English
The M12 Series Industrial Connector is Reunion's most versatile interconnect platform, designed to serve the full range of factory automation applications — from simple discrete sensors to high-speed industrial Ethernet networks. Certified to DIN EN 61076‑2‑101/109/111, this threaded circular connector combines a rugged 12mm interface with IP67-rated environmental sealing, making it suitable for washdown environments, outdoor installations, and machinery with continuous vibration.
The connector's all-metal construction provides mechanical durability and EMI shielding, while the threaded locking mechanism ensures vibration-resistant mating. Available in 2- to 17-pin configurations across multiple coding options — A (sensors/actuators), B (PROFIBUS/DeviceNet), C (AC power), D (Ethernet 100 Mbps), X (Gigabit Ethernet), S/L (high-current power), and others — the M12 series supports virtually every industrial protocol: discrete sensor signals, analog outputs (4-20mA, 0-10V), fieldbus networks (PROFIBUS, DeviceNet, CANopen), and high-speed Ethernet (PROFINET, EtherNet/IP).
Contacts are machined from brass with selective gold plating, maintaining contact resistance below 3mΩ across hundreds of mating cycles. Reunion manufactures the M12 series through a vertically integrated process, controlling every step from precision machining and injection molding through automated assembly and 100% electrical testing. Available in unshielded and 360° shielded versions, with panel-mount connectors offered in solder, dip-solder, crimp, or flying-lead terminations, the M12 series adapts to diverse equipment designs. For engineers designing factory automation, process control, or transportation systems, this connector provides a reliable, standardized, and cost-effective interconnect solution.
| Parameter | A-code | B-code | C-code | D-code | X-code | S-code | L-code |
| Primary Application | Sensors, IO-Link | PROFIBUS, DeviceNet | AC power | Ethernet 100 Mbps | Gigabit Ethernet | AC power, servo | DC power |
| Pin Count | 2-17 | 4-5 | 3-6 | 4 | 8 | 2-4 | 4 |
| Current Rating | 1.5-4A | 4A | 1.5-4A | 4A | 0.5A | 12A | 16A |
| Voltage Rating | 30-250V | 250V | 60-250V | 250V | 50V | 250-630V | 63V |
| Shielding | Optional | Shielded | Optional | Shielded | Shielded | Shielded | Shielded |
| Mating Cycles | ≥100 times | ||||||
| Temperature Range | -25°C ~ +85°C | ||||||
| Protection Rating | IP67 (mated) | ||||||
| Salt Mist | 48 hours | ||||||
- Contact Material: Brass with gold plating
- Insulator Material: PA66
- Contact Resistance: ≤3mΩ
- All materials RoHS compliant
- 100% electrical testing on every unit
| Aspect | Reunion M12 Series | Premium European M12 Brands | Low‑Cost Unbranded M12 |
| Price | Volume‑friendly pricing | 3‑4× higher | Cheaper upfront |
| Gold Plating | Standard | ≥0.2‑0.4µm | Thin or none |
| Coding Options Available | A/B/C/D/X/S/L/K/T/Y/M — all standard | Usually A, B, C, D only | Limited codes |
| Pin Range | 2‑17 — comprehensive | 4‑12 typical | Variable, incomplete |
| IP67 Verification | Batch immersion‑tested | Batch‑tested | Not verified |
| 100% Electrical Testing | Every unit | Sample‑based | Random or none |
| Cable Assembly | In‑house controlled, PUR/PVC options | Often outsourced | Manual, inconsistent |
| Traceability | ERP traceable from resin to finished connector | Yes | None |
| Lead Time | 12‑15 days | 4‑8 weeks | Unpredictable |
| Customization MOQ | Low (100 pieces) | High (500+) | Not offered |
| Technical Support | 24‑hour response from 10‑person engineering team | Good but slower | Limited |
| ISO Certifications | 9001, 14001, 13485 | Usually 9001 | Typically none |
The Reunion advantage: You receive documented quality, full DIN compliance, and verified IP67 sealing across the broadest range of M12 coding options — all from a single factory source, without the premium cost of European brands or the uncertainty of unbranded alternatives.
| Certification | Scope |
| ISO 9001:2015 | Quality management — design, production, and after‑sales service. |
| ISO 14001:2015 | Environmental management — verified waste reduction and sustainable practices. |
| ISO 13485:2016 | Medical device quality management — applicable for M12 used in diagnostic or monitoring equipment. |
| RoHS | Restriction of hazardous substances — compliance with EU Directive. |
Reunion's M12 production operates under statistical process control (SPC). IP67 sealing is verified on every production batch through actual immersion testing (1m, 30 minutes). Test records, material certificates, and inspection reports are retained for each batch.
| Item | Detail |
| Standard Packaging | Anti‑static bags with individual cavity protection; reinforced cartons. |
| Lead Time | Samples: 5‑7 days; Production orders: 12‑15 days; Custom cable assemblies: 15‑20 days. |
| Shipping Methods | Bulk: sea or air freight; Samples: express (DHL, FedEx, TNT, UPS, EMS). |
| Delivery Terms | EXW, FCA, FOB, CIF, CPT — flexible. |
| Warranty | 12 months from shipment against manufacturing defects. |
| Technical Support | Engineering response within 24 hours; installation guides and cross‑reference documentation available. |
| Inventory Programs | Consignment stock and VMI available for long‑term volume contracts. |
Selecting the right M12 coding is essential to ensure proper mating and signal integrity. Use this guide:
| Code | Application | Typical Pin Count | Key Characteristic |
| A-code | Sensors, actuators, IO-Link, DC power | 2-17 | Most common, general-purpose |
| B-code | PROFIBUS, DeviceNet, CANopen | 4-5 | Fieldbus communication |
| C-code | AC power for industrial devices | 3-6 | Higher voltage, AC applications |
| D-code | Industrial Ethernet (100 Mbps) | 4 | PROFINET, EtherNet/IP |
| X-code | Gigabit Ethernet | 8 | CAT6a, 10 Gbps-capable |
| S-code | AC power, servo motors | 2-4 | 12A+, high-current power |
| L-code | DC power distribution | 4 | 16A, high-current DC |
If you are unsure, check the mating port on your device — most sensors use A-code, fieldbus devices use B-code, and Ethernet devices use D-code or X-code. Reunion's engineering team can also identify the correct code from your device part number or panel drawing.
Yes. For example:
- 4-pin A-code: Provides power (L+, L-) and data (C/Q) for IO-Link sensors — eliminating separate power cables.
- 5-pin A-code: Provides power, plus two signal lines or a separate shield.
- 8-pin A-code: Provides power, data, and auxiliary signals for complex multi-function sensors.
- S/L-code with separate A-code: For high-power devices (e.g., servo motors), use S/L-code for power and a separate A-code connector for data/signals.
The M12 connector supports power up to 16A (L-code) and data simultaneously, simplifying sensor and actuator wiring — reducing installation costs and panel space.
To achieve and maintain IP67 sealing, Reunion recommends:
- Torque range: 0.5-0.7Nm for A/B/C/D-coded connectors; 0.8-1.0Nm for S/L-coded power connectors. Hand-tighten first, then apply additional torque with a tool — do not exceed 1.0Nm.
- O-ring inspection: Replace the O-ring if deformation, cracking, or hardening is visible.
- Replacement schedule: Annually for daily washdown applications; every 2-3 years for standard factory-floor environments.
- Cable bend radius: Maintain minimum 5× cable diameter at connector entry.
- Orientation: For washdown applications, orient cable exit downward to prevent liquid pooling near the seal.
Address
West of 2nd and 3rd Floor, Building B, Zhongjing Zhiyun Science Park, No. 606, Fengtang Avenue, Zhancheng Community, Fuhai Street, Bao 'an District, Shenzhen
Tel
