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Side 1/2

SMAT-8M

Position transmitter

Festo SE & Co. KG

Ruiter Straße 82

73734 Esslingen

Germany

+49 711 347-0

www.festo.com

Operating instruction

8203946

2023-12h

[8203948]

8203946

Translation of the original instructions

1 Applicable documents

All available documents for the product

èwww.festo.com/sp.

2 Safety

2.1 General safety instructions

–Only use the product if it is in perfect technical condition.

2.2 Intended use

This product is intended for proximity sensing of the piston position of Festo

drives that can be detected magnetically. The device is intended for use in an

industrial environment.

It is suitable for use with Festo Festo drives with T-slot (profile slot8) and round

cylinders and tie-rod cylinders with mounting kitsèwww.festo.com/catalogue.

2.3 Training of qualified personnel

Work on the product may only be carried out by qualified personnel who can

evaluate the work and detect dangers. The qualified personnel have skills and

experience in dealing with electrical (open-loop) control technology.

2.4 UL/CSA Certification

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/CSA certification information

Product category code NRKH, NRKH7

File number E232949

Considered standards UL 60947-1

UL 60947-5-2

CAN/CSA C22.2 No. 60947-1

CAN/CSA C22.2 No. 60947-5-2

UL mark

UL control number Industrial Control Equipment 2MD1

Tab. 1: UL/CSA certification information

Only for connection to a NEC/CEC Class 2 supply.

Locally installed conductors for the position transmitter must be separated from

the on-site and factory-installed conductors and uninsulated live parts of other

circuits that operate with more than 150V to earth. A permanent minimum

distance of 50.8mm (2inches) must be observed. If the locally installed conduc-

tors have been provided with approved insulating material that has an identical

or higher rated operating voltage than the other circuit involved, the minimum

distance need not be observed.

3 Additional information

–Contact the regional Festo contact if you have technical problems

èwww.festo.com.

–Accessories and spare parts èwww.festo.com/catalogue.

4 Product overview

4.1 Configuration

Fig. 1: Design of SMAT-8M

Retaining screw

Connecting cable, depending on

the version with a rotatable M8

plug or cable with open end

Red LED: piston not in sensing

range

Green LED: piston in sensing

range

4.2 Function

The position transmitter SMAT-8M is an electronic position transmitter with a 3D

Hall sensor arrangement, integrated signal processing, analogue voltage output

and optical operating status display.

The magnetic field of the piston magnet is detected, the magnetic field compo-

nents are evaluated internally and output within the sensing range as an ana-

logue displacement-proportional signal at the output. The sensing range varies

depending on the cylinder.

5 Assembly

Any mounting position can be used.

Fig. 2: Mounting

Internal hex key, spanner size

1.5mm

T-slot

1. Place the position transmitter in the T-slot of the drive.

2. Tighten the retaining screw.

–Maximum tightening torque: 0.3Nm

6 Installation, electrical

WARNING

Risk of injury due to electric shock.

• Use exclusively PELV circuits in accordance with IEC60204-1/EN60204-1 for

the electrical power supply (Protective Extra-Low Voltage, PELV).

• Observe the general requirements of IEC60204-1/EN60204-1 for PELV cir-

cuits.

• Use exclusively voltage sources that guarantee reliable electrical isolation from

mains power in accordance with IEC60204-1/EN60204-1.

1. Switch off the operating voltage.

2. Connect the connecting cable to the higher-level controller.

SMAT-8M-UE-0.3-M8D SMAT-8M-UE-2.5-OE

WH2

+24 V

0 V

M8x1, 4-pin, max. tightening torque: 0.3Nm

Tab. 2: Circuit diagram and pin allocation

7 Commissioning

The position transmitter SMAT-8M can be commissioned immediately without

additional initialisation.

NOTICE

Influence of the measured values by external magnetic fields.

External magnetic fields influence the measured values of the position trans-

mitter.

• Keep magnetic fields and magnetic materials away from the immediate vicinity

of the position transmitter.

• Move the position transmitter when determining the sensing range without a

tool or with a non-magnetic tool.

• Commission the position transmitter in the final application environment.

• Switch on operating voltage.

ÄLED on (depending on piston position èTab. 3 LED display in opera-

tion). Device is ready for operation.

The repetition accuracy is better at the centre of the sensing range than at the

edge.

• Position the position transmitter for critical applications in such a way that the

relevant measuring points are close to 5.5V.

8 Operating status and signal behaviour

Fig. 3: Signal characteristics SMAT-8M

LED

Green

LED

Red

Meaning Description

LED Green on, LED

Red off.

Analogue signal >1V…<10V:

The piston is located within the sensing range (range B

èFig. 3).

LED Green off, LED

Red on.

Analogue signal 0.5V:

The piston is outside the sensing range after switching on

the operating voltage (range A or C èFig. 3). The piston

position is unknown.

Analogue signal 1V: the piston has left the sensing range

in the direction of the connecting cable (range A èFig. 3).

Analogue signal 10V:

The piston has left the sensing range in the direction of

the LEDs (range C èFig. 3).

Tab. 3: LED display in operation

9 Fault clearance

9.1 Diagnostics via LED

LED

Green

LED

Red

Meaning Possible cause Remedy

Both LEDs off. Fault in power supply. Connect power supply.

Fault in connecting cable. Replace connecting cable.

Fault in sensor. Replace device.

LEDs flashing alter-

nately.

Internal error. Contact Festo regional

service.

Tab. 4: Diagnostics via LED

9.2 General malfunctions

Fault description Cause Remedy

Incorrect or unexpected

signals at the analogue

output

Unsuitable drive Use only suitable drives.

SMAT-8M defective Replace device.

Fault description Cause Remedy

Incorrect or unexpected

signals at the analogue

output

No operating voltage or unreliable oper-

ating voltage

Switch on operating

voltage. Maintain oper-

ating voltage range.

Short circuit or overload at output Correct short circuit or

overload.

Fault in connecting cable Replace connecting

cable.

Magnetic object close to the position trans-

mitter

Keep magnetic objects

away from the near

vicinity.

Tab. 5

10 Disassembly

1. Switch off operating voltage.

2. Disconnect all connections from the position transmitter.

3. Unscrew retaining screw.

4. Remove the position transmitter from the T-slot.

11 Technical data

SMAT-8M

General

Certificates, declaration of conformity èwww.festo.com/sp

Input signal/measuring element

Measured variable Position

Measurement principle magnetic

Sensing range1) [mm] ≤52

Signal processing

Max. travel speed [m/s] 3

Typical sampling interval [ms] 2

Output, general

Path resolution2) [mm] ≤0.2

Analogue output

Analogue output [V] 0…10

Sensitivity 1) [mm / V] Measuring range/9V

Typical linearity error1) [mm] ±1

Repetition accuracy [mm] 0.2

Repetition accuracy on quarter turn

actuator DRRD

[°] 1

Capacitive load maximum DC [nF] 100

Min. load resistance of voltage output3) [kΩ] 20

Electronics

Operating voltage DC [V] 15…30

Ready-state delay [ms] ≤200

Typical signal running time4) [ms] ≤8

Immission/emission

Ambient temperature [°C] –40…+80

Ambient temperature with flexible

cable installation

[°C] –20…+70

Recovery time [ms] 12.5ms in accordance with DINEN60947-5-7£

Degree of protection (in accordance

with EN 60529)

IP65/IP68 (condition IP68: test duration 24h)

Protection class (in accordance with

DIN VDE 0106-1)

III

1) Depending on the drive: see selection table in the catalogue

2) Resolution of travel = sensing range/921 (e.g. 0.027 mm with 25 mm sensing range)

3) Recommendation: connect resistor to the analogue output, typ. 20 kΩ

4) The signal running time is longer than the sampling interval due to dynamic filtering. Min. signal running

time = sampling interval 2ms; max. signal running time 8ms (4x filtering)

Tab. 6: Technical data

Produkspesifikasjoner

Merke:	Festo
Kategori:	Ikke kategorisert
Modell:	SMAT-8M-U-E-2,5-OE

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