Class A (IO-Link)

Class A IO-Link ports are a type of interface used in industrial automation for communication between IO-Link masters and devices. These ports are known for their flexibility, making them ideal for a wide range of applications. 

IO-Link Class A ports are versatile and suitable for many devices, making them a popular choice in industrial settings.

What Are IO-Link Class A Ports?

Class A IO-Link ports are the standard form for most connections between devices and hubs. The typical Class A IO-Link port offers two-way communication, which permits both signal and data transmission between your sensors or actuators and the master port. 

The advantage of Class A ports lies in their ability to transmit power and signal over a three-wire interface, streamlining installations and curbing the complexity of wiring a setup.

IO-Link Class A vs Class B

When comparing IO-Link Class A to Class B, you need to consider the application and what it demands. 

While IO-Link Class A is well-suited to most scenarios with its simplified wiring approach and solid communication capabilities, Class B should be chosen for specialized applications requiring an uninterrupted power supply. 

It’s not just about the technical specifications. It’s also about aligning the port class with your operational needs.

When to Use IO-Link Class A vs B

The decision to use a Class A or a Class B port depends heavily on individual use cases. Manufacturers who require standard device communication, with reasonable power needs, will find the practicality of IO-Link Class A fitting seamlessly into their operations. Those with demanding power requirements will have to weigh the benefits of adopting Class B configurations, ensuring that their enhanced functionalities are well leveraged.

Understanding whether IO-Link Class A or Class B is suitable for your manufacturing environment is vital. Not only does the proper selection enhance efficiency and reliability, but it also paves the way for future-proofing your operation, making it flexible enough to adopt further advancements in IO-Link technology.

Pins in IO-Link Class A Ports

A more technical yet crucial consideration is the pin configuration in IO-Link Class A ports. These ports usually comprise of three essential pins:

• Pin 1 for the power supply
• Pin 3 for the ground
• Pin 4 for the data signal

In Class A ports, only pins 1, 3, and 4 are significant for IO-Link communication. Pin 2 and Pin 5 can be used for various purposes determined by the manufacturer. This flexibility allows for additional I/O count and, in some cases, high-amperage outputs, which can be used to drive devices like valves. 

CoreTigo’s IO-Link Wireless products support both IO-Link Class A and IO-Link Class B devices. IO-Link Class A products are suitable for use with TigoBridge A1, TigoBridge A2, and TigoHub. Each of these allows converting IO-Link Class A devices into IO-Link Wireless devices, thus enabling new applications.