Festo SME-8M-DS-24V-K-2,5-OE 543862 Magnetic Reed Proximity Sensor T‑Slot

Festo SME-8M-DS-24V-K-2,5‑OE (543862) is a magnetic reed proximity sensor designed for position detection in pneumatic cylinders with T‑slots. It complies with EN 60947‑5‑2 and carries c UL us (OL) and RCM approvals. The sensor is inserted from above into the cylinder slot, sits flush with the profile and requires no additional mounting brackets. The yellow LED provides clear switching status indication and the 2.5 m open‑end cable supports flexible wiring.

Applications:

• End‑position detection for pneumatic cylinders (e.g., DSNU, DNC series)

• Gripper position monitoring in pick‑and‑place

• Factory automation and packaging machinery

• Conveyor systems and material handling – suitable for energy chains and robotic applications

Core Specifications:

• Measuring principle: Magnetic reed

• Switching element function: N/O contact (Normally Open)

• Switching output: Contact‑based, bipolar (NPN or PNP suitable)

• Max. output current: 500 mA (80 mA when used with mounting kits)

• Max. switching capacity DC: 10 W / AC: 10 VA

• Operating voltage range: 5 … 30 V DC/AC

• Electrical connection: 2.5 m PUR cable, open end

• Degree of protection: IP65 / IP68

• Ambient temperature: -40 °C … +70 °C (fixed installation)

• Housing material: PA, high‑alloy stainless steel

• Switching status indicator: Yellow LED

• Designed for T‑slot, assembly from above, flush with cylinder profile

• Oil resistant, free of copper and PTFE, RoHS compliant

Advanced Specifications:

• Reverse polarity protection: Not available

• Short‑circuit protection: Not available

• Voltage drop: < 1.5 V

• Energy chain suitability: Tested for > 5 million cycles at 75 mm bending radius

• LABS (PWIS) conformity: VDMA24364‑B2‑L

• Corrosion resistance class (CRC): 2 – moderate corrosion stress

• Product weight: 29.8 g

• Manufacturer part number (also known as): 543862

System Integration:

• Insert from above into the T‑slot of any compatible pneumatic cylinder (e.g., Festo DSNU, DNC, ADN series) and secure with a screw or clamp.

• The 2.5 m open‑end cable (3 wires) can be connected directly to a PLC input or a junction box.

• The N/O contact (NO) is activated when the piston magnet reaches the sensing range.

• Detailed electrical and mechanical design data are available in Festo’s official data sheet (81 kB / 2 pages).

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information (c UL us Listed, RCM, UKCA, CE, RoHS).

Related Products:

• SME‑8M‑DS‑24V‑K‑0,3‑M8D (543861) – same sensor, 0.3 m cable with M8 connector

• SME‑8M‑DS‑24V‑K‑5,0‑OE – 5 m cable, open end

• SME‑8‑S‑LED‑24 (150857) – reed sensor for T‑slot, standard LED indicator

• SMT‑8M‑PS‑24V‑K‑2,5‑OE – magnetoresistive sensor (electronic, no‑wear)