24 points 24VDC digital input (2 points high speed 100KHz, 6 points medium speed 20KHz, 8 points
medium speed total 5KHz); 16 points relay or transistor output (2 points high speed 100KHz, 6 points
medium speed 20KHz); 1 RS232 or USB port(expandable up to 3); (MB is detachable terminal block)