SEW MOVIDRIVE MDX60B, User Manual

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Manual – MOVIDRIVE® MDX60B/61B Communication and Fieldbus Unit Profile
5
Connecting and installing CAN
CAN Interfaces of MOVIDRIVE® B
5.1.2 Shielding and routing cables
Correct shielding of the bus cable attenuates electrical interference that can 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.
• Apply the shielding of the bus cable on both ends over a large area.
• 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.
TIPS
• Do not operate both CAN interfaces with 1000 kBaud to limit the interrupt load for
MOVIDRIVE
®
B.
If a CAN interface is operated wtih 1000, the other CAN interface must be set to
125 kBaud.
• The option cards DCS..B use the CAN 2 interface. The baud rate of the CAN 2
interface is set to 500 kBaud by default.
• MOVIDRIVE
®
compact MCH4_A units must not be combined with other
MOVIDRIVE
®
B units in the CAN network if the baud rate is set to 1000 kBaud.
NOTICE
Swapping the CAN connections.
CAN transceiver in MOVIDRIVE
®
B or on DFC11B option might be destroyed.
Make sure the CAN interfaces are connected correctly.
CAUTION
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 in accordance with relevant VDE reg-
ulations in such a case.