8
6650-2201
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
Switches
OVP
Over Voltage Protection
OCP
Over Current Protection
Converter PROFIBUS DP – optical fibre
ODW-611 is a fibre optic modem that converts between electrical PROFIBUS DP and
fibre optical link.
Data rate up to 12 Mbit/s
ODW-611 converts PROFIBUS DP data in data rate from 9600 bit/s up to 12 Mbit/s.
Retiming of the PROFIBUS DP data ensures that the correct signal format is transmitted
from the ODW-611 converter.
Automatic data rate detection
The PROFIBUS data rate is set automatically as soon as ODW-611 has identified a cor-
rect data frame, independently of whether data is received from PROFIBUS DP or the
fibre optical link. Detected data rate remains until a number of consecutive faulty
received frames or after a delay without any received frame.This is set by switches, with
default setting of one faulty frame or 65 535 t
Bit
.
Point to point communication via fibre optical network
The electrical PROFIBUS DP network is transferred via a fibre optical network by the
use of two ODW-611 units.This application is useful e.g. for long distance communica-
tion, where electromagnetic interferences may occur or when isolation of the electrical
network is needed.
The maximum optical fibre distance depends on selected fibre transceiver and fibre type.
Distance up to 80 km (50 miles).
Point to point communication, fibre optical connection
POWER
CH 1
COM +VA +VB COM
POWER
CH 1
COM +VA +VB COM
TX
RX
TX
RX
