Introduction to M12 Connectors
M12 connectors are a standard solution in industrial automation due to their robustness and reliability. Used in various applications, including sensors, actuators, and industrial Ethernet, these connectors ensure secure and stable connections in demanding environments.
Coding of M12 Connectors
M12 connectors come in various codings, each suitable for specific applications. The purpose of different codings is to ensure compatibility and prevent incorrect connections, ensuring that only matching connectors can be mated. This is essential for system integrity and preventing equipment damage. Here are the main codings:
- A-Coded:
- Applications: Sensors, actuators, bus devices.
- Number of Pins: 3, 4, 5, 8, 12, 17.
- Voltage / Current: 30 - 250 V / 1.5 - 7.5 A.
- Notes: Versatile, suitable for digital and analog signals.
- B-Coded:
- Applications: PROFIBUS fieldbus systems.
- Number of Pins: 2, 4, 5.
- Voltage / Current: Varies by application.
- Notes: Ideal for industrial automation.
- C-Coded:
- Applications: Low voltage power.
- Number of Pins: 3, 6.
- Voltage / Current: Varies by application.
- Notes: Suitable for power applications.
- D-Coded:
- Applications: Industrial Ethernet.
- Number of Pins: 4.
- Voltage / Current: Up to 100 Mbps.
- Notes: Supports speeds up to 100 Mbps.
- X-Coded:
- Applications: High-speed Ethernet.
- Number of Pins: 8.
- Voltage / Current: Up to 10 Gbps.
- Notes: Ideal for large bandwidths.
- Y-Coded:
- Applications: Combination of data and power.
- Number of Pins: 4 (2 for data and 2 for power), 6, 8.
- Voltage / Current: Varies by application.
- Notes: Combined data and power transmission.
- S-Coded:
- Applications: AC power.
- Number of Pins: 2 + PE, 3 + PE.
- Voltage / Current: 630 V AC / 16 A.
- Notes: High power industrial equipment.
- K-Coded:
- Applications: Three-phase AC power.
- Number of Pins: 4 + PE.
- Voltage / Current: 630 V AC / 12 A.
- Notes: Three-phase systems, high power.
- M-Coded:
- Applications: DC power.
- Number of Pins: 4.
- Voltage / Current: 60 V DC / 8 A.
- Notes: DC motors and controllers.
- L-Coded:
- Applications: DC power for field devices.
- Number of Pins: 4 + FE.
- Voltage / Current: Up to 16 A.
- Notes: Ideal for PROFINET applications requiring high power.
- T-Coded:
- Applications: DC power.
- Number of Pins: 2, 2 + PE, 3 + PE.
- Voltage / Current: 63 V DC / 12 A.
- Notes: Suitable for power distribution in automation.
Applicable Standards for M12 Connectors
M12 connectors must comply with various international standards to ensure quality and compatibility:
- IEC 61076-2-101: Specifies M12 circular connectors with screw-locking for low-voltage applications.
- IEC 61076-2-104: Describes M8 connectors with screw-locking or snap-locking.
- IEC 61076-2-113: Details M12 connectors with screw-locking and power/signal contacts for data transmission.
- DIN EN 45545-2: European standard for fire resistance of materials in railway vehicles.
- EN 50155: Standard for railway applications covering onboard electronics.
- EN 61984:2009: Connectors - Safety requirements and tests.
- IEC 61076-2-111: Specification for power connectors with M12 screw-locking.
Types of M12 Connections
M12 connectors are available in several connection configurations:
- Prewired with PUR or PVC Cable: Offer chemical resistance and flexibility.
- Easy Screw Connection: Quick and secure installation.
- Insulation Displacement Connection (IDC): Quick connection without the need to strip wires.
Variants of M12 Connectors
M12 connectors come in different physical configurations:
- Straight Male/Female: Suitable for linear connections.
- Angled Male/Female: Useful in tight spaces requiring an angle.
- For Printed Circuit Board (PCB): Designed for mounting on circuit boards.
- Bulkhead Connectors: They are used to connect cables through a panel or enclosure, providing a secure and sealed connection. They are commonly used in applications where the connection needs to pass through a barrier while maintaining an environmental seal.
M12 Connector Splitters
M12 connector splitters allow splitting a signal or powering multiple devices from a single source. Common types include:
- Y-Splitters: Split one signal into two.
- T-Splitters: Allow connections in three directions.
- Custom Splitters: Designed for specific applications.
This guide provides a comprehensive overview of M12 connectors, ensuring the selection of the appropriate connectors for each specific application, complying with international standards, and optimizing connectivity in demanding industrial environments.
