DVP20EX200R: 20-point host, 8DI / 6DO (relay), 4AI / 2AO (12bit / 12bit), 2 100K inputs, 2 20K inputs, three serial ports, AC power .DVP20EX200T: 20-point host, 8DI / 6DO (NPN / 24Vdc / 0.5A), 4AI / 2AO (12bit / 12bit), 2 100K inputs / outputs, 2 20K inputs / outputs, three serial ports, AC power.