142 Rockwell Automation Publication 7000-UM202H-EN-P - November 2023
Chapter 3 Control Component Definition and Maintenance
Figure 123 - 300W AC/DC Power Supply (Heatpipe Model)
The UPS is installed in the incoming cabling section, below the LV control
section.
The UPS will maintain control power to all the critical 120VAC loads and an
extra AC/DC power supply that feeds the DC/DC power supply for powering all
the drive control components. The main drive cooling fan, and the AC/DC
power supply that feeds the IGDPS boards are not powered from this UPS.
The UPS uses the AS400 communication protocol, and feeds several status
signals back to the ACB to control responses to various conditions including
low batteries, loss of input power, UPS on bypass, etc.
If you have an external UPS, the firmware will not expect any of the signals
mentioned in the above section, and will not display any information relating
to the UPS status. The firmware will operate in the same manner with respect
to the operation of the drive with an internal or external UPS.
The output of the UPS feeds a 300W AC/DC power supply. This is 20% of the
standard AC/DC power Supply used in the drive because the load represented
by the DC/DC power Supply is much smaller than the load of the IGDPS
boards, and we are able to reduce the size accordingly. We still use the
standard AC/DC power supply to feed the IGDPS boards. The 300W AC/DC
power supply has its AC input monitored by the UPS, and the DC output is
monitored by the ACB board for fault conditions.
There is also a hold-up capacitor on the output of the 300W AC/DC power
supply to maintain the 56VDC
(a)
in the event of a failure of the power supply.
300W AC/DC
Power Supply
Hold-up Capacitor
Holding Bracket
UPS
EMI Filter
(a) 56V DC for Pioneer and Cosel model numbers -XRWAC and earlier. 57V DC for Cosel model numbers -XRWAD and newer.
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