Measurement Computing's USB-4304 is a USB-based high-performance, low-cost counter/timer device with two 37-pin "D" connectors.
The USB-4304 is designed with two 9513 counter/timer chips. Each chip has five independent 16-bit counters (65,536 counts). Each counter has an input source, internal count register, load register, hold register, output, and gate.
The 9513 is software-programmable for event counting, pulse and frequency measurement, alarm comparisons, and other input functions. The 9513 can generate frequencies with either complex duty cycles, or with one-shot and continuous-output modes. Up to five 9513 counters can be chained together using software to enable a 32-, 48-, 64-, or 80-bit counter that does not require hardware connections. The gate source and gating functions are software-programmable.
An eight-bit, high-current digital output port provides logic-level control, and can be used to switch solid state relays. An eight-bit digital input port can be used to sense contact closures and other TTL level signals.
"With reliability a key concern, we chose a name we could trust and the USB unit was a low-cost item that has proved very effective." Gordon Roxburgh, Volunteer Engineer, Brooklands Museum
"USB output has really made life easier on insutrumentation projects because you can simply swap from one laptop to another with minimal fuss. On this sort of operation that gives us extra confidence." Stephen Kemp, Manager, GBG Structural Services
