Isolated Digital Input Board 8 Channels 5/12/24V Input Current Source/Sink USB Bus-powered

Features

• Compatible with various voltage systems including 5V, 12V, and 24V.
• The input section is isolated, providing excellent safety and noise resistance.
• Recognized as a generic USB HID device, eliminating the need for special drivers.
• Supports both Windows and Linux operating systems.
• Operates on bus power, so no external power source is needed (although some models require an external power source for the common terminal).
• Each channel has an LED, allowing immediate visibility of the signal status.
• Multiple modules can be connected to a single PC, enabling the reading of a large number of channels.
• Compatible with single-board computers like Raspberry Pi.
• An optional enclosure (TDCS023) is available.

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
3

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

• An external power source (5-24V) is required for the common terminal for external devices.
• A separate USB cable (USB Type-A to Mini-B) is necessary. Please refer to the related products mentioned below.