Rockwell Automation AB -
SLC 500 Programmable Logic Controller
The SLC 500 family is a growing family of small programmable controllers built around two hardware options: a fixed controller or a modular controller. The modular controller offers you maximum flexibility in system configuration. Wth its multiple processor choices, numerous power supply options and extensive I/O capacity, the modular SLC 500 controller allows you to create a system specifically designed for your application.
The fixed controller provides the power supply, inputs and outputs, and processor in one unit. It also offers a 2-slot expansion chassis for increased flexibility. The programming tools and most I/O modules are compatible between the two hardware options, so you can cost effectively solve a broad range of applications.
PLC-5 / 1771 Controller System
PLC-5 processors are available in a large range of forcible I/O (512 maximum through 3072 maximum) and maximum user memory (6K through 100K words). All are capable of controlling remotely-located I/O. The maximum number of I/O locations ranges from 5 through 125.
A PLC-5 processor communicates across the 1771 backplane to 1771 I/O modules in the chassis in which the processor resides. A PLC-5 processor can communicate with I/O across a DeviceNet or Universal Remote I/O link. Selected models of PLC-5 processors can communicate with I/O across a ControlNet or Extended Local I/O link. I/O adapters for 1771 I/O are available for ControlNet, Universal Remote I/O, and Extended Local I/O links. General communication messages can be sent from or received by PLC-5 processors across DeviceNet, ControlNet, or Ethernet networks, as well as Data Highway Plus, RS-232-C, RS-422-A, or RS-423-A networks. You can add a DeviceNet port to any PLC-5 processor with a 1771-SDN scanner module. Each Ethernet PLC-5 processor has an on-board Ethernet port, and you can add an Ethernet port to any PLC-5 processor with a 1785-ENET Ethernet Interface Module.