The Allen-Bradley 1747-SN Remote I/O Scanner Module provides the essential interface for Remote I/O communication in SLC 500 control systems. As a chassis-mounted module, it sits in an SLC 500 PLC rack to connect a central controller with remote I/O racks over the Remote I/O (RIO) network for distributed control. Key specifications include selectable baud rates of 57.6K, 115.2K, and 230.4K bps, and compatibility with Allen-Bradley SLC 500 PLC systems. Common replacements for expanding or maintaining the network include the 1747-ASB Remote I/O Adapter, the 1747-SDN DeviceNet Scanner Module, and the 1747-SCNR ControlNet Scanner Module.
