Comprehensive Product Summary: M12P-4MD – 4-pin M12 Male Assembled Plug, Soldering Type (D-Coding)

---

### 1. Product Overview

Product Name: M12P-4MD
Model Number: M12P-4MD
Series: M12 Industrial Ethernet Connector Series
Article Number: M12P-4MD
Manufacturer: ORing Industrial Networking Corp.
Product Type: 4-pin M12 Male Assembled Plug, Soldering Type, D-Coding

The M12P-4MD is a precision-engineered industrial-grade connector designed for Ethernet and signal transmission applications in rugged environments. As part of ORing’s M12 connector family, it provides a reliable, high-performance interface for data and power connections in automation, transportation, and industrial networking systems. The D-coded configuration ensures compatibility with 100 Mbps Fast Ethernet networks and other D-coded M12 interfaces, offering secure, vibration-resistant connectivity in harsh conditions.

---

### 2. Key Features

- 4-Pin D-Coded Configuration: Optimized for 100 Mbps Fast Ethernet communication, ensuring reliable data transmission in industrial networks.
- Male Plug, Soldering Type: Designed for direct solder termination, providing a secure and permanent electrical connection.
- Rugged Industrial Design: Built to withstand vibration, shock, and environmental stress typical of industrial and outdoor installations.
- IP67 Protection (when mated): Ensures dust-tight and water-resistant performance, suitable for washdown and outdoor applications.
- Compact and Standardized M12 Interface: Conforms to IEC 61076-2-101 standards for M12 connectors, ensuring interoperability with other compliant devices.
- High Mechanical Durability: Threaded coupling mechanism provides a secure lock, preventing accidental disconnection.
- Wide Operating Temperature Range: Suitable for use in both standard and industrial-grade environments.
- Corrosion-Resistant Materials: Nickel-plated brass or stainless-steel housing options ensure long-term reliability in corrosive or humid conditions.
- Ease of Assembly: The soldering type design allows for straightforward field assembly and maintenance.
- Compatibility with ORing Accessories: Fully compatible with ORing’s M12 Ethernet cables, power supplies, and RF accessories for integrated system deployment.

---

### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Connector Type | M12 Male Plug |
| Coding | D-Coding (Ethernet 100 Mbps) |
| Number of Contacts | 4 pins |
| Termination Type | Soldering type |
| Contact Material | Gold-plated copper alloy |
| Housing Material | Nickel-plated brass or stainless steel (depending on variant) |
| Insulation Material | High-temperature resistant thermoplastic |
| Coupling Mechanism | Threaded M12 locking nut |
| Ingress Protection | IP67 (when properly mated) |
| Rated Voltage | 50 V AC/DC |
| Rated Current | Up to 4 A per contact |
| Contact Resistance | ≤ 10 mΩ |
| Insulation Resistance | ≥ 100 MΩ at 100 V DC |
| Operating Temperature Range | -40°C to +85°C |
| Flammability Rating | UL 94 V-0 |
| Mechanical Durability | > 100 mating cycles |
| Shielding | 360° EMI/RFI shielding for noise immunity |
| Mounting Type | Cable-mount, field-assembled |
| Compliance | IEC 61076-2-101, RoHS, REACH |

Physical Dimensions (typical):
- Overall Length: ~45 mm
- Outer Diameter: 12 mm (M12 thread)
- Weight: Approx. 20–25 g (depending on material and configuration)

---

### 4. Functionality

The M12P-4MD connector serves as a robust interface for Ethernet and signal transmission in industrial automation and control systems. Its D-coded pin layout supports 100BASE-TX Fast Ethernet communication, making it ideal for connecting industrial switches, PLCs, sensors, and field devices.

How It Works:
The connector’s four contacts are arranged according to the D-coding standard, ensuring correct polarity and signal mapping for Ethernet data pairs. The soldering termination allows direct attachment of conductors to the contact pins, ensuring low-resistance, vibration-proof electrical connections. When mated with a corresponding M12 female connector or cable assembly, the threaded coupling ensures a tight, sealed connection resistant to dust, moisture, and mechanical stress.

Use Cases and Applications:
- Industrial Ethernet networks (100BASE-TX)
- Factory automation and process control systems
- Transportation and railway communication systems
- Outdoor surveillance and IP camera installations
- Robotics and motion control equipment
- Machine-to-machine (M2M) communication
- Industrial IoT (IIoT) sensor networks

Compatibility:
The M12P-4MD is compatible with all D-coded M12 female connectors and cables, including ORing’s M12C-4M4F and M12C-4MRJ series. It can be integrated into Ethernet devices, junction boxes, or custom cable assemblies.

---

### 5. Components & Accessories

Included Components:
- 1 × M12P-4MD 4-pin male plug (soldering type)
- 1 × Cable gland and strain relief assembly
- 1 × Sealing O-ring for IP67 protection
- 1 × Assembly instruction sheet

Optional Accessories (from ORing product line):
- M12 Ethernet Cables:
- *M12C-4M4M-300D* – 4-pin M12 Male to M12 Male, 3 m, D-coding
- *M12C-4M4F-1000D* – 4-pin M12 Male to M12 Female, 10 m, D-coding
- *M12C-4MRJ-300D* – 4-pin M12 Male to RJ45 Plug, 3 m, D-coding
- Power Supplies:
- *DR-4512 / DR-4524* – 45W DIN-Rail power supplies (12VDC or 24VDC)
- *DR-75 / DR-120 / SDR-240 / SDR-480* – High-capacity DIN-Rail power supplies for industrial systems
- RF Accessories:
- *RFB-M2-150 / RFB-M2-1000* – Magnetic RF antenna bases
- *RFC-NM-SMR series* – Low-loss RF cables with N and SMA connectors
- Fiber and SFP Modules:
- *SFP100 / SFP1G series* – Fast and Gigabit Ethernet optical transceivers for extended network integration

These accessories enable complete system integration, from power delivery to data transmission and wireless connectivity.

---

### 6. Installation & Setup

Requirements:
- Compatible D-coded M12 female connector or cable assembly
- Appropriate cable diameter for solder termination (typically 4–6 mm)
- Soldering tools and heat-resistant workspace

Installation Steps:
1. Strip the cable jacket and prepare the conductors according to the wiring diagram.
2. Solder each conductor to the corresponding pin on the M12P-4MD connector.
3. Assemble the connector housing, ensuring the O-ring is properly seated for sealing.
4. Tighten the threaded coupling to achieve IP67 protection.
5. Verify continuity and insulation resistance before deployment.

Mounting Options:
- Inline cable connection
- Panel or enclosure feedthrough (with appropriate adapter)
- Integration into pre-assembled cable harnesses

Configuration:
No software configuration is required. The connector provides a passive electrical interface. Ensure correct pin assignment according to the D-coded Ethernet standard (pins 1–4 correspond to TX+, RX+, TX–, RX–).

---

### 7. Performance & Capabilities

Electrical Performance:
- Supports 100 Mbps Fast Ethernet (IEEE 802.3u)
- Low contact resistance ensures minimal signal loss
- High shielding effectiveness for EMI/RFI protection
- Stable performance under vibration and temperature fluctuations

Mechanical Performance:
- Threaded coupling ensures secure mating even under mechanical stress
- Resistant to shock, vibration, and cable strain
- Over 100 mating cycles without degradation

Environmental Performance:
- IP67-rated sealing prevents ingress of dust and water
- Operates reliably in temperatures from -40°C to +85°C
- Resistant to oil, chemicals, and UV exposure (depending on cable jacket material)

Limitations:
- Designed for 100 Mbps Ethernet (not suitable for Gigabit Ethernet, which requires X-coded connectors)
- Requires proper soldering technique to maintain electrical integrity
- Must be mated with compatible D-coded connectors to ensure correct operation

---

### 8. Standards & Compliance

Industry Standards:
- IEC 61076-2-101 (M12 connector standard)
- IEEE 802.3u (Fast Ethernet)
- ISO/IEC 11801 (Structured cabling)

Environmental & Safety Compliance:
- RoHS (Restriction of Hazardous Substances) compliant
- REACH (Registration, Evaluation, Authorization, and Restriction of Chemicals) compliant
- UL 94 V-0 flammability rating for insulation materials
- IP67 ingress protection rating (IEC 60529)

Quality Assurance:
Each connector undergoes electrical continuity, insulation resistance, and mechanical durability testing to ensure compliance with ORing’s industrial-grade quality standards.

---

### 9. Additional Information

Warranty:
- Standard 2-year limited warranty against manufacturing defects
- Extended warranty options available for industrial customers

Technical Support:
- Comprehensive documentation and wiring diagrams available at [www.oring-networking.com](https://www.oring-networking.com)
- Global technical support network for installation and troubleshooting assistance

Maintenance:
- Periodic inspection recommended for mechanical wear or corrosion
- Clean contacts with isopropyl alcohol if contamination occurs
- Replace O-ring if damaged to maintain IP67 sealing

Product Updates:
- ORing continuously enhances its M12 connector line to support evolving Ethernet standards and environmental requirements.
- Updated datasheets and accessory compatibility lists are available online.

---

### Summary

The M12P-4MD 4-pin M12 Male Assembled Plug (D-Coding, Soldering Type) is a high-reliability connector engineered for industrial Ethernet and automation applications. Combining robust mechanical design, IP67 environmental protection, and compliance with international standards, it ensures dependable performance in demanding environments. Its soldering termination provides a secure, low-resistance connection ideal for permanent installations, while its compatibility with ORing’s extensive accessory ecosystem enables flexible system integration.

Whether used in factory automation, transportation systems, or outdoor networking, the M12P-4MD delivers the durability, precision, and connectivity performance required for modern industrial communication infrastructures.