IEEE 1588 external synchronisation interface EL6688
Status LEDs
Ethernet port 1
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EL6688 | IEEE 1588 external synchronisation interface

The EL6688 EtherCAT Terminal presents itself as a device in the IEEE 1588 synchronisation system with support for PTPv1 (IEEE 1588-2002) and PTPv2 (IEEE 1588-2008) based on Ethernet.

On the one hand, the EL6688 is an IEEE 1588 clock (master or slave) that is synchronised based on the protocol precision. On the other hand, it is synchronised as an EtherCAT Terminal by the distributed clock system. The following operating modes can be selected via the TwinCAT System Manager: "SlaveOnly", "MasterOnly" and "Best Master Clock". In this way, a consistent timebase can be created across applications for any number of spatially separated EtherCAT systems and machine sections, e.g. for application with axes or measurement technology. The compact EtherCAT Terminal enables flexible deployment depending on the application requirements.

Technical data EL6688
Number of Ethernet ports 1
Bus system Ethernet (IEEE 802.3)
Ethernet interface 10BASE-T/100BASE-TX Ethernet with 1 x RJ45
Data transfer rates 10/100 Mbit/s, IEEE 802.3u auto-negotiation, half or full duplex at 10 and 100 Mbit/s possible, automatic settings
Cable length up to 100 m twisted pair
Hardware diagnosis status LEDs
Power supply via the E-bus
Distributed clocks yes
Electrical isolation 500 V (E-bus/Ethernet)
Protocol PTPv1 (IEEE 1588-2002), PTPv2 (IEEE 1588-2008)
Configuration no
Current consumption power contacts
Current consumption E-bus typ. 310 mA
Special features usable in TwinCAT as a reference clock
Weight approx. 75 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Approvals CE, UL, Ex
subsystem For further subsystem products please see the system overview.