Comprehensive Product Summary – ADLINK USB‑2401

---

### 1. Product Overview

Product Name: USB‑2401
Model: USB‑2401
Series: USB DAQ (Data Acquisition) Series
Article Number: USB‑2401
Manufacturer: ADLINK Technology, Inc.
Part Number: 50‑1Z101‑1000
Manual Revision: 2.00 (April 27, 2012)

The ADLINK USB‑2401 is a high‑precision, 24‑bit, 4‑channel simultaneous‑sampling universal input USB data acquisition (DAQ) module. It is designed for direct connection to a wide range of sensors and transducers, including voltage, current, thermocouple, RTD, strain gauge, load cell, and resistive devices. The module is fully USB bus‑powered, eliminating the need for an external power supply, and features built‑in signal conditioning, removable screw‑down terminals, and a lockable USB cable for secure connectivity.

The USB‑2401 is part of ADLINK’s USB DAQ family, providing high‑resolution measurement capabilities for laboratory, industrial, and research applications. It supports Windows‑based operating systems and integrates seamlessly with ADLINK’s UD‑DASK and DAQPilot drivers, as well as the U‑Test utility for out‑of‑the‑box operation.

---

### 2. Key Features

- High‑Resolution Measurement: 24‑bit A/D resolution across four differential analog input channels.
- Simultaneous Sampling: All four channels sample concurrently, ensuring synchronized data acquisition.
- Universal Input Capability: Supports voltage, current, thermocouple, RTD (2‑, 3‑, 4‑wire), strain gauge, load cell, and resistance measurements.
- Built‑in Signal Conditioning: Integrated excitation sources and cold junction compensation (CJC) for direct sensor interfacing.
- Sampling Rate: Programmable from 20 samples per second (SPS) up to 2 kS/s per channel.
- USB 2.0 High‑Speed Interface: Provides fast data transfer and plug‑and‑play connectivity.
- USB Bus Powered: Operates entirely from the USB port (5 V @ 400 mA).
- Digital I/O Functionality: 4 digital inputs and 2 digital outputs, TTL‑compatible, configurable as GPIO, timer/counter, or PWM.
- Removable Screw‑Down Terminals: Simplifies wiring and maintenance.
- Lockable USB Cable: Ensures secure connection in industrial environments.
- Multi‑Mount Stand: Supports desktop, DIN‑rail, or wall mounting.
- Software Support: Compatible with ADLINK UD‑DASK, DAQPilot SDK, and U‑Test utility.
- Operating Systems: Windows 7, Vista, XP.
- Applications: Automotive testing, laboratory research, biotech measurement, and general I/O control.

---

### 3. Technical Specifications

Analog Input
- Channels: 4 differential, simultaneous sampling
- Resolution: 24 bits
- Sampling Rate: 20, 40, 80, 160, 320, 500, 1000, 2000 samples/sec
- Input Coupling: DC
- FIFO Buffer: 4 k samples
- Input Impedance: 1.009 MΩ (voltage mode), 249.5 Ω (current mode)
- Data Transfer: Programmed I/O or continuous (USB bulk transfer)

Supported Measurement Modes and Ranges
| Mode | Supported Type | Actual Range |
|------|----------------|--------------|
| Voltage | ±25 V, ±12.5 V, ±2.5 V, ±312.5 mV | ±25 V, ±12.5 V, ±2.5 V, ±312.5 mV |
| Current | ±20 mA | 2.5 V equivalent |
| Thermocouple | K, J, N, R, S, B, T, E | ±78.125 mV |
| RTD (3‑wire, 4‑wire) | Pt100, Pt1000 | ±2.5 V |
| Half‑Bridge | 120 Ω, 350 Ω | Max. 30 mV/V |
| Full‑Bridge | 120 Ω, 350 Ω | Max. 30 mV/V |
| 2‑Wire Resistance | Up to 30 kΩ | ±2.5 V |

Excitation Sources
- Voltage Excitation: 2.5 V (for bridge modes)
- Current Excitation: 0.5 mA (RTD mode), 0.05 mA (resistance mode)
- Cold Junction Compensation (CJC): ±0.5 °C accuracy after 15‑minute warm‑up

Environmental and Power
- Operating Temperature: 0 to 55 °C
- Storage Temperature: –20 to 70 °C
- Relative Humidity: 5%–95%, non‑condensing
- Power Requirement: 5 V @ 400 mA (USB bus powered)

Physical Dimensions
- Size: 156.5 (L) × 114 (W) × 41 (H) mm (6.16 × 4.49 × 1.61 in.)
- Weight: Approx. 0.5 kg (without stand)
- Connectors: Two 20‑pin removable screw‑down terminals
- Interface: USB 2.0 Mini‑B with lockable connector

---

### 4. Functionality

The USB‑2401 operates as a universal input DAQ module capable of acquiring high‑resolution analog data from multiple sensor types. Each channel can be independently configured for a specific measurement mode, allowing mixed‑signal acquisition within a single device.

Operation Principle:
- The module’s 24‑bit sigma‑delta ADCs perform simultaneous sampling across all channels.
- Built‑in signal conditioning circuits handle voltage scaling, current shunt conversion, bridge excitation, and temperature compensation.
- Data is transferred to the host PC via USB 2.0 using programmed I/O or continuous bulk transfer.
- The FPGA core manages timing, calibration, and digital I/O control.

Use Cases:
- Precision temperature monitoring using thermocouples or RTDs.
- Strain and load measurement in material testing.
- Current loop signal acquisition in industrial control systems.
- Voltage and resistance measurement in laboratory instrumentation.
- General‑purpose digital I/O control and PWM signal generation.

Compatibility:
- Fully compatible with ADLINK’s UD‑DASK driver library and DAQPilot SDK.
- Integrates with LabVIEW™, MATLAB®, and other Windows‑based environments.
- U‑Test utility allows immediate operation without programming.

---

### 5. Components & Accessories

Included Standard Accessories:
- Two 20‑pin removable screw‑down terminal blocks
- 2‑meter USB Type‑A to USB Mini‑B cable with lockable connector
- Multi‑function module stand (desktop, rail, or wall mount)
- Rail‑mount kit
- User’s manual and driver CD

Optional Accessories:
- RST‑20P: Additional pair of 20‑pin removable screw terminals
- USB‑2M‑L: 2‑meter lockable USB cable (Type‑A to Mini‑B)

---

### 6. Installation & Setup

Requirements:
- Windows 7/Vista/XP operating system
- USB 2.0 high‑speed port capable of supplying 400 mA
- Installation of ADLINK UD‑DASK or DAQPilot driver package

Setup Procedure:
1. Install the driver and U‑Test utility from the ADLINK All‑in‑One CD or website.
2. Connect the USB‑2401 to the PC using the supplied lockable USB cable.
3. Upon first connection, the firmware loads automatically (approx. 6 seconds).
4. The module’s LED changes from amber to green when ready.
5. Verify device recognition in Windows Device Manager.
6. Configure the device ID (rotary switch 1–8) to differentiate multiple modules.
7. Use U‑Test or DAQPilot to configure channels, sampling rate, and input type.

Mounting Options:
- Desktop: Place module in stand for stable operation.
- DIN‑Rail: Attach stand to rail using included kit.
- Wall Mount: Secure stand with four 3.4 mm screws.

---

### 7. Performance & Capabilities

Analog Performance:
- Resolution: 24 bits (2’s complement format)
- Sampling Rate: 20–2000 SPS per channel
- Input Noise (typical, 25 °C): 9–120 LSB depending on mode and rate
- Gain Drift: 1.3–3.7 ppm/°C (voltage/current modes)
- Offset Drift: <0.3 ppm/°C typical
- Common‑Mode Voltage Range: ±25 V (voltage mode), ≤24 V (current mode)
- Overvoltage Protection: ±30 V (voltage mode), 60 mA (current mode)

Digital I/O Performance:
- Channels: 4 DI, 2 DO (TTL, 3.3/5 V compatible)
- Logic Levels:
- Input Low ≤ 0.8 V, Input High ≥ 2.0 V
- Output Low ≤ 0.5 V @ 10 mA, Output High ≥ 2.6 V
- Modes:
- 4‑CH DI + 2‑CH DO
- 1‑CH 32‑bit Timer/Counter (80 MHz internal / 10 MHz external clock)
- 1‑CH PWM Output (0.01 Hz–5 MHz, 1–99% duty cycle)

Timer/Counter Capabilities:
- 10 programmable modes including gated event counting, pulse‑width measurement, and PWM generation.
- Software‑controlled start, gate, and polarity.
- 32‑bit counter width for extended measurement range.

Limitations:
- Only one digital I/O mode (GPIO, GPTC, or PWM) can be active at a time.
- USB bus power limits external excitation current capacity.
- Accuracy decreases slightly at maximum sampling rates.

---

### 8. Standards & Compliance

- USB Interface: USB 2.0 High‑Speed compliant
- Environmental Compliance:
- RoHS (Restriction of Hazardous Substances)
- WEEE (Waste Electrical and Electronic Equipment)
- Safety: Designed for CE and FCC compliance (industrial EMC standards)
- Calibration: Factory‑calibrated; recommended recalibration interval: 1 year
- Operating Environment: 0–55 °C, 10–90% RH non‑condensing

ADLINK emphasizes environmental responsibility, ensuring all manufacturing processes and materials minimize ecological impact. End‑of‑life disposal should follow local recycling and recovery regulations.

---

### 9. Additional Information

Warranty & Support:
- Standard manufacturer warranty (contact ADLINK for regional terms).
- Calibration service available through authorized ADLINK service centers.
- Technical support via global offices in Taiwan, USA, China, Japan, Korea, Singapore, India, France, and Israel.

Maintenance:
- No user‑serviceable parts inside.
- Annual recalibration recommended for accuracy retention.
- Keep module dry, ventilated, and free from vibration or excessive heat.

Software & Updates:
- UD‑DASK: 32/64‑bit kernel driver for custom DAQ applications.
- DAQPilot: Graphical SDK for LabVIEW™, MATLAB®, and Visual Studio environments.
- U‑Test: Free utility for immediate testing, data logging, and FFT analysis.
- Software updates and documentation available at [www.adlinktech.com](http://www.adlinktech.com).

Safety Precautions:
- Disconnect USB before wiring or maintenance.
- Avoid exposure to moisture or high temperature.
- Use only the supplied or equivalent lockable USB cable.
- Mount securely to prevent mechanical stress on connectors.

---

### Summary

The ADLINK USB‑2401 is a compact, high‑accuracy, and versatile USB data acquisition module engineered for precision measurement and sensor interfacing. Its 24‑bit resolution, simultaneous sampling, and universal input capability make it ideal for laboratory research, industrial automation, and scientific experimentation. With built‑in signal conditioning, flexible mounting, and comprehensive software support, the USB‑2401 delivers a complete, ready‑to‑deploy DAQ solution for engineers and researchers requiring reliable, high‑resolution data acquisition over USB.