Isolated Digital Input Board 8 Channels Current Source/Sink USB Bus-powered

Tokyo Devices
Model Number:
Released at:
Aug 2020

Tool and Controllers     Relay and Digital I/O    

TDFA30608 is an 8 channel USB digital IO input board. You can easily read signals from various external devices from your own programs. Because it is electrically insulated, it has excellent safety and noise resistance.


Use Cases

The input equivalent circuit is as shown in Image 2. Connect the power to the common terminal and connect buttons or external devices to each terminal.

Next, connect the module to a PC. By executing the following command from the command line, you can read the status of the contact points:

% td-usb tdfa30608 get

td-usb is the command name, tdfa30608 is a fixed string to identify the product, and get is a fixed string to instruct reading the state. Upon successful execution, a numerical value is returned to the standard output. The binary representation of this number indicates the logical state of each port. In the example given, the decimal number 3 is returned. In binary, 3 is 00000011, indicating that ports 0-1 are positive (or 'on'), and ports 2-7 are negative (or 'off').

For detailed usage instructions, please refer to the provided manual and command description.

Additional Requirements

Documents and software

How to Buy

For customers in the United States, some products may be available for purchase on Please search by the product model number TDFA30608.

If you can't find the product or if you are from another country, please contact us using the inquiry form.

Qty. Unit Price
1 5,180 JPY
10 4,980 JPY
100 4,680 JPY