Rockwell Automation Publication 2198-UM002L-EN-P - October 2021 375
Appendix C Size Multi-axis Shared-bus Configurations
General Sizing Guidelines
These limitations apply to Kinetix 5700 servo drive systems supplied by a single
2198-Pxxx or multiple 2198-P208 DC-bus power supplies, or 2198-RPxxx
regenerative bus supplies:
• The sum of the inverter motor-power cable lengths for all inverters on
the same DC bus-sharing group must not exceed 1200 m (3937 ft) to
comply with CE requirements when used with 2198-DBRxx-F line filters.
2198-DBxx-F line filters have a total motor cable length limit of 400 m
(1312 ft). See Drive to Motor Cable Lengths
on page 150 for additional
motor power cable-length limitations.
• The total system capacitance limit is based on the power supply catalog
number. DC-bus groups must not exceed the limits as defined in
Table 182
.
• No more than three 2198-P208 DC-bus power supplies can be used to
increase the converter power.
• 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 40 A.
• The Kinetix 5700 system can have multiple drive clusters in a single DC-
bus group. See DC Bus Cluster-to-Cluster Cable Lengths
on page 147 for
more information on extended clusters.
Refer the 8720MC Regenerative Power Supply Installation Manual, publication
8720MC-RM001
, 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-Pxxx power supply for providing DC-bus to the iTRAK power
supplies
• 24V current demand
• Number of iTRAK power supplies required
• Resulting net converter power and bus-regulator capacity
See iTRAK System with TriMax Bearings User Manual, publication
2198T-UM002
, or iTRAK 5730 System User Manual, publication 2198T-UM003.
For iTRAK hardware and iTRAK power supplies, proceed to the Calculate
System and External-bus Capacitance on page 376.
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