The 803-P2LH B series is a Condition Sensing DC Switch (Rotating Cam Limit Switch) developed by Allen-Bradley. The 803-P2LH helps end users and engineers to understand the proper functioning of sensing products. The 803-P2LH is placed in engineering systems that need to communicate some form of intelligence to the operators, especially where manual operation of the machinery is required. Where the motor operates automatically, the condition sensors provide signals that guide the activities taking place. The 803-P2LH helps reduce the machine operation costs by reducing machine downtime and the number of operators needed, as well as enhancing the safety of the machine and the operators. The 803-P2LH is a Rotating Cam Limit Switch module. It contains an internal timing, double-shaft arrangement, and heavy-duty double-break, and can attain speeds of up to 400 Rotations Per Minute (RPM). These specifications are found in most heavy-duty switches; the light duty switches come with a single shaft and have an external timing that makes it operable by specific individuals. The 803-P2LH communicates with the operators on various vital occurrences within the machine. They provide data on a number of variables including pressure and air compressors and are used in vacuum transfer machines when necessary. That implies that these switches are highly specialized and therefore, should only be used for the intended purpose. Additionally, only qualified personnel must be used to service the switches. These switches, even though they are rotation switches, provide the pressure needed to run the machine. The Rotating Cam Switch comes in many dimensions, depending on where it is used. The numbers of the circuits determine, to a small extent, the size of the switch. That implies that a switch with 2-circuits is smaller and lighter than one that has ten or more loops. Additionally, frontal dimensions vary concerning the number of circuits. Also, the circuit capacity and weight of the circuit is determined by the number of circuits. For example, the 803-P2LH with 3 circuits weighs 26 pounds, while the 12 circuit 803-P2LH weighs 52 pounds.

Carelessness when installing the 803-P2LH is likely to cause accidents that may harm the installer or lead to a technical hitch that prevents the piece from functioning. In some instances, the component may become damaged or damage the machine in which it is installed, causing a considerable loss. For this reason, the person installing this device should be qualified enough to understand the procedures. He must choose the number of rotations is necessary for the part to function optimally without posing a danger to the operators or other machines and machine parts in the vicinity. The installer must ensure that the part comes in the original packaging and is stored in a place whose temperature ranges from 4 to 40 degrees Celsius. Additionally, the 803-P2LH should be of the correct voltage and current; too low of a voltage and a current will interfere with the quality of the applications, while too high a voltage will damage electrical systems.