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Beckhoff Automation (Pty) Ltd
Unit 8, Boskruin Business Park
Bosbok Road
Randpark Ridge
Gauteng
South Africa
Tel: +27 (011) 792 3374
Fax: +27 (011) 792 5453
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EtherCAT junction for PoE sensors
Tuesday, November 25, 2008: Beckhoff Automation (Pty) Ltd
Power over EtherCAT
The EtherCAT Terminal system from Beckhoff takes optimum advantage of the technological features of EtherCAT. To this end, this I/O system has been complemented with an additional terminal: the EK1132 EtherCAT junction that supports Power over EtherCAT, based on the IEEE standard 802.3af. A standard EtherCAT/Ethernet cable is used for the fieldbus signal and the power supply.
The EK1132 EtherCAT junction is particularly suitable for sensors such as shaft encoders or length measuring devices that can now be connected via a single cable. The sensor supply voltage of 48 V is generated in the junction from the 24 V voltage used as the industry standard. The maximum current input of the terminal devices is 350 mA. The signal and energy transfer takes places on the same wire so four-wire cables can be used. The Power over EtherCAT sensors are connected via a 4-pin connector, e.g. M12. The maximum cable length is 100 m.
An intelligent power distribution system detects which consumer belongs to which performance class and distributes the total available power (15.4 W) to the connected devices accordingly. Like the 2-port EK1122 EtherCAT junction, the EK1132 also enables configuration of EtherCAT star topologies. Through the Beckhoff TwinCAT automation suite and other suitable EtherCAT masters the EK1132 also supports coupling and uncoupling of EtherCAT devices during operation (Hot Connect).
