PLC-5 Series PLC has been gradually withdrawing from the market, is replaced by the present ControlLogix family. PLC-5 in 1986, launched its high-reliability has been widely used. Now mostly the form of spare parts for the old control system.  PLC-5 controller in the control system of a central location, through the EtherNet / IP, ControlNet (Control Networks), DeviceNet (DeviceNet) existing and future systems integrated together, and provides the SLC 500, ControlLogix, connectivity between MicroLogix processor. Because the PLC-5 processor, built-in network connectivity, PLC-5 makes the control structure is flexible enough to go in a very wide range of devices to establish economic connections.  A minimum configuration PLC-5/1771 control system includes a programmable controller module and some mounted on a rack on the input and output modules, power supply module.