284
System Manual – MOVIDRIVE® compact Drive Inverters
9
Installation notes for PROFIBUS-DP interface (MC_41A)
Installation
9.2
Installation notes for PROFIBUS-DP interface (MC_41A)
Pin assignment
For connection to the PROFIBUS network, use a 9-pole Sub-D connector in accordance
with IEC 61158 (
→
following figure). The T-bus connection must be made using a plug
with the corresponding configuration.
As a rule, the MOVIDRIVE
®
compact
drive inverter is connected to the PROFIBUS sys-
tem using a shielded twisted-pair cable. Observe the maximum supported transmission
rate when selecting the bus connector.
The twisted-pair cable is connected to the PROFIBUS connector using pins 3
(RxD/TxD-P) and 8 (RxD/TxD-N). Communication takes place via these two contacts.
The RS485 signals RxD/TxD-P and RxD/TxD-N must be connected to the same con-
tacts in all PROFIBUS stations. Otherwise, no communication is possible via the bus
medium. The PROFIBUS interface sends a TTL control signal for a repeater or fiber op-
tic adapter (reference = pin 9) via pin 4 (CNTR-P).
Shielding and
routing bus
cables
The PROFIBUS interface supports RS485 transmission technology and requires the ca-
ble type A to IEC 61158 specified as the physical medium for PROFIBUS. This cable
must be a shielded, twisted-pair cable.
Correct shielding of the bus cable attenuates electrical interference that may occur in
industrial environments. The following measures ensure the best possible shielding:
•
Manually tighten the mounting screws on the connectors, modules, and equipotential
bonding conductors.
•
Use only connectors with a metal housing or a metallized housing.
•
Connect the shielding in the connector over a wide surface area.
•
Apply the shielding of the bus line on both ends.
•
Route signal and bus cables in separate cable ducts. Do not route them parallel to
power cables (motor leads).
•
Use metallic, grounded cable racks in industrial environments.
•
Route the signal cable and the corresponding equipotential bonding close to each
other using the shortest possible route.
•
Avoid using plug connectors to extend bus cables.
•
Route the bus cables closely along existing grounding surfaces.
02893AEN
NOTE
In case of fluctuations in the ground potential, a compensating current may flow via the
bilaterally connected shield that is also connected to the protective earth (PE). Make
sure you supply adequate equipotential bonding according in accordance with relevant
VDE regulations in such a case.
Summary of Contents for MOVIDRIVE compact MCH41A
Page 2: ...SEW EURODRIVE Driving the world...
Page 432: ......
