DIGIVEX Motion - PROFIBUS
24
PVD 3554 GB 01/2004
3.1.5 Bus cable shielding / EMC precautions
The following precautions should be taken to ensure that the PROFIBUS-DP works correctly,
particularly for data transmission using RS485:
Shielding
The shielding for the PROFIBUS bus cable must be connected in the bus connector. Additional
shielding is given by a collar placed around the bus cable shielding and connected with a wide
contact surface to the protective earth. Be careful not to damage the solid copper core when
baring the ends of the conductors. Also make sure that the shielding for each bus cable is not
only connected to the protective earth at the entrance to the electric cabinet but also in the drive
housing.
RECOMMENDATIONS for installation
The bus cables must be made up of twisted conductors and be shielded. They should be laid
separately to the power cables and spaced 20 cm apart.
The braided shielding and any underlying shielding strapping should be connected at both ends
with a wide contact surface guaranteeing a good electric connection, that is to say, the bus cable
shielding linking two drives should be connected to the housing on each of the drives. The same
applies to the shielding on the bus cable between the PROFIBUS-DP master and the drives.
Power supply and bus cables should only cross one another at right angles.
Equipotential bonding
Differences in potential such as different power supplies between the drives and the PROFIBUS-
DP master must be avoided.
• Use equipotential bonding conductors:
- 16 mm
2
Cu for equipotential bonding cables up to 200 m long
- 25 mm
2
Cu for equipotential bonding cables of over 200 m long
• Equipotential bonding cables must be laid so that the area between the equipotential
bonding conductors and the signal cables is as small as possible.
• Equipotential bonding conductors must be connected up to the earth / PE conductor with
a wide contact surface.
3.2 Connecting for drives setting
3.2.1 Général points
To set a DIGIVEX Motion drive from a PC using PME software, it is necessary to use one of the
following interfaces :
REFERENCE
DESIGNATION
USBPRO or
USBPROx12
USB-PROFIBUS Interface
PCIPRO
CP5611 PCI-PROFIBUS card
PCMCIAPRO
CP5511 PCMCIA – PROFIBUS card
RS232PRO
RS232 interface can communicate with one drive at a time
Caution! It is only possible to use this interface if the drive is not
connected to PROFIBUS network.
(the drive mustn’t be connected to a supervisor or a PLC via PROFIBUS
network).