D4-450DC-1 CPU, 30.8K words total memory. 7.5K flash ladder memory on board or use optional memory cartridge for up to 15.5K ladder (RAM, UVPROM, or EEPROM cartcartridges available). RLL/RLLPLUS programming, with support for up to 16 PID loops and floating point math. Built-in comm ports including an RS232C programming port and auxiliary RS232C/RS422 ports, internal 24 VDC power supply (memory cartridge is optional).

Manufacturer Part Number: D4-450DC-1