● Channels / Groups: 24 in two 8-bit and two 4-bit groups

● Type: 8255 Mode 0 compatible

● Logic Level: VCCIO

● Pull-up/down: 10kΩ, jumper selectable

● Number / Type: Two 82C54 programmable interval counters

● Counter Size: 16-bit

● Logic Level: VCCIO

● On-Board Clock: 10MHz

● Clock Pulse Width: High – 30ns (min) Low – 40ns (min)

● USB 2.0 High-Speed

● USB 3.0 Compatible

● USB 1.1 Full-Speed compatible

● Operating Temperature 0° to +70°C, optional -40° to +85°C

● Storage Temperature -40° to +85°C

● Humidity 5% to 95% , non-condensing

● Board Dimension: 3.550 x 3.775 inches

● Box Dimension: 4.00 x 4.00 x 1.25 inches

● Basic Unit: 140mA typical (no load)

● Auxiliary Outputs: +5VDC via 0.5A resettable fuse (500mA trip current)

● Bus Powered: +5VDC provided via USB bus up to 500mA

● Externally Powered: Optional on-board external power circuitry and AC/DC (regulated 5V output) adapter can be ordered (“-PR” option) if source current use is expected to be greater than what can be supplied by the USB bus (typically 500mA).

The USB bus is specified to provide 500mA through the USB cable to most desktop environments. This gives you 360mA available on 5VDC (500mA – 140mA = 360mA) for source/sink current output and external power connector (pin 49) for any particular application. If using more than a total of 500mA, or your USB port/hub has less then the 500mA normally provided, use optional 5VDC external power supply (-PR option) and remove VUSB jumper and place jumper on VEXT. Then plug in external power before plugging into USB port.

This product is designed to be in full compliance with CE requirements.