Product Description
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Product Description
3.1
Intended Use
The optical data coupler serves as an optical link between two Ethernet devices;
ideally, one of these devices is mobile. The opening angle is optimized for
operations in high-rack storage.
Devices in industrial Ethernet networks (e.g., with PROFINET, EtherNet/IP, and
other Ethernet protocol designs) can be connected to the optical data coupler.
The physical transfer takes place with 100 MBit/s full duplex. The connection to
multiple devices requires network switches that have been certified for use with
the bus system in question. All layer 2 telegrams (IEEE 802.3 Clause 25) are
physically transported. Since no telegrams are saved, the transfer takes place
without any delay.
Devices with a transfer rate of 10 MBit/s can be connected via a network switch.
The optical data coupler uses a semiconductor laser as an optical emitter. The
dilation of the light beam and the use of return map blocks guarantee that the
devices are harmless in accordance with laser class 1M. The emitted beam must
not be viewed with telescopes or binoculars from distances of less than 20 m. At
greater distances, the limit values for laser class 1M are not exceeded, even when
viewed through a telescope with a 50 mm aperture.
Optical data transfer in real time
The optical data coupler offers robust optical data transfer in real time for industrial
Ethernet systems such as PROFINET IRT and EtherCAT.
The automatic runtime compensation allows a consistent throughput time for
synchronous, jitter-free switching operations and control processes at both ends
of the transmission path. This takes place over any distance and with any driving
dynamics.
The connection status is quickly recognized and transmitted across all segments
of the data transfer. The optical data coupler therefore helps the network's
redundancy mechanisms to immediately bridge faulty paths with unique
localization and enables a high level of availability and clear diagnosis.
Compatibility with LS680, LS682
Due to technical changes for the runtime compensation and the signaling of the
link status, mixed operation of LS684 with LS680 receivers or LS682 receivers is
not possible.
If mixed operation is attempted, the bar graph display shows a reception level.
However, Ethernet data cannot be exchanged.
LS684*
