Westermo ODW-610-F2 - Manual (Page 7)

7 6651-22611
Functional description
Internal Electronics
COM
COM
+VA
O
V
P +VB
C
NO
NC
STATUS
POWER
LED’s
O
V
P
O
C
P
RxD/TxD - P
RxD/TxD - N
SHIELD
PROFIBUS DP
CH 1
SFP
Fibre transceiver
TX
RX
CH 2
SFP
Fibre transceiver
TX
RX
Switches
OVP Over Voltage Protection
OCP Over Current Protection
Converter PROFIBUS DP – optical fibre
ODW-610-F2 is a fibre optic modem that converts between electrical PROFIBUS DP and
a fibre optical link.
Repeater – optical fibre links
ODW-610-F2 is a fibre optic repeater that repeats received data from one fibre link out
to the other link. This is useful e.g. for long distance communication, where electromag-
netic interference may occur or when isolation of the electrical network is needed. The
maximum optical fibre distance depends on selected fibre transceiver and fibre type.
Data rate up to 12 Mbit/s
ODW-610-F2 converts PROFIBUS DP data using data rates from 9 600 bit/s up to
12 Mbit/s. Retiming of the PROFIBUS DP data ensures that the correct signal form is
transmitted from the ODW-610-F2 converter.
Automatic data rate detection
The PROFIBUS data rate is set automatically as soon as the ODW-610-F2 receives a
correct data frame, whether data is received from PROFIBUS DP or the fibre optic link.
The detected data rate remains until a number of consecutive faulty received frames have
been detected or no further frames are detected within the timeout period. The time-
out period is set by switches, with the default setting of one faulty frame or 65 535 tbit
without any received frame.