Honeywell 42203758-03SE Straight RS-232 TTL Cable, D9 Female Pin, 3800, QC980, 55/30

the unist quantum communicates to machine tools using the rs-232 serial communication protocol the term serial means data is sent one bit at a time sending more than one bit at a time is called parallel rs-232 is a specific serial protocol that defines the wiring and flow control used to send these data fits it was originally designed to send data between computers using modems and a telephone line and you will see this legacy as we learn more about the protocol let's begin by looking at the wiring we start with two pieces of equipment that need to communicate with each other to keep it simple let's say one only sends and the other only receives in reality both sides send and receive but if you understand how the communication works in one direction you can apply it to both data is generated by the sender which puts it in a send buffer the temporarily holds the data to get the data from