Snap-on expansion module for the Personal Daq/50 Series, provides 20 volts/TC inputs and 16 digital I/O • Multifunction data acquisition modules attach to PCs via Universal Serial Bus (USB 1.1 & 2.0 compatible) • Ultra low-power design requires no external power or batteries • Can be located up to 5 meters (16.4 feet) from the PC • High-resolution, 22-bit A/D converter offers reading rates from 1 to 80 Hz • Built-in cold-junction compensation for direct thermocouple measurements • Frequency/pulse, or duty-cycle measurements up to 1 MHz* • Convenient removable screwterminal signal connections • 500V optical isolation from PC for safe and noise-free measurements • Programmable inputs from ±31 mV to ±20V full scale • Digital I/O lines with open collector output for direct drive applications* • Expandable up to 80 channels of analog and digital I/O* • Up to 100 Personal Daq modules can be attached to one PC using USB hubs, for a total capacity of 8,000 channels • Digital calibration— no potentiometers or adjustments required