Description Of Interfaces, Dip Switches And Displays - Siemens 7XV5655-0BA00 Application Instructions

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Description of Interfaces, DIP Switches and Displays

The Serial Hub has the following connectors:
• A switchable RS232/RS485 interface (9-way SubD male connector)
• FO transmitter and receiver port with ST connectors
• 10-Mbit Ethernet connector (10BaseT) for a 10/100 Mbit network
• DIP switches for RS232/RS485 switchover and RS485 termination and for setting the
FO idle state
• AC/DC power supply and protective conductor (PE) connection via 3-way screw
terminal
Communications Interfaces
The RS232/RS485 or FO interfaces are controlled internally by the same processor
interface. The electrical interface is selected via the DIP switches. You can choose between
RS232 or RS485; the FO interface always works parallel with RS232 or RS485 at the
transmitter end and is ORed with RS232/485 at the receiver end, that is, both streams of
receive data are unlocked and are received and evaluated with equal priority. To rule out
data collisions, the connected protection units are addressed selectively by DIGSI®. This is
done via the interface address of the protection units.
Fig. 3: Connectors and DIP switch positions
RS232
Note: The factory settings for all interfaces are 9600 baud / data format 8N1. The settings
are automatically adapted to the terminal device's interface by the application (e.g. DIGSI)
on connection.
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RS232 Interface
The terminal device (protection unit) (e.g. a
SIPROTEC 4 unit) or a device from the
®
SIEMENS accessory program (e.g. a 7XV5300
or 7XV5450 star coupler for operating two or
more SIPROTEC
®
directly to the RS232 port. The data is
exchanged between the protection unit and the
Serial Hub via this interface.
To use the RS232 interface, DIP switch S2-1
must be set to RS232 and DIP switches S1-
1+2 to (RS485 termination) OFF. The DIP
switch for the FO idle state (S2-2) must be OFF
(see Fig. 3).
7XV5655-0BA00
devices) can be connected
C53000-G1176-C174-3