6 points 24VDC digital input (2 points high speed 100KHz, 2 points medium speed 20KHz, 2 points medium
speed total 5KHz); 4 points relay or transistor output (2 points high speed 100KHz, 2 points medium speed
20KHz); 1 RS232 or USB port(expandable up to 3); I/O is not expandable