M12 Connector Coding Pinout Wiring Color Code and Categories Introduction
If you want to get a safe, reliable, sealed and waterproof power and signal connection between your actuators, sensors and industrial devices, robots, automation equipment, you’d better choose IP67 circular waterproof m12 connectors and cable assemblies.
How to choose suitable m12 connectors and cable assemblies for your applications?
How to identify m12 circular connector coding?
How to connect different types of color of core wire to correct pins / positions of m12 male or female connectors?
How to choose a suitable m12 connector and cable assembly to be installed into your devices?
In order to help wide readers solve the upper questions and design and assemble power and signal connection systems for concrete industry applications, I’ll introduce them by following different subjects:
I. M12 Connector Coding
There are following male and female A-Coded, B-coded, C-coded, D-coded, X-coded, S-coded, T-coded, L-coded, P-coded m12 connectors.
You may identify these coding types of m12 series by below contact layout diagrams:
1. M12 A-coding Connector 3pins 4pins 5pins 8pins 12pins 17pins male pin layout diagram (front view)
Application: m12 A-coding male connector is used for actuator-sensor plug connections for DeviceNet, IO link and Profibus.
2. M12 A-coding Connector 3contacts 4contacts 5contacts 8contacts 12contacts 17contacts female contacts layout diagram (front view)
Application: m12 A-coding female connector is used for actuator-sensor plug connections for DeviceNet, IO link and Profibus.
3. M12 B-coding connector 5 pins male pin and female contact layout diagram:
Applications: Fieldbus connections for Profibus and Interbus
4. m12 C-coding connector 3pin 4pin 5pin 6pin connector pin and contact layout diagram
5. M12 D-coding Connector 4 pole male pin and 4 pos female contact layout diagram:
Applications: Industrial Ethernet, Profinet, Ethernet/IP and EtherCat
6. M12 X-coding 8 pole male pin and 8 positions female contacts layout faceview:
Applications: Cat6A, high-speed 10Gbit rugged industrial Ethernet.
7. M12 S-coding connector 2+PE, 3+PE male and female pin layout faceview
Applications: Motor, Frequency-convertors, motor operated switches, PSUs for Power, 620V, 12A
8. M12 T-coding connector 4 pole male and female contact arrangement
Applications: Fieldbus comp, passive distribution boxes, motors, PSUs for Power, 63V, 12A
9. M12 L-coding Connector male and female 4pin + PE contact layout diagram
Application: L-coded M12 Power Connector with max 16A current comes true the change from big Power vs small Size alternative to both big Power and small Size. It can be used in the PROFINET application on the condition that needing big power supply and small space. Using L-code M12 connectors means no more difficult choices when designing smaller, more powerful PROFINET system components.
10. M12 P-coding Connector 5 pin male and female contact arranglement.
II. M12 Connector Pinout
1. m12 sensor connector pinout
M12 a-code 3 pin 4 pin 5 pin male and female sensor connector pinout
M12 a-coded 8 pin 12 pole male and female sensor connector pinout
2. M12 male connector pinout
M12 A-coding B-coding D-coding 3 4 5 8 12 pin male connector pinout
3. M12 female connector pinout
M12 A-coded B-coded D-coded 3 4 5 8 12 pole pos female connector pinout
4. m12 4 pin connector pinout
5. m12 5 pin connector pinout
6. m12 8 pin connector pinout
7. m12 12 pin connector pinout
8. m12 17 pin connector pinout
9. m12 Ethernet connector pinout
10. ProfiBus m12 connector pinout
ProfiBUs M12 2Pin 3Pin 4Pin B-Coding Connector Pinout
M12 4 Pin 5 Pin B-Coding ProfiBus Connector Pinout
11. ProfiNet m12 connector pinout
12. DeviceNet m12 connector pinout
13. m12 power connector pinout
M12 S-Coding K-Coding, T-coding L-Coding Power Connector Pinout
III. M12 Connector Wiring Color Code
1. M12 Connector Color Code
2. M12 Cable Color Code
3. M12 Wire Color Code
4. M12 Connector 4 Pin Color Code
5. M12 Connector 5 Pin Color Code
6. M12 8 Pin Connector Color Code & 12 Pin Connector Color Code
7. M12 17 Pin Connector Wire Color Code
8. M12 CANopen / Devicenet Connector Wire Color Code
9. M12 Ethernet Connector Cable Color Code
10. M12 INTERBUS Connector Wire Color Code
11. M12 Ethernet Connector Wire Colour Code
12. M12 Profinet EhterCAT Connector Wire Color Code
13. M12 A-Coded 8-Pole Cat5E Ethernet Connector Wire Color Code
14. M12 X-Coded 8-Pole Cat6E Ethernet and Varan Connector Wire Color Code
15. M12 A-Coded 4-Pole SFC-Interface and CC-Link Connector Wire Color Code
16. M12 S-Coded 2+PE and 3+PE Pole Connector Wire Color Code
17. M12 T-coded 4-Pin Power Connector Wire Color Code
18. M12 L-coded 4+PE Contacts Power Connector Wire Color Code
IV. M12 Connector Categories
1.M12 Field Wireable Connector
2.M12 Panel Mount Connector
3.M12 PCB Connector
4.M12 X-coded Connector
5.M12 D-Coded Connector
6. M12 Molding type Connector and cable assemblies
M12 Connector Pinout: Understanding Interconnect Needs
Connectors carry signals and information between boards and components within a larger system. The M12 connector and the related M12/M8 connector system have become favorites among industrial engineers, who often look for rugged connector and cabling systems.
M12 connectors are common general-purpose connectors found on many cable types to support protocols like Process Field Bus (Profibus). However, there is no single M12 connector; there are many possible M12 connector pinouts that can be used in different systems.
M12 connectors are commonly used to interface between PLCs, electromechanical systems, and other electrical systems on the factory floor. When you’re designing around this connector system, you’ll need an M12 connector pinout to interface with signal ports on the Rx/Tx sides of a connection.
In this article, we will delve a little deeper into M12 connectors—what they are and where they should be used.
What are M12 Connectors?
The M12 connector is a circular keyed connector with a 12-mm locking thread. They provide a rugged, flexible option for connecting a wide variety of equipment. The M12 connector was originally designed for use in corrosive environments where reliability is key, although M12 connectors can also be used in higher-end factory environments requiring high data transfer rates. Primary uses of this connector are in industrial automation, including actuators, industrial Ethernet, sensors, Profibus, and Fieldbus.
Unlike some other connector types, such as USB, the M12 connector is meant to be non-removable. M12 connectors can be securely attached by soldering, securing with vertical through holes, or right-angle connectors. They are built to withstand environmental stresses and to be waterproof, making them ideal for heavy-duty applications. Their shells are stainless steel or plated with brass and nickel to withstand rust and corrosion. In addition, they function at a wide range of temperatures, from -40 to 85 °C. This covers conditions ranging from high temperatures in many factories and extends into temperatures well below freezing. In general, M12 connectors for flexible use have lower temperature tolerances than those connectors that are rigid once installed.
M12 Connector Codes
M12 connectors are coded based on whether they need to carry data or power.
For data applications, there are 5 major types of M12 connectors coded with the labels A, B, C, D, or X. These connectors are available with 2, 3, 4, 5, 6, 8, 12, or 17 pins, depending on the number of signals, type of signals, type of interface involved in the connection, and the connector code. Note that each coded connector has its own key format, and different connector styles have different possible numbers of pins. The common key styles for the 5 major M12 connector codes are shown below.
There are also 5 additional M12 connector codes for AC power, DC power, and general-purpose use in different protocols. These are S-coded M12 connectors for AC power, which will eventually replace C-coded power parts. T-coded M12 connectors are designed for DC power and will eventually replace the use of A-coded connectors for supplying DC power. Finally, the K-coded M12 connector is under development for AC power, while the L-coded connector is used for DC power in Profinet buses. The table below summarizes the various M12 connector codes and their applications.
|A||Sensors, DC power, gigabit Ethernet|
|D||Up to 100 Mbit Ethernet (Standard TIA 568-B)|
|X||Up to 10 Gbit Ethernet (Standard TIA-568-C.2)|
|S and K||AC power|
|T and L||DC power|
M12 Connector Pinout
The specific M12 connector pinout for different coding types only depends on the number of pins. The image below shows the pin arrangement for an A-coded connector, but similar pinouts are shown for other connector codes. For example, a C-coded M12 connector can have 6 pins, while B-coded has 5 pins, and D-coded has 4 pins. The top key position shown below also matches the top key position for other connector styles. In addition, the pin styles shown below are used across connector styles.
Selecting the Right M12 Connector
If you need to select an M12 connector, it’s best to simply follow the recommendations on your equipment datasheet. Look at the absolute maximum power and temperature ratings your equipment will run at and select a cable with a suitable safety factor above these values. When you need to search by specification, it helps to use a great electronics search engine to find your components and connectors.
How are M12 Connectors Related to M8 Connectors?
M8 connectors are specifically used in industrial automated systems, linking sensors, actuators, and switches. M12 connectors can fill these roles, but they are also useful in measurement, food and beverage, and robotics applications. This expanded use is partially because M12 connectors can remain functional while submerged, and M8 connectors cannot.
The technology for both connector types began in 1982 with a ⅞ inch connector that could be secured with a spinning nut. M12 connectors came first, followed by M8 connectors in 1989. Their names don’t reflect a series of incremental advancements, as one might assume based on the numbers. They are named for the thread on their coupling nuts—12 mm for the M12 and 8 mm for the M8. From this perspective, the connectors reflect the decades-long trend toward making technology smaller. However, it also emphasizes the fact that making technology smaller doesn’t necessarily make larger technologies obsolete, and different varieties of similar technologies can be of great use.
M8 and M12 connectors are vital to compact communication systems. M12 connectors and cables require conformance with more standards than M8 variants since they have broader applications. The flexibility of M12 connectors even gives them the ability to connect directly to PCB headers, if necessary. Connecting to a PCB header, however, could make the underlying board vulnerable to physical or chemical damage without appropriate protective measures.
Whether you need an M8 or M12 connector pinout, Ultra Librarian provides datasheets and 3D models for a range of commercially available connectors. Designers can also access prices, distributor inventory, and technical specs for a range of electronic components and connectors. You will have access to verified CAD models directly from manufacturers, which can be imported into popular ECAD applications. You will also have access to sourcing information from worldwide distributors.
Working with Ultra Librarian takes the guesswork out of preparing your next product and puts your ideas on the road to success. Register today for free.
New automation products hit the market every day and each device requires the correct cable to operate. Even in standard cables sizes, there are a variety of connector types that correspond with different applications.
When choosing a cable, it is essential to choose the correct size, length, number of connectors, pinout, and codes for your application. This post will review cable codes, which signify different capabilities and uses for a cable. Cables that are coded differently will have different specifications and electrical features, corresponding to their intended uses. To distinguish between the different styles of cable, each connector has a different keyway, as shown in Figure 1. This is to prevent a cable from being used in an incorrect application.
There are a wide variety of cable codings used for different purposes. Below are the five most common M12 cable codes and their uses. They are as follows:
- A-coded connectors are the most common style of connector. These are used for sensors, actuators, motors, and most other standard devices. A-coded connectors can vary in its number of pins, anywhere between two pins and 12 pins.
- B-coded connectors are mostly used in network cables for fieldbus connections. Most notably, this includes systems that operate with Profibus. B-coded connectors typically have between three and five pins.
- C-coded connectors are less common than the others. These connectors are primarily used with AC sensors and actuators. They also have a dual keyway for added security, ensuring that this connector will not be accidentally used in the place of another cable. C-coded connectors have between three and six pins.
- D-coded connectors are typically used in network cables for Ethernet and ProfiNet systems. D-coded connectors transfer data up to 100 Mb. These connectors typically provide three to five pins.
- X-coded connectors are a more recent advancement of the cables. They are growing in popularity due to their ability to transfer large amounts of data at high speeds. X-coded cables transfer data up to 1 Gb. These are ideal for high-speed data transfer in industrial applications. While the other coded cables typically vary in number of connectors, X-coded cables will always have eight pins.
Nick Lanza has experience and knowledge of the industrial automation industry with Balluff. With his product and industry knowledge, he is sharing his passion for automation with Automation Insights.
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