PLC CONTROLLER (PROGRAMMABLE LOGIC CONTROLLER)
PLCs can range from small modular devices with tens of inputs and outputs (I/O), in a housing integral with the processor, to large rack-mounted modular devices with a count of thousands of I/O, and which are often networked to other PLC and SCADA systems.
1756-DHRIO CONTROLLOGIX DATA HIGHWAY PLUS DH+ COMMUNICATION MODULE
ControlLogix systems allows drives, process, discrete, motion, and safety control along with communication and most advanced I/O in a low cost, small combination. Controllogix is modular, so you can create, build, and change savings costs with engineering and training.