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Programmable logic controllers (PLCs) are widely used in agricultural production and processing. Thus, agricultural systems management students should receive hands-on experience with these devices as part of their undergraduate education. However, in many cases, the cost of providing class-quantity PLCs for student laboratory use is prohibitive. This article describes a lowcost PLC trainer developed for use in a university-level agricultural electricity course. A sample laboratory activity used with the PLC trainer is also described.