IO-Link Complete Guide

This section provides an easy-to-understand overview of IO-Link, its features and benefits. You can learn about IO-Link basic knowledge, technical explanations, and precautions from the tabs below.

1. Power Capacity of Connected Devices
2. Cable Length

1. Power Capacity of Connected Devices

The power capacity of IO-Link devices is 0.2 A or less in current consumption due to their specifications.
Therefore, the IO-Link Master also cannot connect to devices that exceed 0.2 A per point.
Since the IO-Link Master can be connected to devices other than IO-Link devices, be sure to check the current consumption of the connected devices.
Particular attention should be paid when connecting to motors and actuators. When connecting to a device that exceeds 0.2 A, it is necessary to take countermeasures such as supplying power from another power source separately. (Port Class B can be connected to high-capacity devices.)
Also note that when connecting multiple devices to the IO-Link master.
Each point can be connected to 0.2 A devices, but there is a specification of up to 2.5 A for 16 devices.
*If 16 0.2 A devices were connected, the result would be 0.2 A x 16 devices = 3.2 A, which exceeds 2.5 A.

Port Class

Port Class A (Type A)・・・
In general, it is compatible with 3-wire cable.
The function of pins 2 and 5 is not defined for this type.

Port Class B (Type B)・・・
In general, it is compatible with 5-wire cable.
Capable of connecting to high-capacity devices, this type has pins 2 and 5, which are primarily assigned to supply voltages.

2. Cable Length

Cable length between PLC and IO-Link Master is Maximum 100 m (network using Ethernet), but cable length between IO-Link Master and IO-Link device is Maximum 20 m.