Single-position limit switch PEM2G25X A37-B91X

Application and Operating Principle in Harsh Conditions

The PEM2G25X series limit switch is a device designed for precise detection of mechanical component positions in industrial automation. Its key feature is the use of a perpendicular roller actuator, enabling reliable detection of objects even during lateral or angled movement. Thanks to the high housing durability (protection rating IP67) and construction from metal with powder-coated finish, the device operates flawlessly in environments rich in dust, moisture, or direct water splashes.

Special attention should be paid to the contact configuration: this model features 1 normally open (NO) contact and 1 normally closed (NC) contact. This universal solution allows simultaneous control of "start" and "safety" signals within a single operating cycle. The positive separation (snap-action) switching function ensures immediate response upon exceeding the threshold, which is critical for high-speed machine movements. Additionally, the use of forced opening guarantees safe and rapid circuit disconnection even in case of actuator jamming – a standard requirement in many safety applications, although the product itself is not certified as a dedicated safety system component (SIL/PL).

Benefits for Installation and Mounting

For installers, the most important factors are ease of integration and connection durability. This model stands out with its cable connection, eliminating the need for additional sockets or connectors when mounting in hard-to-reach locations. The cable ensures a sealed connection immediately after installation, accelerating assembly work.

• Universal dimensions: The housing, with a width of 35 mm and height of 16 mm, fits into standard control cabinets and on machine arms without requiring large mounting holes.
• Wide temperature range: The device maintains full functionality from -25 °C to +70 °C, making it suitable for both heated production halls and outdoor applications or cold storage facilities.
• Current capacity: Despite its compact design, the switch handles currents up to 3 A at 125 V AC and 1.5 A at 230 V AC. In DC circuits (e.g., contactor control), the current ratings are 0.22 A at 125 V and 1.1 A at 24 V, respectively.

The device's current capabilities vary with the rated voltage: at 24 V DC, a current up to 1.1 A can be utilized, while at 125 V, the maximum current for AC-15 loads is 3 A, dropping to 0.22 A for DC-13 loads. At the higher voltage of 230 V, the device handles up to 1.5 A in AC-15 circuits and up to 0.1 A in DC-13 circuits. These parameters allow flexible adaptation of the switch to various load types within control systems.

Construction and Mechanical Durability

The powder-coated metal housing not only protects the interior against corrosion but also provides resistance to mechanical impacts typical in industrial environments. The plastic roller on the actuator minimizes friction during contact with the detected object, reducing wear on both the switch itself and the mechanism controlling it. The total length of the device is approximately 84.8 mm, enabling installation even with limited working space in front of the sensor.

The absence of a built-in visual status indicator means that the operating state must be monitored via external signal devices or by measuring voltage across the contacts – a typical solution for devices mounted inside cabinets or hidden behind machine guards, where visual inspection is unnecessary during normal operation. Due to the lack of an electronic interface (purely mechanical operation), the device exhibits high reliability and no risk of failure caused by electromagnetic interference (EMI).