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English
7XV5655-0BB00
To use the FO interface, DIP switch S2-2 must be set to match the FO idle state of the
communications partner (ON or OFF). DIP switch S2-1 for RS232/485 selection must be
set to RS232. DIP switches S1-1 and S1-2 must be set to OFF (see Fig. 5).
On SIPROTEC units, the idle state is preset to OFF. This is also the as-delivered state of
the Serial Modem.
The 9-way RS232 interface can be used in parallel. If it is not, please cover it with the
red protective cover supplied !
If the FO interface is not used, it must also be covered with the protective covers supplied.
Ethernet Interface (10BaseT)
The Ethernet interface 10BaseT (RJ45) is connected via an Ethernet patch cable (1:1, not
cross-over) directly to the output of a router or switch. The data packed in the TCP/IP
protocol are transmitted to and received from the Ethernet via this interface.
Using the configuration tool on a PC with an Ethernet interface and a cross-over Ethernet
patch cable it is possible to configure the Serial Modem, too.
The configuration tool is included in the scope of supply.
Auxiliary Voltage
The auxiliary voltage V
(AC/DC) and the protective earth conductor (ground) are connected via
aux
three terminals. The wide-range power supply unit has reverse polarity protection (terminals L+ and
L- could be swapped in AC and DC operation) and can be used in substations with substation
batteries, for example. It features double or reinforced insulation and backs up the auxiliary voltage
for >50ms.
DR Contact
The isolated DR contact (device run) is for signalling faulty device states. The device
internally monitors the supply voltage and proper functioning of the device.
The contact is open in the normal operating state and closes on faults and auxiliary voltage
failure. It is connected via two terminals (DR 1+2).
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C53000-G1176-C175-2
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