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HMI Panels and PLC Modules: What They Do and How to Match a Replacement
When an HMI panel goes dark or a PLC module stops communicating, the machine it
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Leuze RK 72/2 retro-reflective photoelectric sensor, 12-30 VDC, 0 to 6 m range, 880 nm infrared, 5 ms response, IP67 diecast metal housing, PNP or NPN output.
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| MFR / Brand | Leuze |
|---|---|
| MPN | RK 72/2 |
| Model | RK72/2 |
| Condition | Used |
|---|---|
| Type | Retro-Reflective Photoelectric Sensor |
| Body Style | Rectangular |
| Current Type | DC |
| Base Number | RK 72 |
| Industry Terms | retro-reflective sensor, reflex photoelectric sensor, photo eye, light barrier with reflector |
| Common Misspellings | Leuse RK72, Leuze RK 722, RK72-2 |
| Application Types | Conveyor object detection, packaging machinery, material handling, automated manufacturing |
| Output Type | PNP or NPN transistor |
| Mpn Variants | RK 72/2, RK72/2, RK-72/2, 50000396, 500 00396, 71225 |
| Compatible With Replaces | Leuze RK 72/2 (50000396) |
| Additional Attributes | Function: light/dark switching by polarity reversal; Protective circuit: polarity reversal and short circuit protection; Bias current: 50 mA max; Signal voltage high/low: UB-3V / 2V; Residual ripple: 15% of UB max; Storage temperature: -30 °C to +70 °C; LED class 1 per EN 60825-1; Optics: glass lens; Mounting accessory: BT 92 |
| Series | RK 72 |
| Ip Rating | IP67 |
| Item Weight | 150 g (0.33 lb) |
| Housing Material | Diecast metal |
The Leuze RK 72/2 is a retro-reflective photoelectric sensor from the Leuze RK 72 series, Leuze part number 500 00396. It uses a modulated infrared LED and a reflector to detect objects that interrupt the light path. Slim diecast metal housing with a glass lens.
Sensing Principle: Retro-reflective. Typical Operating Range Limit: 0 to 6 m with a TK(S) 100×100 reflector. Operating Range: 0.1 to 4 m with a TK(S) 100×100 reflector. Light Source: LED, modulated. Wavelength: 880 nm infrared. Switching Frequency: 100 Hz. Response Time: 5 ms. Operating Voltage: 12 to 30 VDC. Bias Current: 50 mA maximum. Switching Output: PNP or NPN transistor output. Output Current: 100 mA maximum. Function: Light/dark switching by reversing the polarity. Protective Circuit: Polarity reversal protection and short circuit protection. Indicator: Red LED on top of housing. Housing: Diecast metal. Optics: Glass lens. Weight: 150 g. Ambient Temperature: -20 °C to +60 °C operating, -30 °C to +70 °C storage. Protection Class: IP67. LED Class: 1 per EN 60825-1.
Mounting: Through-holes and M4 threads for front-side mounting. Mounting System: Leuze BT 92 bracket.
Replaces Leuze RK 72/2, part number 500 00396, in the RK 72 retro-reflective family. Related RK 72 variants: RK 72/4 (50000413), RK 72/4,5000 (50000415), RK 72/4 L (50017372) and RK 72/4 S (50000419). Additional marking on this unit: 71225. Data sheet: available from Leuze (leuze.com).
What is the sensing range of the Leuze RK 72/2?
The typical operating range limit is 6 m with a 100 x 100 mm reflector, and the recommended operating range is 0.1 to 4 m.
What supply voltage does the RK 72/2 use?
It runs on 12 to 30 VDC with a bias current of up to 50 mA.
How is light or dark switching selected on the RK 72/2?
Light or dark switching is selected by reversing the polarity of the supply connection.
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