USB bus powered, Relay controller, 3 contacts Form C, 10A 250V

SKU:: 149
Manufacturer:: Tokyo Devices
Model Number:: IWT303-3C
EAN:: 4560457400441
Released on:: Oct 2013
Category:: Relay and Digital I/O
Series:: IWT3X3

A general-purpose USB-controlled relay module. 12V, 24V, AC 100V, etc. can be turned on and off via USB. A free control command line program is available.

A Product released in 2013, with a proven track record of long-term operation. It adopts industrial-grade components from the manufacturer for relays, terminal block terminals, and more.
It can handle contact capacities of up to 10A・250VAC, making it ideal for controlling commercial power sources or 12V lines via USB.
Also available is the 1-contact model (IWT303-1C). An optional metal case (TDCS002) is available.
It is a domestically designed product, capable of customizations and long-term supply to meet various needs. Orders of 1000 units or more are accepted. Please inquire for details.

IWT303 Series Specifications

Relay Current Capacity: Up to 10A (common for all relays)
Relay Rated Voltage: 250V AC 16A, 24V DC 10A, 50V DC 1A
Relay Contact: 1c (three terminal terminals: a, b, and common)
Compatible Cable: AWG26-14
Number of Contacts: IWT303-1C 1 contact, IWT303-3C 3 contacts
Communication Interface: USB 1.1
HID Device Profile
USB Connector Type: Mini Type B
LED for ON/OFF indication for each channel
Power Supply: 5V USB bus powered
Power Consumption: IWT303-1C 85mA, IWT303-3C 250mA

Additional Requirements

A Mini B connector USB cable is required. Please refer to the related products below.

How to use

The terminal is printed with "a, c, b" on the board. When the relay is turned on, a-c is connected and c-b is disconnected. When the relay is turned off, a-c is disconnected and c-b is connected. When the power is turned on, it always starts from the OFF state (c-b is connected).

IWT303 is controlled by the TD-USB command. TD-USB is a command-line program that works on Windows/Linux.

Example) td-usb iwt303 set 3

set is a fixed string that updates the status of the relay. The setting value "3" becomes binary 011, updating CN1 and CN2 to ON and CN3 to OFF. If 2 is specified as the setting value, it becomes binary 010, so only CN2 is ON, and CN1 and CN3 are OFF.

If you want to control it from your own developed program, please use TD-USB as an external program. For details, please refer to the README of TD-USB.

Also, on Windows, you can control the relay from the screen using the demo application TD-AppKit.