Magnet Switch DSM3D Textile Parts

The DSM3D (often associated with the prefix mPm, a brand under the Molex umbrella, or referenced alongside standard tie-rod cylinder sensors like the SM3D2-G) is a heavy-duty magnetic reed switch sensor. It is widely used in industrial automation to detect the position of a piston inside a pneumatic or hydraulic cylinder.

Instead of mounting in a small profile slot, this sensor is traditionally engineered for larger, heavy-duty tie-rod cylinders or specialized valve assemblies.

Key Technical Specifications

• Manufacturer/Brand: mPm (Molex) / Universal Industrial OEM

• Sensor Type: Magnetic Reed Switch (Mechanical Contact)

• Operating Voltage: Typically 24V AC/DC (Standard control circuit voltage, though some reed variants can handle up to 110V/230V depending on the exact series layout).

• Current Rating: 1A maximum switching current. This is a robust capacity compared to modern solid-state sensors, allowing it to drive small relays or indicator lamps directly without burning out the internal contacts immediately.

• Indicator: Usually features a built-in LED indicator to display the switching status (On/Off) visually during system operation and troubleshooting.

• Wiring: Standard multi-wire cable configuration.

Common Applications

• Pneumatic & Hydraulic Cylinders: It mounts externally onto a cylinder body (frequently using a tie-rod clamp or bracket). When the internal magnetic piston passes underneath the sensor, the magnetic field closes the reed contact, sending a position signal back to the PLC.

• Heavy Machinery & Printing Equipment: Due to its robust construction and high current capacity, it is often found as an OEM component in legacy European machinery, material handling setups, and specialized pressroom automation.