M12 circular connector come in various types, differentiated by their coding, pin configuration, and intended application.
Coding Types
Coding prevents mismating and designates the connector's intended use:
A-Coding:
Application: General sensor and actuator connectivity, DC power supply.
Pin Configuration: Commonly 3, 4, 5, 8, or 12 pins.
Example: Connecting proximity sensors, light curtains, and simple signal transmission.
B-Coding:
Application: Profibus, an industrial fieldbus communication standard.
Pin Configuration: Typically 4 or 5 pins.
Example: Used in Profibus DP (Decentralized Peripherals) networks.
C-Coding:
Application: AC power applications.
Pin Configuration: Typically 3 or 6 pins.
Example: Connecting AC sensors and actuators.
D-Coding:
Application: Industrial Ethernet.
Pin Configuration: Usually 4 pins.
Example: Used for Ethernet-based fieldbus systems like PROFINET.
X-Coding:
Application: High-speed data transmission (up to 10 Gbps).
Pin Configuration: 8 pins.
Example: Industrial Ethernet applications requiring high data rates.
P-Coding:
Application: Power supply for field devices.
Pin Configuration: Typically 4 pins.
Example: Providing power to field devices in automation systems.
S-Coding:
Application: AC power supply (up to 630V).
Pin Configuration: Usually 3 or 4 pins.
Example: Powering AC devices like motors and drives.
T-Coding:
Application: DC power supply (up to 63V/12A).
Pin Configuration: Typically 4 pins.
Example: Powering DC devices and low voltage power distribution.
Pin Configurations
The number of pins in an M12 round connector varies based on the coding and application:
3-Pin: Common in A-coding for simple power and signal connections.
4-Pin: Widely used in A-coding and D-coding for sensor connections and Ethernet.
5-Pin: Used in A-coding and B-coding for more complex signal requirements.
8-Pin: Typically found in A-coding and X-coding for data-heavy applications.
12-Pin: Used in specialized applications requiring multiple connections.
Connector Types
Male (Plug): Has pins and is inserted into the female connector.
Female (Receptacle): Has sockets to receive the male connector pins.
Mounting Options
Panel Mount: Fixed onto a panel or bulkhead.
Cable Mount: Attached to a cable, used for inline connections.
PCB Mount: Soldered directly onto a printed circuit board (PCB).
Connection Types
Screw Terminals: Wires are connected using screws.
Crimp Terminals: Wires are crimped to the contacts for secure connections.
Solder Terminals: Wires are soldered to the contacts.
Insulation Displacement Contact (IDC): For quick and reliable connections without stripping the wires.
Environmental Protection
Circular connector m12 often come with IP ratings, such as IP67 or IP68, indicating their resistance to dust and water, making them suitable for harsh industrial environments.
