel features a 4.3‑inch high‑definition LCD that presents real‑time voltage, current, and power metrics, allowing users to monitor and adjust settings with precision and confidence.

Each channel is independently programmable, offering distinct voltage and current ranges: Channel 1 and Channel 2 each support 0–30 V at up to 5 A, Channel 3 provides 0–6 V at up to 3 A, and Channel 4 delivers a fixed 5 V at 2 A. The resolution of 10 mV for voltage and 1 mA for current ensures fine‑grained control, while the accuracy specifications of less than 0.3 % + 20 mV for voltage and less than 0.2 % + 5 mA for current guarantee reliable, repeatable results across the full operating range.

Connectivity is a core strength of the UDP3305S‑E. Integrated USB 2.0, RS‑232, and Ethernet (LAN) interfaces enable remote operation, data logging, and integration into automated test rigs. The device also includes a digital I/O module that can be programmed to trigger external equipment, read status signals, or synchronize multiple instruments, expanding its utility in complex test setups.

Robust construction and thoughtful ergonomics are evident in the unit’s design. The chassis, measuring 9 × 14 × 7 inches and weighing 22 pounds, combines a compact footprint with a sturdy metal enclosure that resists vibration and accidental impacts. The power supply comes equipped with a USB printing cable, a digital I/O plug, a power cord, and a multi‑function accessory kit, ensuring that users have the essential tools to start testing immediately out of the box.

Usage

Designed for versatility, the UDP3305S‑E excels in a variety of laboratory scenarios. In academic settings, instructors can use the four independent channels to demonstrate fundamental concepts such as voltage division, current limiting, and load regulation, while students gain hands‑on experience with programmable power sources. In research labs, the ability to store up to 2048 programmable steps and execute up to 99 999 cycles makes the unit ideal for long‑duration stress testing, battery‑charging experiments, and power‑efficiency measurements.

Industrial engineers benefit from the seamless integration capabilities offered by the USB, RS‑232, and LAN ports. The power supply can be linked to supervisory control and data acquisition (SCADA) systems, enabling centralized monitoring of multiple devices across a production floor. Its digital I/O ports allow synchronization with oscilloscopes, signal generators, and automated test equipment, creating a cohesive test environment that reduces setup time and minimizes human error.

Field technicians who require portable yet reliable power solutions will appreciate the compact size and rugged build of the UDP3305S‑E. Whether calibrating equipment on-site, troubleshooting power‑related failures, or performing on‑the‑fly adjustments to prototype circuits, the unit delivers consistent performance without the need for a dedicated bench space.

Why Choose Us

UNI‑T has a long history of delivering high‑quality test and measurement equipment, and the UDP3305S‑E continues that tradition with meticulous engineering and rigorous quality control. Every unit undergoes comprehensive functional testing, calibration verification, and environmental stress screening before it leaves the factory, ensuring that customers receive a product that meets or exceeds the stated specifications.

Beyond the hardware, UNI‑T provides extensive software support. The accompanying PC application offers an intuitive graphical interface for configuring channel parameters, creating custom waveform lists, and exporting measurement data in common formats such as CSV and XML. Firmware updates are delivered over the USB or LAN connection, allowing users to benefit from performance enhancements and new features without additional hardware investment.

Customer satisfaction is reinforced by a responsive technical support team and a comprehensive warranty that covers defects in materials and workmanship. Users can access detailed documentation, video tutorials, and a knowledge base that addresses common questions, ensuring a smooth onboarding experience and long‑term reliability.

Key Features

• Four independent channels with flexible voltage and current ranges for diverse testing needs
• High resolution of 10 mV / 1 mA and tight accuracy (<0.3 % + 20 mV, <0.2 % + 5 mA) for reliable measurements
• USB, RS‑232, and LAN connectivity enable remote control, data logging, and integration into automated systems
• Programmable list and delay functions support up to 2048 steps and 99 999 cycles, simplifying complex test sequences
• Robust construction, compact footprint, and comprehensive accessories ensure durability and ease of use
• Digital I/O module provides trigger and status capabilities for synchronized multi‑instrument setups
• Dedicated technical support and firmware updates keep the device current and reliable over its lifespan

FAQ

What is the maximum power output per channel?

Channel 1 and Channel 2 can each deliver up to 30 V at 5 A, which equals 150 W per channel. Channel 3 provides up to 6 V at 3 A (18 W), and Channel 4 supplies a fixed 5 V at 2 A (10 W). The combined total output does not exceed the unit’s overall rating of 328 W.

Can the power supply be controlled remotely?

Yes. The UDP3305S‑E includes USB 2.0, RS‑232, and Ethernet (LAN) interfaces. Using UNI‑T’s free PC software or standard SCPI commands, users can adjust settings, retrieve measurements, and run programmed sequences from a remote workstation or integrate the unit into larger automated test rigs.

How does the digital I/O function work?

The digital I/O module provides configurable input and output pins that can be programmed to trigger external equipment, read status signals, or synchronize multiple channels. This feature is especially useful for creating coordinated test scenarios where timing and event detection are critical.

Is there a warranty or after‑sales service?

UNI‑T offers a standard one‑year limited warranty covering defects in materials and workmanship. In addition, the company provides technical support via phone, email, and an online knowledge base, as well as free firmware updates to ensure the device remains up‑to‑date.

What safety certifications does the unit have?

The UDP3305S‑E complies with international safety standards, including CE marking for European markets and FCC compliance for the United States. It also meets IEC 61010‑1 requirements for laboratory equipment safety.