Rockwell Automation Publication 2198-UM002E-EN-P - February 2018
319
Size Multi-axis Shared-bus Configurations
Appendix C
General Sizing Guidelines
These limitations apply to Kinetix 5700 servo drive systems supplied by a
single 2198-P
xxx
or multiple 2198-P208 DC-bus power supplies:
• The sum of the inverter motor-power cable lengths for all inverters on
the same DC bus-sharing group must not exceed 400 m (1312 ft) to
comply with CE requirements.
• The total system capacitance limit is based on the power supply catalog
number. DC-bus groups must not exceed the limits defined in
• No more than three 2198-P208 DC-bus power supplies can be used to
increase the converter power or to increase the total system capacitance.
• If using the 24V DC shared-bus connection system to distribute control
input power to a cluster of drive modules, current from the 24V power
supply must not exceed 52 A.
• The Kinetix 5700 system cannot have more than two drive clusters in a
single DC-bus group.
Refer the 8720MC Regenerative Power Supply Installation Manual,
publication
, for additional system sizing limitations.
System Sizing Guidelines
You begin the process by selecting the motor for your application and sizing the
drive and power supply combinations. Next, calculate whether the motor
power cable length, total system capacitance, and 24V current demand are
within specifications.
For systems with an iTRAK power supply, the iTRAK system requirements
must be calculated to determine the following:
• Kinetix 5700 DC-bus loading (DC-bus motoring and bus-regulation
power requirements)
• 2198-P
xxx
power supply for supporting the iTRAK power supplies
• 24V current demand
• Number of iTRAK power supplies required
• Resulting net converter power and bus-regulator capacity
See the iTRAK System User Manual, publication
for more
information.
For iTRAK hardware and iTRAK power supplies, skip ahead to the