SME-8M-DS-24V-K-2 5-OE - Sensor Festo - Free user manual and instructions

Product Type	Magnetic Proximity Sensor
Brand	Festo
Model	SME-8M-DS-24V-K-2.5-OE
Category	Sensor
Operating Voltage	24 V DC (±10%)
Output Type	Digital (PNP/NPN, depending on variant)
Sensing Range	Up to 5 mm (depending on magnet strength)
Switching Frequency	Up to 1 kHz
Electrical Connection	Cable with open ends
Cable Length	2.5 m
Protection Class	IP67
Operating Temperature	-30 °C to +80 °C
Housing Material	Polyamide (PA)
Dimensions (L x W x H)	27 mm x 8 mm x 8 mm
Weight	Approx. 30 g
LED Indicator	Green (power), Yellow (output)
Short-Circuit Protection	Yes
Reverse Polarity Protection	Yes
Mounting Type	T-slot (for pneumatic cylinders)
Recommended Accessories	Mounting kit, cable extension
Maintenance	Check cable integrity and cleaning with mild detergent
Cleaning	Wipe with a soft, dry cloth; avoid solvents
Safety Warnings	Do not exceed voltage range; disconnect power before installation
Spare Parts	None (non-serviceable assembly)
Repairability	Not repairable; replace unit if faulty

Frequently Asked Questions - SME-8M-DS-24V-K-2 5-OE Festo

How do I install the SME-8M-DS-24V-K-2.5-OE sensor?

Insert the sensor into the T-slot of the cylinder until it snaps into place. Ensure the desired switching point is aligned with the piston magnet.

What is the maximum cable length I can use?

The total cable length should not exceed 30 m to avoid voltage drops. For longer distances, use a suitable amplifier.

Can I use this sensor with any Festo cylinder?

This sensor is designed for cylinders with T-slots and a magnetic piston. Compatible with most Festo cylinders, e.g., DSNU, ADN, etc.

How do I connect the sensor to a PLC?

The sensor has three wires: brown (24V DC), blue (0V), and black (output). Connect these to the corresponding PLC inputs.

What does the LED indicator mean?

A green LED indicates power is on. A yellow LED lights when the sensor detects the magnet (output active).

Why is my sensor not switching?

Check that the magnet is present in the cylinder, the sensor is properly aligned, and the power supply is within the specified range.

Is the sensor protected against short circuits?

Yes, the sensor has built-in short-circuit and reverse polarity protection.

Can I cut the cable?

It is not recommended. If necessary, cut the cable and properly insulate the ends. Use a suitable connector or splice.

What is the switching frequency?

The maximum switching frequency is 1 kHz, suitable for high-speed applications.

Where can I find the technical datasheet?

The datasheet is available on Festo's official website or by scanning the QR code on the product packaging.

USER MANUAL SME-8M-DS-24V-K-2 5-OE Festo

Technical line drawing of a mechanical tool or bracket with a cylindrical shaft and mounting hole (no text or symbols)

FESTO

Festo SE & Co. KG

Ruiter Straße 82

73734 Esslingen

Germany

[phone]

www.festo.com

Instructions | Operating

8112707

2019-05

[8112709]

Translation of the original instructions

1 About this document

1.1 Further applicable documents

1

All available documents for the product → www.festo.com/pk.

1.2 Safety

- Before working on the electrics: switch off the voltage supply.

WARNING!

Risk of injury due to electric shock.

• For the electric power supply, use only PELV circuits that ensure a reliable electric disconnection from the mains network.
• Observe IEC 60204-1/EN 60204-1.

1.3 Intended use

This product is intended for sensing the position of magnets (e. g. the piston position) in Festo products. The device is intended for use in an industrial environment.

1.3.1 Area of application and approval

In combination with the UL inspection mark on the product, the information in this section must also be observed in order to comply with the certification conditions of Underwriters Laboratories Inc. (UL) for USA and Canada.

UL approval information
Product category code NRKH, NRKH7
File number E232949
Considered standards UL 60947-5-2	CAN/CSA C22.2 No. 60947-5-2
UL mark	C US LISTEDIndustrial Control Equipment2MD1

Tab. 1

2 Electrical connection

SME-8M-DS-24V-...

M8/M8D M12 OE
41+3	3+4+1

Tab. 2

SME-8M-DO-24V----
M8/M8D M12 OE
41+3	23+1

Tab. 3

SME-8M-ZS-24V-...-
M8/M8D M12 OE
41+ +	4

Tab. 4

3 Mechanical installation

Fig. 1

4 Technical data

4.1 Technical data UL

SME-8M-...-24V-...
Operating voltage range [V DC] 5 ... 30
Ambient temperature [ ^ ] -20 ... +70

Tab. 5

4.2 Technical data, general

SME-8M-...-24V-...

Operating voltage range [V AC/DC] 5 ... 30
Max. output current [mA] 500
Max. output current in mounting kit [mA] 80
Max. switching capacity [W]	10
Max. switching capacity in mounting kit [W]	2.4
Ambient temperature [°C] -40 ... +70
Ambient temperature with flexible cable installation [°C] -5 ... +70
Degree of protection	IP65, IP68

Tab. 6