Westermo MD-63 Profibus - Manual (Page 2)

8 6071-2071
Functional description MD-63 Profibus
MD-63 Profibus is developed for RS-485 point-to-point communication and conversion
between RS-485 and fibre. The unit is specially developed for Profibus and uses a
Profibus standard 9-position D-sub for connection with RS-485. Possibility to connect
to a 5-position screw block is also available.
The fibre optic interface uses ST-connectors and both multi mode and single mode
fibre versions are available. The maximum transmission distance is calculated from the
available power budget of the modems and the attenuation of the cable, splice joints and
connectors. Distances up to 25 km can be reached using single mode fibres. The fibre
optical cable is completely immune to external interference, which makes it ideal for
harsh enviroments.
The modem consists of one F/O channel with separate transmitter and receiver.
On the front of the unit there are also three LED’s indicating the data transmission
on the channel.
MD-63 Profibus can be used at all standard Profibus transmission speeds up to 1.5 Mbit/s
and all operating parameters are set-up via DIP switches easily assessable under the lid
on the top of each unit.
MD-63 Profibus is available in low (LV) and highvoltage (HV) versions. MD-63LV
supports power supplies 12–45V AC ± 5% and 12-55V DC ± 5%. MD-63HV
supports power supplies 95–240V AC ± 5% and 110–240V DC ± 5%