Westermo FD-20 - Manual (Page 5)

5 6630-2220
3. Introduction
The FD-20 is designed to provide a method of transferring PROFIBUS I/O data over
serial data links.
The FD-20 contains a PROFIBUS master that can control a network of PROFIBUS DP
Slaves connected to its fieldbus port.The unit can be easily configured within the limits set
by the serial data rate to transfer input and output data between PROFIBUS networks.
The unit is able to transfer PROFIBUS DP data over leased line, dial up modems,
Ethernet or radio systems.
The FD-20 can be used in conjunction with the FD-10
(which contains a PROFIBUS DP Slave)
All Westermo Fieldbus Adapters use the same protocol to communicate with each other
via the serial interface.
3.1 Field of application
Point to point transfer
The continuous transfer of defined PROFIBUS I/O data between one FD-10 P
(Fieldbus adapter PROFIBUS DP Slave) and one FD-20
(Fieldbus adapter PROFIBUS DP Master).
*PSTN= Public Switch Telephone Network
FD-10 P
PR
OFIBUS DP
PR
OFIBUS DP
FD-20
PROFIBUS DP Master
Modem
(e.g PSTN*, Radio)
PROFIBUS DP Master
PROFIBUS DP Slave
Modem
(e.g PSTN*, Radio)