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The Autonics PR12-4DP is an M12 unshielded PNP normally open DC 3-wire inductive proximity switch belonging to the PR series. Specifically designed for non-contact detection of metallic objects, it features strong anti-interference capability, a comprehensive protection circuit, and easy installation and maintenance. It is widely used in industrial automated production lines, maquinas herramientas, packaging machinery and other fields.
- Parámetros técnicos básicos
| Parámetro | Valor | Observaciones |
| Modelo de producto | PR12-4DP | M12 unshielded type of PR series |
| Tipo de sensor | Inductive Proximity Switch | Detects metallic objects only |
| Distancia de detección | 4mm±10% | Standard test object: 12×12×1mm iron block |
| Tipo de montaje | Unshielded (Exposed) | Allows the sensing surface to protrude from metal mounting plate |
| Tipo de salida | PNP Normally Open (NO) | 3-wire DC output |
| Voltaje de funcionamiento | 10-30VCC | Valor típico: 12-24VCC |
| Corriente de salida nominal | 200mamá | Overcurrent protection value to prevent damage from overload |
| Consumo actual | ≤10mA | Low quiescent power consumption for energy efficiency |
| Response Frequency | 500Hz | Respuesta rápida, suitable for high-speed detection |
| voltaje residual | ≤1.5V | Ensures reliable signal recognition by controllers such as PLC |
| Clase de protección | IP67 | Dust and water proof, adaptable a entornos industriales hostiles |
| Temperatura de funcionamiento | -25°C~+70°C | Wide temperature design for different working conditions |
| Temperatura de almacenamiento | -30°C~+80°C | Broad conditions for transportation and storage |
| Longitud del cable | 2metro | Standard PVC cable, extendable to 10m (voltage drop to be noted) |
| Especificación del hilo | M12×1 | Standard cylindrical mounting thread |
| Estándares de certificación | CE, CCC, CAO, RoHS, Reino Unido | Compliant with international safety and environmental standards |
- Características y ventajas del producto
- Excellent Anti-interference Performance: Adopts Autonics self-developed dedicated IC, which significantly enhances anti-electromagnetic interference capability and adapts to the complex electromagnetic environment of industrial sites.
- Multi-protection Circuit: Built-in reverse power protection, surge protection and overcurrent protection to improve equipment reliability and service life.
- Long Service Life Design: No mechanical contacts, theoretical service life of more than 10⁸ operations, far exceeding mechanical switches.
- Instalación flexible: Unshielded design allows the sensing surface to protrude from the metal mounting plate, ahorrando espacio de instalación.
- Clear Status Indication: Built-in LED indicators display power (verde) and output (orange) status in real time.
- High Interchangeability: Standard M12 size, can directly replace products of the same specification from other brands.
- Escenarios de aplicación
| Campo de aplicación | Aplicación típica | Advantage Embodiment |
| Líneas de producción automatizadas | Part counting, position locating, in-place detection | Non-contact detection, no wear, improved production line efficiency |
| Máquinas herramienta | Tool position detection, worktable positioning, safety door monitoring | Respuesta rápida, resistant to oil and coolant interference |
| Maquinaria de embalaje | Packaging material in-place detection, sealing position control | Protección IP67, adaptable to humid and dusty environments |
| Conveying Systems | Material presence/absence detection, conveying speed monitoring | Detección a larga distancia, estable y confiable |
| Fabricación de automóviles | Body position detection, component assembly positioning | Resistant to welding spark interference, adaptable a ambientes de alta temperatura |
| Warehousing and Logistics | Shelf position detection, stacker positioning | Bajo consumo de energía, adecuado para funcionamiento continuo a largo plazo |
- Guía de instalación y cableado
4.1 Puntos clave de instalación
| Paso | Operation Instructions | Notas |
| Preparación de la instalación | Select a flat metal surface and reserve sufficient installation space | For unshielded mounting, the sensing surface must protrude ≥5mm from the metal plate |
| Thread Fixation | Tighten with an M12 wrench, torque ≤5N·m | Avoid excessive force to prevent thread or sensor damage |
| Spacing Requirement | Spacing ≥8mm when multiple sensors are installed side by side | Prevent mutual interference from affecting detection accuracy |
| Sensing Distance Setting | The actual sensing distance is recommended to be within 70% del valor nominal (≤2.8mm) | Ensure stable detection and avoid misoperation |
| Cable Routing | Avoid parallel laying with power lines, keep a distance of ≥30cm when crossing | Reduce electromagnetic interference, shielded cable is recommended |
4.2 Método de cableado (DC 3-wire)
| Color | Función | Instrucciones de cableado |
| Marrón | V+ | Connect to 10-30VDC positive pole |
| Azul | V- | Connect to power negative pole/common terminal |
| Negro | Producción (NO) | PNP normally open signal, outputs high level (close to power voltage) when a metallic object is detected |
- Solución de problemas y mantenimiento
| Fenómeno de falla | Posibles causas | Métodos de solución de problemas |
| LED indicators not lit | 1. Poor power connection or abnormal voltage | 1. Check power voltage (10-30VCC) |
| 2. Cable breakage or poor contact | 2. Check cable connections and replace if necessary | |
| 3. Reverse power polarity | 3. Confirm brown wire to positive pole and blue wire to negative pole | |
| No output signal | 1. Sensing distance exceeds the rated value | 1. Adjust installation distance to ≤2.8mm |
| 2. Detected object is non-conductive metal | 2. Replace with ferromagnetic metal test object | |
| 3. Excessive load in the output circuit | 3. Ensure load current ≤200mA | |
| 4. Sensor damage | 4. Replace with a new sensor | |
| Mal funcionamiento frecuente | 1. Sensing distance too close | 1. Appropriately increase the sensing distance |
| 2. Interferencia electromagnética grave | 2. Keep away from interference sources such as inverters and motors | |
| 3. Large power supply fluctuation | 3. Install a power filter | |
| 4. Temperatura ambiente fuera de rango | 4. Improve heat dissipation or thermal insulation conditions | |
| Unstable output signal | 1. Uneven or shaking detected object surface | 1. Adjust the position of the detected object or add guides |
| 2. Loose sensor | 2. Retighten the sensor | |
| 3. Poor cable contact | 3. Check cable connections and replace if necessary |
- Same Series Product Replacement Comparison Table
For Autonics PR series M12 size products, different output types and mounting types can be selected according to requirements:
| Modelo | Tipo de salida | Tipo de montaje | Escenario aplicable | Descripción de reemplazo |
| PR12-4DN | NPN Normally Open | Unshielded | PLC input with sinking (PNP) interfaz | Only different in output type from PR12-4DP, other parameters are consistent |
| PR12-4DP2 | PNP Normally Closed | Unshielded | Detection occasions requiring normally closed signals | Opposite output logic, other parameters are consistent |
| PR12-4DN2 | NPN Normally Closed | Unshielded | Sinking interface + normally closed signal requirement | Both output type and logic are opposite |
| PRD12-4DP | PNP Normally Open | Shielded (Flush-mount) | Sensing surface needs to be flush with the metal plate for installation | Different mounting type, same sensing distance |
| PRDW12-4DP | PNP Normally Open | Shielded + Conector | Occasions requiring frequent disassembly and maintenance | With M12 connector for easy replacement |
- Cross-brand Model Comparison Table (Coincidencia de parámetros principales)
| Marca | Modelo | Parámetros principales | Notas de reemplazo |
| Schneider | XS112BLPAM12 | PNP NO, 4milímetros, M12, unshielded, IP67 | Fully matched in output type and sensing distance, can be directly interchanged |
| siemens | 3RG4012-0AG30 | PNP NO, 4milímetros, M12, unshielded, IP67 | Response frequency 400Hz (slightly lower than Autonics 500Hz), suitable for general applications |
| Omrón | E2E-X4MD1-Z | PNP NO, 4milímetros, M12, unshielded, IP67 | Operating voltage 12-24VDC (narrower range), pay attention to power matching |
| Pepperl+Fuchs | NJ1.5-8GM-N | PNP NO, 4milímetros, M12, unshielded, IP67 | Sensing distance 1.5mm (corto), need to adjust installation position |
| Turck | NI12U-EM40WD-AP6X | PNP NO, 4milímetros, M12, unshielded, IP67 | Cable length 3m (1m longer than Autonics), installation space to be adapted |
| Alternativa Doméstica | Delixi CDJ12-4DP | PNP NO, 4milímetros, M12, unshielded, IP67 | Rendimiento de alto costo, parámetros consistentes, suitable for projects with limited budget |
- Selection and Procurement Suggestions
- Selección del tipo de salida: Select PNP or NPN output according to the input type of the controller (PLC/DCS). PR12-4DP is PNP normally open, suitable for sourcing input systems.
- Mounting Type Determination: Unshielded type (PR12 series) is suitable for space-constrained occasions, while shielded type (PRD12 series) is suitable for scenarios where the sensing surface needs flush mounting.
- Sensing Distance Setting: En aplicaciones prácticas, it is recommended to use within 70% of the rated sensing distance (≤2.8mm) to ensure detection stability and reliability.
- Coincidencia de carga: Ensure the load current ≤200mA; a relay is required to expand the output capacity if the load exceeds the limit.
- Longitud del cable: The standard 2m cable can be extended to 10m, but voltage drop must be noted. It is recommended to increase the supply voltage by 1V for every 5m extension.
- Procurement Channel: Choose authorized Autonics distributors to ensure genuine original products and enjoy 12-month warranty service.
- Key Notes for Replacement and Selection
- Prioridad de coincidencia de parámetros
Must ensure: Distancia de detección, tipo de salida (PNP/NPN), mounting type (shielded/unshielded), operating voltage are consistent with the original equipment.
Key matching: Thread specification (M12), clase de protección (IP67), corriente de salida (≥200mA).
Emparejamiento funcional: Response frequency (≥500Hz), protection circuit type.
- Compatibilidad de instalación
For unshielded mounting, the sensing surface must protrude ≥5mm from the metal mounting plate, otherwise the sensing distance will be affected.
Shielded type can be fully embedded in the metal mounting plate without affecting detection performance.
- Notas de cableado
PNP output sensors must be connected to the sourcing input interface of the PLC.
Ensure correct power polarity during wiring to avoid damage to the sensor and controller.
- Adaptabilidad ambiental
For high-temperature environments (>60°C), it is recommended to select high-temperature resistant models or add heat dissipation measures.
For humid environments, ensure the cable joints are well sealed to prevent water ingress.
- Recommended Priority for Brand Replacement
| Prioridad | Marca | Modelo | Motivo recomendado |
| 1 | Autonics | PR12-4DN/PRD12-4DP | Same brand replacement, fully consistent parameters, optimal compatibility |
| 2 | Schneider | XS112BLPAM12 | Internationally renowned brand, calidad confiable, comprehensive technical support |
| 3 | Omrón | E2E-X4MD1-Z | Velocidad de respuesta rápida, fuerte capacidad antiinterferencia, suitable for precision detection |
| 4 | Delixi/Chint | CDJ12-4DP/NJ12-4DP | Rendimiento de alto costo, primera opción para reemplazo doméstico, adaptable to domestic projects |
| NAME | TYPE | BRAND |
| Inductive Proximity Sensor | PR12-4DP | Autonics/72CNY |
| Proximity Sensor PR18 | PR18-8DN | Autonics/72CNY |
| Timer H3CR-A8 + Enchufe | H3CR-A8 | Dappra |
| Timer H3CR-A8 + Enchufe | H3CR-A8 | Dappra |
| Sensor de proximidad | SN04-N | Dappra |
| Power Relay 110V | LY2N-J | Dappra |
| Relay 12A | RXM2AB2P7 | Dappra |
| Sensor M18 | D18-3A30N1 | Dappra |
| Sensor SN04-N | SN04-N | Dappra |
| Relay 4PDT 230VAC | RXM4AB2P7 | Dappra |
| Relay 4PDT 24VDC | RXM4AB2BD | Dappra |
| Sensor SN04-N | SN04-N | Dappra |
| Toma de relé | PF083A | Generic |
| Toma de relé 8 Alfiler | PTF08A | Generic |
| Toma de relé | PF083A PL35 | Generic |
| Relay Counter Digital | DH48S-S | Omrón |
| Sensor fotoeléctrico | E3Z-D62 | Omrón |
| Sensor de proximidad | E2E-X2D1-N | Omrón |
| Minutero + Enchufe | H3CR-A8 DC24V | Omrón |
| Power Relay | G2R-1A-E 24VDC | Omrón |
| Sensor fotoeléctrico | E3Z-D61 | Omrón |
| Sensor R4M1 | E3JK-R4M1 | Omrón |
| Sensor R4M2 | E3JK-R4M2 | Omrón |
| Sensor de proximidad | TL-Q5MC1 | Omrón |
| Timer DH48S-2Z | DH48S-2Z | Omrón |
| Sensor Proximity NPN | PSN17-5DN | Autonics |
| Jumper Bar Terminal Block | FBS10-5 | Contacto Fénix |
| M12 Mounting Bracket | PS59 | Generic |
| Timer Relay 11 Alfiler | H3CR-A 220V | Omrón |
| Relé de potencia de uso general | G7L-2A-TUB | Omrón |
| Sensor Proximity NPN M18 8mm | PRL18-8DN | Autonics |
| Control Relay DPDT 8 Alfiler | LY2N-J DC 12V 10A | DAPPRA |
| Terminal Block Fixed Bridge Jumper | UK5N | Generic (UK Type) |
| Power Relay PCB SPDT 16A | G2R-1-E DC24V | Omrón |
| Sensor Fotolistrik M18 | CDR-30X | FOTEK |
| Sensor Proximity Kapasitif M18 | CR18-8DN | Autonics |
| Modul Relay PLC 16 Channel | G2R-1-E 16A 24V DC PNP | OMRON (Relé) / Generic (Modul) |
| Sensor Proximity Induktif NPN NO | LJ18A3-8-Z/BX | Generic |
| Sensor Proximity Induktif PNP NO M12 | LJ12A3-4-Z/BY M12 | Generic |
| Jumper Bar Terminal Block | FBS 2-5 | Contacto Fénix (IDENTIFICACIÓN) |
| Timer Relay 4PDT 8 Alfiler | H3Y-4 AC220V 5A 60S | Omrón (IDENTIFICACIÓN) / Generic |
| Sensor Fotolistrik Reflektif | BRP100-DDT | Autonics |
| Sensor Proximity NPN M18 5mm | PR18-5DN | Autonics |
| Sensor Fotolistrik NPN | BR100-DDT 12-24 VCC | Autonics |
| Sensor Proximity NPN M8 1.5mm | PR08-1.5DN | Autonics |
