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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 72/4 unpolarized retro-reflective photoelectric sensor, 12-30 V DC, PNP light/dark switching output, 0.1-4 m range, IP67 metal housing, 2 m cable.
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| MFR / Brand | Leuze |
|---|---|
| MPN | RK 72/4 |
| Model | 50000413 |
| Condition | Used |
|---|---|
| Type | Retro-Reflective Photoelectric Sensor |
| Current Type | DC |
| Base Number | RK 72 |
| Industry Terms | Retro-reflective photoelectric sensor, reflex light barrier, photo eye, reflector sensor |
| Common Misspellings | Leuse RK72/4, RK 724, RK72-4 |
| Input Voltage | 12-30 V DC |
| Termination Type | Cable, 3-wire, 2 m |
| Output Type | PNP transistor, light/dark switchable |
| Sensing Technology | Retro-reflective, unpolarized, infrared LED |
| Analog Digital | Digital |
| Sensor Type | Photoelectric |
| Item Width | 15 mm |
| Item Height | 90 mm |
| Item Length | 35 mm |
| Minimum Operating Temperature | -20 °C |
| Maximum Operating Temperature | 60 °C |
| Mpn Variants | RK 72/4, RK72/4, RK-72/4, 50000413 |
| Manufacturer Status | Discontinued |
| Compatible With Replaces | Leuze successor device: RK18B.1/4P-6000 (part no. 50117374); plug version: RK 72/4 S (part no. 50000419) |
| Ip Rating | IP67 |
| Mounting Type | Through-hole mounting |
| Compatible Model | Leuze RK18B.1/4P-6000 (50117374) successor |
The Leuze RK 72/4 is an unpolarized retro-reflective photoelectric sensor from the Leuze 72 series, Leuze part no. 50000413. It sends an infrared LED beam to a reflector and switches when an object interrupts the beam. Supply Voltage: 12–30 V DC. Output: one PNP transistor switching output, light/dark switchable. Housing: red metal housing with a glass lens cover, IP67.
Operating Principle: Reflection principle, unpolarized retro-reflective. Light Source: Infrared LED. Operating Range: 0.1–4 m guaranteed. Operating Range Limit: 0.1–6 m typical. Supply Voltage: 12–30 V DC. Protective Circuit: Polarity reversal protection. Number of Switching Outputs: 1. Switching Element: PNP transistor. Switching Principle: Light/dark switchable. Switching Frequency: 100 Hz. Response Time: 5 ms. Connection: Cable, 3-wire, 2,000 mm long. Degree of Protection: IP67. Operating Temperature: −20 to 60 °C. Storage Temperature: −30 to 70 °C. Customs Tariff Number: 85365019. ETIM Class: EC002717. ECLASS: 27270902.
Dimensions (W x H x L): 15 mm x 90 mm x 35 mm. Housing Material: Metal. Lens Cover: Glass. Housing Color: Red. Fastening: Through-hole mounting, or via an optional Leuze mounting device.
Leuze lists the RK 72/4 as no longer available and names the RK18B.1/4P-6000 (part no. 50117374) as its successor device, an unpolarized retro-reflective sensor with a 0–6 m maximum operating range. The RK 72/4 S (part no. 50000419) is the same sensor with a 4-pin plug connection in place of the 2 m cable.
CAD model and data sheet: available from Leuze (leuze.com).
What is the Leuze part number for the RK 72/4?
Leuze part no. 50000413.
What output does the RK 72/4 have?
One PNP transistor switching output, light/dark switchable, with a 100 Hz switching frequency and 5 ms response time.
What replaced the Leuze RK 72/4?
Leuze names the RK18B.1/4P-6000, part no. 50117374, as the successor device.
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