text: <s>[INST] PowerFlex DC line voltage operation ranges Summary: Can the PFDC bridge operate with line voltages other than given in specs We have many situations in the elevator industry where the armature voltage of a given machine is above 240, and below 500 vdc. An example is one I am working on now where the armature voltage is 315 vdc. The existing machine is operating with an AB1395 drive, and it is fed by power from an isolation transformer with a secondary of 315 vac. This is a common practice, to help optimize form factor, and to help in sizing the transformer. So my question is, can I now use a PFDC drive with the same line voltage feeding the SCR bridge? There is no information in the literature. [/INST] Technical document for the PF-DC http://literature.rockwellautomation.com/idc/groups/literature/documents/td/20p-td001_-en-p.pdf What I see in this document is that your 315VDC motors fall in a hole for the Rockwell PF-DC products. This is DEFINITELY a time you should call Rockwell Tech Support and talk with the drives group: Dial 440-646-3434 Option 3 for Tech Support Option 1 for Direct Dial Option 1 to enter code Code 511 for DC Drives \\n </s>