WTA 24 Distance sensors WTA 24: Distance measure- Distance sensors ment and object detection in one device The WTA 24 with its compact metal housing is immune to impacts, vibrations and other disturbances. This and numerous other features make this device suitable for a large number of applications such as profile measurement, the detection of coil diameters, level monitoring, for positioning tasks in warehous- ing and handling systems and min./max. regulation with combined switching points. Non-contact distance measure- ment and object detection – the N WTA 24 photoelectric proximity switch combines both these func- tions. The sensor, available in three versions, covers scanning distances ranging from 100 to 3,000 mm. The triangulation principle is used to detect the presence and position of an object. The presence of an object is signalled via the digital device outputs; continuous distance values are further processed by means of the analogue interface. 446 SENSICK CATALOGUE WTA 24 m On circular cross- cut saws, the width is measured con- tinuously while the boards are automati- cally advanced. WTA 24 sensors see to this reliably. n On circular cross- cut saws, the width is measured con- tinuously while the boards are automati- cally advanced. m In continuous tyre production, supply loops regulate web tension and, therefore, the tensile force in the material. The WTA 24 ensures that the loops are fed evenly. SENSICK CATALOGUE 447 WTA 24 Photoelectric proximity switches with analogue output Dimensional drawing Scanning distance 100...3000 mm Photoelectric proximity switches 7 14 17.5 10Analogue + digital output 3 High resolution 2 4 Switching outputs adjustable α 5 1 using simple teach-in Compact housing 6 Insensitive to ambient light M5 8 9 11.8 30 65 27 Adjustments possible 1 Standard direction of object being scanned All types 2 Output Q function indicator 2 3 Alignment sight 4 Output Q function indicator 1 5 Centre of transmitter’s optical axis 6 Centre of receiver’s optical axis 7 M5 threaded mounting hole, 6 mm deep Teach 8 M5 threaded mounting hole in Q1 9 Rotatable plug 1 0 1 2 Q2 1 0 ”Teach- in” programming switch 1 1 ”Teach- in” function indicator OK Q 1 2 ”Q /Q ” program switch 1 2 1 1 1 3 1 3 ”Q/Q” program switch Q Adjustment instructions Programming the switching outputs: 1. Move ”Q /Q ” switch to the switching output to be 1 2 _ programmed. Move ”Q/Q” switch to the desired switching mode. 2. Place object at the required switching distance. 3. Press ”Teach- in” key. ”OK” indicator illuminates when the switching limit has been saved to the memory. Connection type 4. Repeat steps 1/2/3 for the second switching output. CV 5. The device is ready for operation. All types Accessories page 5-pin, M 12 Cable receptacles 496 1 brn Mounting brackets 510 L+ Cooling plates 556 4 blK Q 1 Weather covers 556 3 blu M 2 wht Q 2 5 gra Q A 448 SENSICK CATALOGUE 25 62 6.5 14 4.7 88 WTA 24 Technical Data WTA 24-P 5201 5401 5501 5201 S04 1) Light source , light type LED, infrared light 2) Supply voltage V 12...30 V DC S 3) Ripple < 5 V SS 4) Current consumption < 100 mA Switching outputs Q , Q PNP, reversible 1 2 Output voltage HIGH = V –<2V/LOW =<2V S Output current l max. 100 mA A 5) Response time 5ms 6) Max. switching frequency 100 Hz 5) Response time 50 ms 6) Max. switching frequency 10 Hz 5) Response time 100 ms 6) Max. switching frequency 5 Hz 7) 8) Analogue output 4...20 mA Connection type Plug 9) VDE protection class V 10) Circuit protection A, B, C Enclosure rating IP 67 8) Ambient temperature T Operation – 10 °C...+ 55 °C A Storage – 25 °C...+ 75 °C Shock load To IEC 68 Temperature drift 0.2%/K (relative to measured value) 1) Average service life 100,000 h 4) Without load 10) A = V connections reverse-polarity S at T = + 25 °C 5) Signal transit time with resistive load protected A 2) Limit values 6) Object 50: 50 B = Inputs Q and Q short-circuit 1 2 3) May not exceed or fall short of 7) In capture range 3 or 21 mA protected V tolerances 8) R = 0...500 Ω C = Interference pulse suppression S 9) Reference voltage 50 V DC Measurement range, reproducibility and accuracy WTA 24- P 5201 P 5401 P 5501 P 5201 S04 Measurement range 250...350 mm 600...1200 mm 1000...3000 mm 100...500 mm Capture range 200...250 mm 400...600 mm 500...1000 mm 80...100 mm Light spot diameter 4...8 mm 15...30 mm 20...50 mm 8...12 mm (90 % core light) Angle of dispersion α 7° 2° 0.5° 7° Reproducibility White (90 %) 1.0 % White (90 %) 1.5 % White (90 %) 4.0 % White (90 %) 1.0 % (relative to measured value, Grey (18 %) 1.0 % Grey (18 %) 2.5 % Grey (18 %) 10.0 % Black (6 %) 2.0 % 1) 2) object 100 x 100 mm, Black (6 %) 1.5 % Black (6 %) 4.0 % Black (6 %) 8.0 % ambient surroundings remain constant) Accuracy blanc (90 %) 1.5 % blanc (90 %) 3.0 % blanc (90 %) 5.5 % White (90 %) 6.5 % (relative to measured value, Grey (18 %) 2.0 % Grey (18 %) 5.0 % Grey (18 %) 13.0 % Grey (18 %) 10.5 % 1) 2) object 100 x 100 mm, Black (6 %) 4.0 % Black (6 %) 8.0 % Black (6 %) 10.0 % Black (6 %) 11.5 % ambient surroundings remain constant) 1) up to 1000 mm 2) up to 2000 mm Order information Type Part no. Q (mA) A WTA 24-P 5201 1 011 504 20 Measurement WTA 24-P 5401 1 011 505 range WTA 24-P 5501 1 011 515 WTA 24-P 5201 S04 1 015 804 3 mA 4...20 mA 21 mA 4 mm SENSICK CATALOGUE 449 Capture range Capture range