PM866K01 [caption id="attachment_2135" align="aligncenter" width="600"] PM866K01PM866K01 [/caption] The CPU board contains the microprocessor and RAM memory, real-time clock, LED indicator, INIT button, and CompactFlash interface. The PM866 / PM866A controller base plate has two RJ45 Ethernet ports (CN1, CN2) and two RJ45 serial ports (COM3, COM4) for connecting to the control network. One of the serial