Built-in I/O: 10 / 14 / 16 / 20 / 24 / 30 / 32 / 40 / 48 / 60 Program capacity: 4 k steps COM port: Built-in RS-232 & RS-485 ports (10 / 14-point models do not support RS-485), compatible with Modbus ASCII / RTU protocol Supports 2 points (Y0, Y1) of independent high-speed (max. 10 kHz) pulse output (Hardware version V8.00 and above support this function