Allen Bradley 1769-L31 CompactLogix controller
The Allen-Bradley 1769-L31 is a Programmable Automation Controller (PAC) that is part of the 1769 CompactLogix controller family. This controller is ideal for use in small to medium scale applications. This controller is provided with dual RS232 communication interfaces, specifically channel 0 that supports DF1, DH-485 and ASCII protocols and channel 1 that supports DF1 and DH-485 protocols. Channel 0 is a fully isolated port while Channel 1 is a non-isolated port, both supporting up to 38.4 kbps transmission speed.