Interworld Electronics has released two new USB-104 form factor Digital I/O modules from Acces I/O. The USB-DIO-48 and the USB-DIO-96 provide 48 lines or 96 lines of TTL compatible buffered digital I/O with high current capabilities. The modules are USB 2.0 high-speed devices and are compatible with both USB 1.1 and USB 2.0 computer ports.
Their plug-and-play ability allows you to quickly connect and disconnect whenever you need additional I/O.The modules provide either six or twelve 8-bit digital I/O ports. Each 8-bit port can be programmed to accept inputs or to drive outputs such as PLC's or relays. Power is supplied to the cards via the USB cable, or for higher source current capabilities, an external power option may be used. The I/O wiring connections are via two or four industry standard 50-pin connectors. For external circuits, fused +5VDC power is available at pin 49 of each I/O connector.
All I/O lines are capable of sourcing 32 mA or sinking 64 mA. Jumper selected resistors permit configuration of each 24-bit / 50-pin connector group for pull-up (to +5 VDC), pull-down (to ground) or floating depending on the application requirement. Pull-ups are useful for contact monitoring and assure that there are no erroneous outputs at power-up until the card is initialized by system software.
Unlike most USB digital I/O products which primarily use a human interface device (HID) driver, Access I/O provide an easy to use custom function driver capable of updating all 48/96-bits approximately 4000 times per second.
The USB-DIO-48 and the USB-DIO-96 are supplied in a rugged industrial case. An OEM (board only) option is also available. What makes the OEM option unique is that its PCB size and pre-drilled mounting holes match the PC/104 form factor. This allows the modules to be added to any PC/104, PCI-104, or PCI/104-Express stack making them perfect for a variety of embedded applications.