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MD |
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Profibus |
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Galvanic |
Transient |
Balanced |
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Westermo Teleindustri AB • 2001 • REV. B |
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Isolation |
Protection |
Transmission |
Approved |
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Omvandlare Opto – RS-485
Converter Opto – RS-485
Glasfaser Wandler – RS-485
www.westermo.se
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%
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6071-2071 |
Specifications MD-63 Profibus
Transmission |
Asynchronous, full/half duplex or simplex |
Interface 1 |
EIA RS-485 / ITU-T V.11 Profibus standard 9-position |
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D-sub alt. 5-position screw block |
Interface 2 |
Fibre optical 2 ST-connections |
Data rate |
9.6, 19.2, 93.75, 187.5, 500, 1500kbit/s |
Indicators |
PWR, TD, RD, LINK |
Temperature range |
5–50°C ambient temperature |
Humidity |
0–95% RH without condensation |
Dimension |
55x100x128 mm (WxHxD) |
Weight |
0.4 kg |
Mounting |
On 35mm DIN-rail |
Power supply alternatives
Model description |
MD-63HV |
MD-63LV |
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PROFIBUS |
PROFIBUS |
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Power supply |
95–240V AC ± 10% / |
12–45V AC ± 10% / |
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110–240V DC ± 10% |
12–55V DC ± 10% |
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Frequency |
48–62Hz / – |
48–62Hz / – |
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Fuse, F1 |
1A T / 1A T |
1A T / 1A T |
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Wickmann |
Wickmann |
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Power consumption |
40 mA |
3W |
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Overvoltage protection |
430V |
430V |
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Isolation, RMS |
3 750V |
3 750V |
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LEDs for indication on MD-63 Profibus
• PWR: |
Indicates that the unit has power |
• TD: |
Indicates recevied data on Profibus/RS-485 side. |
• RD: |
Indicates transmitting data on Profibus/RS-485 side. |
• LINK: |
Indicates a fibre optic link between the modems. |
6071-2071 |
9 |
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