The basics of device circuit breakers | Communication
5
Communication
The level of automation required is increasing year on year in many branches of industry . This brings with it a rising demand for communication and networking of components , including in the area of overcurrent protection .
Device circuit breakers connected to communication interfaces provide tremendous added value in the industry . The devices can be accessed remotely , making it possible to monitor and adjust the system process at any time from anywhere .
5.1 System transparency
Connecting to a communication interface gives you the option of energizing or de-energizing individual channels based on the process . However , the nominal current can also be conveniently adjusted . Processes can be depicted transparently right up to the load with the aid of a wide range of monitoring functions . This makes it possible to detect faults early and even prevent them . The ability to access the system from anywhere in the world by connecting to the right interface can raise service and support to a completely new level . Every value , from the input voltage to the preset nominal current right up to the current actually flowing in the channel can be read out . Moreover , it is possible to remotely secure individual channels or the entire circuit breaker against outside tampering . This can be done by locking in the nominal current setting or locking the entire device operation . IO-Link is one option for this kind of interface .
5.2 IO-Link
The first version of the IO-Link communication system was designed only to connect more intelligent sensors and actuators . The system was taken from the standard IEC 61131-9 from the description “ Single-drop digital communication interface for small sensors and actuators ( SDCI )”.
In the meantime , this communication protocol is also being incorporated into devices such as power supplies or circuit breakers . One IO-Link master and one IO-Link device are required to set up IO-Link communication . The connection between these two devices is point-to-point .
One IO-Link master can have multiple IO-Link ports . One IO-Link device each can be connected per port ( Fig . 22 ).
In its default setting , IO-Link uses 2 bytes to exchange cyclic process data between the master and the device .
The cycle time at this selected speed of 230 kBaud is 400 μs . Larger frame types are also possible , enabling exchanges of cyclic process data up to 32 bytes . However , this always comes at the expense of the cycle time .
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