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Diamond Point International

Contec DIO-24DY-USB - Digital I/O Terminal for USB2.0

16 Channels of Bidirectional Unisolated TTL Level Digital I/O


Contec's DIO-24DY-USB is a USB 2.0-compatible digital I/O terminal, which can be connected to a USB interface of a PC to provide bi-directional input and output digital signals (LVTTL (3.3V) level). Up to 24 channels of digital signals (both input and output) are available. Input or output can be selected in a unit of eight channels by application software.

A Windows driver and LabVIEW library are available.

  • Each group consists of eight channels with three groups in total which provides 24 channels of bi-directional digital input/output.
  • Un-isolated LVTTL level (positive logic) I/O
  • Compliant with USB2.0/USB1.1 specifications and capable of a high-speed transfer (480Mbps)
  • Powered by the bus, enabling operation without an external power supply
  • Application software enables the switching of input and output settings
  • Adoption of terminal connector (with screws) enables easy wiring.


Digital I/O/Counter/Timers

I/Os24 bidirectional channels
Arranged in three banks of eight channels
Direction set per bank
InputsLVTTL-level (Positive logic)
Input resistance: 33 Ohms
Response time: Within 200 nanosececonds
OutputsLVTTL-level (Positive logic)
Output rating: 3.3VDC 8mA
Response time: Within 200 nanosececonds
Connectors(s)14 pin (screw-terminal) plug header


ExpansionUSB specification 2.0/1.1 standard
ElectricalBus powered
5VDC, 250mA max
MechanicalConnector: 14 pin (screw-terminal) plug header
Size: 64(W) x 62(D) x 24(H) mm (exclusive of protrusions)
Cable: USB cable 1.8m, included
SoftwareWindows: Win32 API (Visual C# .Net, Visual Basic .Net, Visual C++ .Net examples), 32 or 64 bit architecture
OS Support:
• Windows 2000 (32 bit only)
• Windows XP, Vista, Server 2008, 7, 8, 8.1 (all 32 and 64 bit)
Data acquisition VI library for LabVIEW (VI-DAQ)
TemperatureTemperature range (operation): 0 to +50°C
Humidity10 - 90%RH (No condensation)
Weight70g (Not including the USB cable)
Safety/CertificationFCC, VCCI
Warranty1 Year

Ordering Details

DIO-24DY-USB 24 Ch LVTTL Level Bi-directional USB Digital I/O terminal
AccessoriesAPI-USBP(WDM) Windows version Driver Library for USB module (free download)
BRK-USB-Y Bracket for USB I/O Terminal products
CN6-Y14 14 pin Terminal connector(screw type) 6/set
VI-DAQ VI Library of data acquisition for LabVIEW (free download)