WTR1-P721B11

Features

Functional principle	Photoelectric proximity sensor
Functional principle detail	Background suppression
Actuator	Pneumatic, valve on board, with magnetic valve
Max. number of sensors	23, End Tap, 24 V supply voltage, 3 ft zones ¹⁾ 18, when powerd from the end of the IR daisy chain ¹⁾ 32, End Tap, 28 V supply voltage, 3 ft zones ¹⁾ 26, End Tap, 28 V supply voltage, 6 ft zones ¹⁾ 46, Center Tap, 24 V supply voltage, 3 ft zones ¹⁾ 36, Center Tap, 24 V supply voltage, 6 ft zones ¹⁾ 48, Center Tap, 28 V supply voltage, 3 ft zones ¹⁾ 48, Center Tap, 28 V supply voltage, 6 ft zones ¹⁾ 60, Dual Center Tap, 24 V supply voltage, 3 ft zones ¹⁾ 48, Dual Center Tap, 24 V supply voltage, 6 ft zones ¹⁾
Logical principle of operation	Single accumulation, single release, block (slug) accumulation, block (slug) release
Dimensions (W x H x D)	51.5 mm x 157 mm x 46 mm
Sensing range max.	100 mm … 900 mm 3.9 in … 35.4 in
Type of light	Infrared light
Light source	LED ²⁾
Light spot size (distance)	Ø 40 mm (900 mm) Ø 1.6 in (35.4 in)
Adjustment	Potentiometer
Special applications	ZoneControl

Mechanics/electronics

Supply voltage	21.6 V DC … 28.8 V DC ¹⁾
Ripple	< 5 V_pp ²⁾
Current consumption	67 mA ³⁾
Switching output	PNP
Switching mode	Dark switching
Signal voltage PNP HIGH/LOW	Single accumulation mode VS – ≤ 2.0 V (beam blocked) / 0 V (beam unblocked)
Output current I_max.	≤ 100 mA
Response time	2 ms
Switching frequency	250 Hz
Connection type	Male connector M12, 4-pin
Connection type for daisy chain	Predecessor: cable with female connector, M12, 4-pin, 2.0 m Upstream: connector M12, 4-pin
Circuit protection	A ⁴⁾ C ⁵⁾ D ⁶⁾
Protection class	II ⁷⁾
Weight	206 g, 7.3 oz
Housing material	Plastic, Glass fiber reinforced ABS plastic
Enclosure rating	IP54 NEMA 3
Shock and vibration resistance	According to IEC 68
Ambient operating temperature	–10 °C … +55 °C
Ambient temperature, storage	–40 °C … +75 °C
Medium for valves	Compressed air or neutral gases filtered, non-lubricated or lubricated
Design solenoid valve	3/2-way valve ⁸⁾
Mode of operation solenoid valve	Air to Brake (NO)
Connection type solenoid valve	Compressed air 3/8 ” diameter, control line 1/4 ” diameter
Coil ratings	24 V DC 1 W
Air flow rate	40 Nl/min 1.4 SCFM
Ventilation capacity	40 Nl/min, 1.4 SCFM
Operating pressure range	0 bar … 4.5 bar 0 psi … 65 psi
Response time solenoid valve	Partially open, 10 ms Open, 23 ms Close, 21 ms

Pneumatic

Coil ratings	24 V DC 1 W
Medium for valves	Compressed air or neutral gases filtered, non-lubricated or lubricated
Design solenoid valve	3/2-way valve ¹⁾
Connection type solenoid valve	Compressed air 3/8 ” diameter, control line 1/4 ” diameter
Air flow rate	40 Nl/min 1.4 SCFM
Ventilation capacity	40 Nl/min, 1.4 SCFM
Operating pressure range	0 bar … 4.5 bar 0 psi … 65 psi
Response time solenoid valve	Partially open 10 ms Open 23 ms Close 21 ms

Classifications