SDBT-MSX-1L-NU-E-2.5-N-LE - Detector Festo - Free user manual and instructions

Product Type	Magnetic Cylinder Sensor (T-slot)
Brand	Festo
Model	SDBT-MSX-1L-NU-E-2.5-N-LE
Category	Detector
Dimensions	Approx. 25 x 5 x 15 mm (L x W x H)
Weight	Approx. 20 g
Cable Length	2.5 m
Supply Voltage	10 - 30 V DC
Switching Output	NPN, normally open (NO)
Max. Switching Current	100 mA
Protection Class	IP67
Operating Temperature	-25 °C to +70 °C
Housing Material	PA (Polyamide)
Mounting Type	T-slot nut insert
LED Indicator	Yes (switching state)
Short-circuit Protection	Yes
Reverse Polarity Protection	Yes
Maintenance	No regular maintenance required; keep clean
Cleaning Instructions	Wipe with dry cloth; do not use solvents
Safety Notes	Disconnect power before installation; observe voltage limits
Spare Parts / Repairability	Not user-repairable; replace entire sensor
Certifications	CE, RoHS

Frequently Asked Questions - SDBT-MSX-1L-NU-E-2.5-N-LE Festo

What is the Festo SDBT-MSX-1L-NU-E-2.5-N-LE used for?

It is a magnetic cylinder sensor designed to detect the piston position in pneumatic cylinders with T-slots.

What is the supply voltage range?

The sensor operates on a DC supply voltage of 10 to 30 V.

How is the sensor mounted?

It is inserted into the T-slot of a cylinder and secured with a nut (included).

What does the LED indicate?

The built-in LED lights up when the sensor detects the magnetic field of the piston (switching state).

What is the protection rating?

The sensor has an IP67 rating, meaning it is dust-tight and protected against temporary immersion.

Can I use this sensor with any cylinder?

It is designed for cylinders with T-slots compatible with Festo sensors. Check your cylinder's slot dimensions.

What is the maximum switching current?

The maximum switching current is 100 mA.

How do I clean the sensor?

Clean with a dry cloth. Avoid solvents or abrasive cleaners.

Does the sensor have protection against short circuits?

Yes, it features short-circuit and reverse polarity protection.

What should I do if the sensor fails?

The sensor is not user-repairable. Replace it with an identical model.

USER MANUAL SDBT-MSX-1L-NU-E-2.5-N-LE Festo

Technical line drawing of a mechanical component with no visible text or symbols

FESTO
Festo SE & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
[phone]
www.festo.com
Instructions | Operating
8125856
2019-11a
[8125858]

Translation of the original instructions

© 2019 all rights reserved to Festo SE & Co. KG

1 Further applicable documents

i

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

2 Safety

2.1 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.

2.1.1 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 60947-1, UL 60947-5-2	C22.2 No. 60947-1, C22.2 No. 60947-5-2
UL mark	c US LISTED

Tab. 1

Only use power sources which guarantee reliable electrical isolation of the operating voltage in accordance with IEC/EN 60204-1. Observe also the general requirements for PELV power circuits in accordance with IEC/EN 60204-1. Only for connection to a NEC/CEC Class 2 supply. The device shall be supplied from an isolating transformer having a secondary listed fuse rated 1 A.

3 Product overview

3.1 Structure

1 Connecting cable
2 Open cable end (SDBT-MSX-...-LE)
3 Plug connector M8
(SDBT-MSX-...-M8)
4 Marking of sensing range
5 Green LED: display of sensing range; only in teach-in mode
6 Yellow LED: switching status display
7 Retaining screw
8 Capacitive operating key

Fig. 1

3.2 Function

The proximity sensor SDBT-MSX detects the magnetic field of the piston magnet. In the sensing range of the proximity switch, a switching point can be programmed. To set a switching point in the sensing range of the proximity sensor, there are two options:

• Auto teach-in
  – Capacitive operating key

1 Sensing range
2 Switching window

Fig. 2

3 Hysteresis

4 Teach-in point

4 Installation

4.1 Electrical

WARNING!

Risk of injury due to electric shock.

• For the electrical power supply, use only PELV circuits in accordance with IEC 60204-1/EN 60204-1 (Protective Extra-Low Voltage, PELV).
• Observe the general requirements of IEC 60204-1/EN60204-1 for PELV circuits.
• Only use voltage sources that ensure a reliable electric separation from the mains network in accordance with IEC 60204-1/EN 60204-1.

Circuit diagrams

- Mount the proximity sensor in the end position of the piston so that the end position is in the sensing range of the sensor. If available, the orientation aid provides the marking of the piston end position on the drive.

1 Marking of the piston end position on the drive (if available)
2 Retaining screw

Fig. 3

3 Marking of sensing range

4 T-slot

5 Commissioning

5.1 Automatic switching point setting: auto teach-in

Prerequisite: proximity sensor is in delivery status.

1. Mount the proximity sensor roughly in the end position→ 4.2 Mechanical.

2. Connect the proximity sensor→ 4.1 Electrical.

Proximity sensor is automatically taught in during operation, e. g. upon initial commissioning of the complete system.

Application notes on auto teach-in

During auto teach-in, each > 100 ms stop of the piston within the sensing range is output as a switching point. If the piston at this position reverses its direction of movement and leaves the sensing range without further stops, this switching point is saved temporarily.

If the piston stops 4x consecutively at the same position, reverses its direction of movement and leaves the sensing range without further stops, this position is saved as a final switching point. Auto teach-in is complete.

The process described corresponds with the classic use case: proximity sensor query at the end stop of the piston stroke or at the end stop of the customer application.

If the piston stroke is smaller than the sensing range of the SDBT-MSX, ensure that the second reversal point of the piston is outside the sensing range during auto teach-in → Tab. 3.

Application notes on auto teach-in

Auto teach-in possible:End position A	Auto teach-in possible:End position B	Auto teach-in not possible. The switching point must be set using the capacitive operating key.

Tab. 3

5.2 Manual operation using capacitive operating key

i

The proximity sensor is parameterised once it is installed.

• Be mindful of the surface temperature of the capacitive operating key and of the drive.
• Avoid contamination and moisture on the proximity sensor.

5.2.1 Setting the switching point

1. Move the piston into the sensing range of the proximity sensor.
2. Actuate the capacitive operating key 3 times to activate set-up mode.
3. Actuate the capacitive operating key once to switch to the menu item "Set switching point".
4. Actuate the capacitive operating key once.

The current piston position is taught in as the switching point.

5.2.2 Setting the switching point with variable switching window width

1. Move the piston into the sensing range of the proximity sensor.
2. Actuate the capacitive operating key 3 times to activate set-up mode.
3. Actuate the capacitive operating key twice to switch to the menu item "Set switching point with variable switching window width".
4. Actuate the capacitive operating key once.

The current piston position is taught in as a switching point with approx. 2 mm switching window width.

Every other keystroke increases the switching window width by approx.

1 mm. A max. switching window width of 15 mm is possible.

5.2.3 PNP/NPN switch-over

1. Actuate the capacitive operating key 3 times to activate set-up mode.
2. Actuate the capacitive operating key 3 times to switch to the menu item "Switch over between PNP / NPN".
3. Actuate the capacitive operating key once to switch between PNP->NPN or NPN->PNP.

5.2.4 NO/NC switch-over

1. Actuate the capacitive operating key 3 times to activate set-up mode.
2. Actuate the capacitive operating key 4 times to switch to the menu item "Switch over between NO / NC".
3. Actuate the capacitive operating key once to switch between NO->NC or NC->NO.

5.3 Menu structure

graph TD
    A["Display with factory settings [NO"]
    Both LEDs off: Outside the sensing range; no switching point
    Green LED off & yellow LED on: cylinder switch operation: switching point finally programmed as a teach-in value
    Green LED on & yellow LED off: piston magnet in sensing range; no switching point
    Both LEDs on: Piston magnet in sensing range; switching point] --> B["Set up mode"]
    B --> C["Set switching point"]
    C --> D["1 x"]
    D --> E["Flashes yellow once, then 2 s pause"]
    D --> F["Green ON: teach-in possible¹"]
    E --> G["Switching point set Width of switching window 2 mm"]
    F --> H["Set switching point with variable width of switching window"]
    H --> I["2 x"]
    I --> J["Flashes yellow 2 times, then 2 s pause"]
    I --> K["Green ON: teach-in possible¹"]
    J --> L["N x"]
    K --> M["N=14: 15 mm (max. width of switching window)"]
    L --> N["Switching point set & width of switching window + 1 mm:<br>N=1: 2 mm<br>N=2: 3 mm<br>..."]
    M --> O["..."]
    N --> P["Switch: PNP ↔ NPN"]
    O --> Q["Switch: PNP → NPN or: NPN → PNP"]
    Q --> R["3 x"]
    R --> S["Switch: NO ↔ NC"]
    S --> T["4 x"]
    T --> U["Switch: NO → NC or: NC → NO"]
    U --> V["5 x"]
    V --> W["Display: PNP / NPN"]
    W --> X["6 x"]
    X --> Y["Flashes yellow 5 times, then 2 s pause"]
    X --> Z["Current status: Green ON: PNP<br>green OFF: NPN"]
    Y --> AA["10 x"]
    AA --> AB["Reset to factory settings"]
    AB --> AC["Yellow + green flash simultaneously at 2.5 Hz"]
    AC --> AD["No switching point set PNP (SDBT-...-PU)<br>NPN (SDBT-...-NU)<br>NO"]
    AD --> AE["t > 60 s"]
    AE --> AF["Error"]
    AF --> AG["Green flashes at 3 Hz for 1 s"]
    AG --> AH["Termination"]
    AH --> AI["Yellow lights up for 0.5 s"]
    AI --> AJ["3 s"]

N x = press capacitive operating key (e.g.: 3 x);
Max. 1 second pause between two consecutive presses. After a 1 second pause, entry is copied.
3 s = hold the capacitive operating key pressed for at least 3 seconds
= LED ON / LED flashes / LED OFF (e.g.: yellow LED)

1) A switching point can only be set when the green LED is ON.

When the green LED is flashing at 1.5Hz, the magnet is located in the region of the function reserve. It is not possible to set a switching point. The function reserve is required for the safe setting of switching points in the edge region. When the green LED is OFF, the magnet is outside the sensing range. It is not possible to set a switching point.

Fig. 4

6 Reset to factory settings.

Parameter Factory setting
Operating mode Auto teach-in
Switching output No switching point programmed	Configuration of the switching output:– SDBT- ... -PU: PNP– SDBT- ... -NU: NPNSwitching element function: NO
Variable switching window width Not programmed

Tab. 4

1. Actuate the capacitive operating key 3 times to activate set-up mode.
2. Actuate the capacitive operating key 10 times to switch to the menu item "Reset to factory settings".
3. Actuate the capacitive operating key once.

→ Proximity switch is reset to factory settings.

7 Malfunctions

7.1 Diagnostics via LEDs

Display Meaning Measure
off	Status indication:– Piston outside the sensing range– Piston not at switching point	Normal operating caseBoth LEDs
	Error:– Power supply fault– Connecting cable or sensor defective	– Check power supply– Check connecting cable– Replace device
Green LED flashes at 6 Hz	Hardware error – Disconnect and connect proximity sensor– Replace device

Tab. 5

7.2 General malfunctions

Error description Possible cause Measures/remedy
Incorrect or unexpected signals at the output	Proximity sensor defective – Replace proximity sensor
	Operating voltage not connected or outside the operating voltage range	– Comply with operating voltage range
	Short circuit or overload at the output	– Rectify short circuit/over-load
	Magnetic or ferromagnetic objects close to the proximity sensor	– Keep magnetic or ferromagnetic objects clear of the proximity sensor– Conditions during teach-in of the switching point must correspond to operating conditions (e.g. no screwdriver in the locking screw)
	Orientation of the proximity sensor rotated 180° in the slot after adjustment of the switching point	– Reset switching point (with auto teach-in or operating key)
react in accordance with the settings	Proximity sensor defective – Replace proximity sensorSwitching output does not
	Short circuit or overload at the output	– Rectify short circuit/over-load
Capacitive operating key does not react to input	Dirt or moisture on the proximity sensor	– Wipe proximity sensor with a dry cloth

Tab. 6

8 Technical data

SDBT-MSX
Operating voltage range [V DC] 10 ... 30
Max. output current [mA] 100
Operating temperature range [°C]−40 ... +85 (UL: +80)
Ambient temperature with [°C]−20 ... +85 (UL: +80)flexible cable installation
Degree of protection(EN 60529)	IP 65 / IP 68

Tab. 7