NX7
• Basic control to 28, 48 points and up to 104 digital I/O points or Basic 20p DI/O
   and 4/6Ch Analog I/O points Unit
• Supports 2 expansion unit
• 2 serial ports (2 RS232C/RS485 with Modbus RTU)
• Program memory size up 9K words
• Built-in HSC, Pulse catch, Pulse output (for TR output unit)
• Built-in real-time clock, PID function