With the switches of the "Tree" series from Murrelektronik Ethernet devices can be compactly networked. The new Tree67 variants are equipped with four or eight M12 ports and are suitable for use in harsh industrial environments. With them decentralized machine concepts in a star-shaped structure can be realized economically.
The IP67 switches are insensitive to EMC effects. They withstand vibrations. In addition, they are suitable for use in a very wide temperature range: from -25 ° to + 60 ° C they work without restriction. The four or eight M12 ports (d-coded) support transfer rates of 10 or 100 Mbps. Which rate is currently required, recognize the devices via the Autonegotiation function independently. VLAN-tagged Profinet frames enjoy priority, they are automatically prioritized in traffic.
The switches require very little energy for self-sufficiency. It is especially handy if a fieldbus module (for example MVK Metall or Impact67) with a free M12 port (a-coded) is located nearby. Then Tree67 can be connected with a standard sensor cable. Incidentally, a short-circuit of neighboring sensors does not affect this solution for power supply, as the ports on Murrelektronik fieldbus modules switch off selectively in case of emergency.