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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, máquinas-ferramentas, packaging machinery and other fields.
- Parâmetros técnicos principais
| Parâmetro | Valor | Observações |
| Product Model | PR12-4DP | M12 unshielded type of PR series |
| Sensor Type | Inductive Proximity Switch | Detects metallic objects only |
| Distância de detecção | 4mm±10% | Standard test object: 12×12×1mm iron block |
| Tipo de montagem | Unshielded (Exposed) | Allows the sensing surface to protrude from metal mounting plate |
| Tipo de saída | PNP Normally Open (NÃO) | 3-wire DC output |
| Tensão operacional | 10-30CCV | Typical value: 12-24CCV |
| Corrente de saída nominal | 200mA | Overcurrent protection value to prevent damage from overload |
| Consumo Atual | ≤10mA | Low quiescent power consumption for energy efficiency |
| Response Frequency | 500Hz | Resposta rápida, suitable for high-speed detection |
| Residual Voltage | ≤1.5V | Ensures reliable signal recognition by controllers such as PLC |
| Classe de Proteção | IP67 | Dust and water proof, adaptable to harsh industrial environments |
| Temperatura operacional | -25°C~+70°C | Wide temperature design for different working conditions |
| Temperatura de armazenamento | -30°C~+80°C | Broad conditions for transportation and storage |
| Cable Length | 2eu | Standard PVC cable, extendable to 10m (voltage drop to be noted) |
| Thread Specification | M12×1 | Standard cylindrical mounting thread |
| Padrões de Certificação | CE, CCC, EAC, RoHS, UKCA | Compliant with international safety and environmental standards |
- Características e vantagens do produto
- 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.
- Instalação flexível: Unshielded design allows the sensing surface to protrude from the metal mounting plate, saving installation space.
- 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.
- Cenários de aplicação
| Campo de Aplicação | Aplicação Típica | Advantage Embodiment |
| Linhas de produção automatizadas | Part counting, position locating, in-place detection | Non-contact detection, no wear, improved production line efficiency |
| Máquinas-ferramentas | Tool position detection, worktable positioning, safety door monitoring | Resposta rápida, resistant to oil and coolant interference |
| Máquinas de embalagem | Packaging material in-place detection, sealing position control | Proteção IP67, adaptable to humid and dusty environments |
| Conveying Systems | Material presence/absence detection, conveying speed monitoring | Long-distance detection, stable and reliable |
| Fabricação Automotiva | Body position detection, component assembly positioning | Resistant to welding spark interference, adaptável a ambientes de alta temperatura |
| Warehousing and Logistics | Shelf position detection, stacker positioning | Baixo consumo de energia, suitable for long-term continuous operation |
- Guia de instalação e fiação
4.1 Pontos-chave de instalação
| Etapa | Operation Instructions | Notas |
| Preparação de instalação | 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% do 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 fiação (DC 3-wire)
| Cor | Função | Wiring Instructions |
| Marrom | V+ | Connect to 10-30VDC positive pole |
| Azul | V- | Connect to power negative pole/common terminal |
| Preto | Saída (NÃO) | PNP normally open signal, outputs high level (close to power voltage) when a metallic object is detected |
- Troubleshooting and Maintenance
| Fenômeno de falha | Possíveis causas | Métodos de solução de problemas |
| LED indicators not lit | 1. Poor power connection or abnormal voltage | 1. Check power voltage (10-30CCV) |
| 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 | |
| Frequent misoperation | 1. Sensing distance too close | 1. Appropriately increase the sensing distance |
| 2. Severe electromagnetic interference | 2. Keep away from interference sources such as inverters and motors | |
| 3. Large power supply fluctuation | 3. Install a power filter | |
| 4. Ambient temperature out of range | 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 saída | Tipo de montagem | Cenário Aplicável | Replacement Description |
| PR12-4DN | NPN Normally Open | Unshielded | PLC input with sinking (NPN) interface | 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 (Correspondência de parâmetros principais)
| Marca | Modelo | Parâmetros principais | Notas de substituição |
| 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 |
| Omron | 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 (curto), 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 | Desempenho de alto custo, parâmetros consistentes, suitable for projects with limited budget |
- Selection and Procurement Suggestions
- Output Type Selection: 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: Em aplicações práticas, it is recommended to use within 70% of the rated sensing distance (≤2.8mm) to ensure detection stability and reliability.
- Correspondência de carga: Ensure the load current ≤200mA; a relay is required to expand the output capacity if the load exceeds the limit.
- Cable Length: 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
- Prioridade de correspondência de parâmetros
Must ensure: Distância de detecção, tipo de saída (PNP/NPN), mounting type (shielded/unshielded), operating voltage are consistent with the original equipment.
Key matching: Thread specification (M12), protection class (IP67), output current (≥200mA).
Functional matching: Response frequency (≥500Hz), protection circuit type.
- Compatibilidade de instalação
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 fiação
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.
- Adaptabilidade Ambiental
Para ambientes de alta temperatura (>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
| Prioridade | Marca | Modelo | Motivo recomendado |
| 1 | Autonics | PR12-4DN/PRD12-4DP | Same brand replacement, fully consistent parameters, optimal compatibility |
| 2 | Schneider | XS112BLPAM12 | Internationally renowned brand, qualidade confiável, comprehensive technical support |
| 3 | Omron | E2E-X4MD1-Z | Fast response speed, strong anti-interference capability, suitable for precision detection |
| 4 | Delixi/Chint | CDJ12-4DP/NJ12-4DP | Desempenho de alto custo, first choice for domestic replacement, adaptable to domestic projects |
| NAME | TYPE | BRAND |
| Inductive Proximity Sensor | PR12-4DP | Autonics/72CNY |
| Proximity Sensor PR18 | PR18-8DN | Autonics/72CNY |
| Timer H3CR-A8 + Soquete | H3CR-A8 | Dappra |
| Timer H3CR-A8 + Soquete | H3CR-A8 | Dappra |
| Sensor de proximidade | 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 |
| Soquete de relé | PF083A | Generic |
| Soquete de relé 8 Alfinete | PTF08A | Generic |
| Soquete de relé | PF083A PL35 | Generic |
| Relay Counter Digital | DH48S-S | Omron |
| Sensor fotoelétrico | E3Z-D62 | Omron |
| Sensor de proximidade | E2E-X2D1-N | Omron |
| Timer + Soquete | H3CR-A8 DC24V | Omron |
| Power Relay | G2R-1A-E 24VDC | Omron |
| Sensor fotoelétrico | E3Z-D61 | Omron |
| Sensor R4M1 | E3JK-R4M1 | Omron |
| Sensor R4M2 | E3JK-R4M2 | Omron |
| Sensor de proximidade | TL-Q5MC1 | Omron |
| Timer DH48S-2Z | DH48S-2Z | Omron |
| Sensor Proximity NPN | PSN17-5DN | Autonics |
| Jumper Bar Terminal Block | FBS10-5 | Contato Fênix |
| M12 Mounting Bracket | PS59 | Generic |
| Timer Relay 11 Alfinete | H3CR-A 220V | Omron |
| Relé de potência de uso geral | G7L-2A-TUB | Omron |
| Sensor Proximity NPN M18 8mm | PRL18-8DN | Autonics |
| Control Relay DPDT 8 Alfinete | LY2N-J DC 12V 10A | DAPPRA |
| Terminal Block Fixed Bridge Jumper | UK5N | Generic (UK Type) |
| Power Relay PCB SPDT 16A | G2R-1-E DC24V | Omron |
| Sensor Fotolistrik M18 | CDR-30X | FOTEK |
| Sensor Proximity Kapasitif M18 | CR18-8DN | Autonics |
| Modul Relay PLC 16 Canal | 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 | Contato Fênix (ID) |
| Timer Relay 4PDT 8 Alfinete | H3Y-4 AC220V 5A 60S | Omron (ID) / Generic |
| Sensor Fotolistrik Reflektif | BRP100-DDT | Autonics |
| Sensor Proximity NPN M18 5mm | PR18-5DN | Autonics |
| Sensor Fotolistrik NPN | BR100-DDT 12-24 CCV | Autonics |
| Sensor Proximity NPN M8 1.5mm | PR08-1.5DN | Autonics |
