Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual - Manual (Page 69)

5. The input and output line of the 8720MC-RPS units must be
separated from the output line of the inverter unit as far as
possible.
6. Wiring of the control signal must be terminated within the
control cabinet. Should the control cable be needed to extend
out of the control cabinet, it is recommended to use shielded
cables. When ferrite cores are used, install them possibly to the
side of the 8720MC-RPS units. The following are the ferrite
cores for the control cables recommended.
ZCAT2032-0930 (Inside diameter 9 +/- 1mm) : TDK
ZCAT2035-1330 (Inside diameter 13 +/- 1mm) : TDK
7. For notes on wiring to the other equipment and motors to be
connected with the 8720MC-RPS, refer to the manuals of
relevant equipment.
4-31 Wiring