Host computer communicates with Model MCB-4B via RS232/485 ports. Integrated motor controller/ driver board, with full-, half-, and mini-step capability, handles up to 4 dual-phase stepping motors, 3 A/phase, with rates to 50,000 steps/sec; 16.7 million steps/move. Features include programmable accel/decel and 4 toggle switches for manual jog control. Motor voltage is 12-45 Vdc, to 16 A.