DD8RP 9 / 15 rev. 1.0
Device Details
LINK Ports
Four independent LINK ports provide receptacles for SFP optical transceivers. Each LINK can be equipped with
two SFPs with two LC-type connectors. The advantage of this concept is obvious. Each port holds the SFP
needed in the particular application. They can be changed without opening the device. The multimode full duplex
SFP transceiver (850nm) or monomode full duplex SFP transceiver (1300nm) can be purchased with the device
or can be ordered later.
The specification of the ports as A or B serves only for orientation. A dual LC cable with an input and output signal
connected to port A will be transferred to port B, either refreshed by the repeater or refreshed and converted to
another media type.
The DD8RP is not limited to be used in Optocore networks. It can operate in all sorts of networks no matter which
protocol is the base of the data transmission. The four LINKS are functioning totally independent; so one LINK
can serve in an Optocore network, the next one in a 1 Gbit-Ethernet and the others in completely different
networks.
Power Supply
The device is equipped with two power inputs and power supply units. If one power supply fails, due to
malfunction of the feeding power line or the power supply unit itself, the device will automatically switch over to
the other power supply unit.
One power supply unit operates with mains voltage of 100 ... 240 V and frequency of 50 … 60 Hz. Thus the
device can be used throughout the world without any adjustments or transformers.
The power supply unit is 400 V
AC
tolerant and protected against high current. The OVP (Over Voltage Protection)
LED on the front will indicate over voltage at > 300 V, simultaneously suppressing the normal function of the
device. When the OVP LED is lit, immediately disconnect the device from the power line to prevent any damage
to the device. The power input has a fuse, replaceable without opening the device.
Never bypass the fuse and only use the specified type.
Be aware that the switched-mode power supply operates with high voltages! Coming into contact with it
can lead to considerable electric shocks that may result in death! To prevent electric shocks do not
remove any covers!
The second power supply operates with 9-15 V / 1 A AC or DC. The low voltage can be provided by a wide range
of alternatives such as battery packs, UPSs (Uninterruptible Power Supply) or standard AC adapters. Specially in
temporary outdoor applications with long distances between devices, e.g. at a race course or a road race, this
simplifies the power supply. No generator or long power cables are necessary. The unit is specially designed for
low power consumption. A battery pack with a sufficient capacity can easily supply the required power.
Connectors and Cables
Optical Connection
The type of the optical fiber cables depends on the optical transceivers. The connectors are LC-type.
RS232-Connection
Shielded, standard 1-modem cable is sufficient for the RS232 port.
USB-Connection
For the USB-port use a standard PC/device cable.
Mains-Connection
For the power supply 1 standard power cords with IEC C13 socket can be used.
12V-Connector
For the power supply 2 a cable with 4 pole female XLR connector can be used.