AVG Automation's M1750 Programmable Limit Switch, with its modular construction and simple operator-machine interface, represents the easiest solid-state replacement of rotary cam switches or drum sequencers. We call it PLS unlimited, because it can do things no common electromechanical sequencer or mechanically operated cam switch can do. When compared to mechanical switches, the M1750's superior accuracy, reliability, and convenience of operation are outstanding. Such technology assures the AVG Automation customer a greater efficiency in manufacturing, helping him to increase production and lower costs.

Principal of Operation 
The M1750 PLS gets the shaft position data from a rotary transducer, which could be either an absolute digital encoder or a resolver. The output of a digital encoder is binary-coded­decimal (BCD), while the analog output of a resolver is converted to BCD by an R-to-D converter inside the PLS. The data received is processed in the buffer circuit, displayed in degrees (0-359) or counts (0-999) and compared to the programmed dwell-angle setpoints. When the process cycle reaches these setpoints, outputs are switched ON or OFF, starting or stopping desired functions.