Introduction

IO-Link master

The IO-Link masters EJ6224 and EJ6224-0090 enable the connection of up to four IO-Link devices. IO-Link devices are actuators, sensors or a combination of both. The connection between the EtherCAT plug-in module and the device is a point-to-point connection. The EJ6224-xxxx EtherCAT plug-in modules are parameterized via the EtherCAT master. IO-Link is designed as an intelligent link between the fieldbus level and the sensor, wherein parameterization information can be exchanged bidirectionally via the IO-Link connection.

The parameterization of the IO-Link devices with service data is carried out from TwinCAT via ADS or very conveniently via the integrated IO-Link commissioning tool. The tool enables automatic scanning of the IO-Link devices, convenient sensor parameter processing and an integrated online search for sensor description files.

The EJ6224-0090 EtherCAT plug-in module supports the full range of functions of the EJ6224 as well as TwinSAFE SC technology (TwinSAFE Single Channel).

The TwinSAFE SC (Single Channel) technology enables the use of standard signals for safety tasks in any networks of fieldbuses. The standard functionalities and features of the I/Os are retained. The data of the TwinSAFE SC I/Os are routed to the TwinSAFE logic and processed there in a multichannel safety-related manner. In the Safety Logic the data originating from different sources are analyzed, checked for plausibility and submitted to a ‘voting’. Certified function blocks such as Scale, Compare/Voting (1oo2, 2oo3, 3oo5), Limit etc. are used for this purpose. For safety reasons, however, at least one of the data sources must be a TwinSAFE SC component. The other data can come from other standard I/Os, drive controllers or measuring transducers.

With the aid of the TwinSAFE SC technology it is typically possible to achieve a safety level equivalent to PL d/Cat. 3 in accordance with EN ISO 13849-1 or SIL 2 in accordance with EN 62061.