11SM3-S

The 11SM3-S limit switch by Allen-Bradley is a miniature snap-action type of switch commonly found in industrial systems. It is used to detect the occurrence of an event such as a limit point of travel or a change in speed or direction. This type of switch typically consists of a moving part and a stationary part, each of which is connected to a contact that closes when the switch is operated.

The 11SM3-S limit switch uses a powerful spring for its mechanical action, meaning that its operation does not require high force. This reduction in force is desirable for its applications, as it helps to prevent over-travel. The force used to trigger the switch is adjustable, and a variety of models exist for different switch weights required for applications.

The 11SM3-S limit switch works by way of a biased lever arm. When the switch is in the "off" position, the arm is held in place by the bias spring. When the switch is moved or pressed, it moves the lever arm, thus releasing the tension on the spring and allowing the switch to close. Depending on the type of switch, the lever may be movable or fixed.

The 11SM3-S limit switch is typically found in applications where an external force must be applied to trigger the switch. This could include applications such as elevator doors, conveyor systems, hinges, and vending machines. This type of switch is also capable of withstanding extreme temperature and vibration, making it suitable for harsh environments.

In addition to its robustness, the 11SM3-S limit switch is rated for up to 600 volts and can operate up to a million cycles. It is designed to meet NEMA requirements, and is RoHS compliant, ATEX and CSA certified. It is also equipped with a 1/4-20 threaded mounting bracket and can be easily mounted and wired.

The 11SM3-S limit switch is available in two models—a plunger type and a roller plunger. The plunger type is designed for use in enclosed areas where the switch lever is mounted on a stationary plate and pressed by the plunger. The roller plunger is suitable for applications that require the switch lever to be moved in both directions.

The 11SM3-S limit switch is a reliable and economical solution to a wide range of applications where reliable switch action is required. With its adjustable force, robustness, and ease of installation, the 11SM3-S is an ideal choice for industrial automation applications.