Koyo Automation Direct D2-250
D2-250 CPU, 14.8k words total ( 7680 words ladder - flash memory, 7168 words V-memory) , RLL/ RLLPLUS programming, two built-in RS-232C ports. Bottom port also supports Remote I/ O Master, RS-422, DirectNET Master/ Slave, Modbus RTU Master/ Slave. Advanced instruction set includes up to 4 PID loops.