3-30 Installing the Drive
DC590+ Series DC Digital Drive
Motor Field Options
WARNING
Isolate the drive before converting to internal/external supply.
The FIELD CONTROL function block controls the motor field. The FLD CTRL MODE parameter allows you to select either Voltage or Current
Control mode.
• In Voltage Control mode, the FLD. VOLTS RATIO parameter is used to scale the motor field output voltage as a percentage of the input supply
voltage.
• In Current Control mode, the SETPOINT parameter is used to set an absolute motor field output current, expressed as a percentage of the calibrated
field current (IF CAL).
Internal/External Supply (Frames 2, 3, 4 & 5)
NOTE The Frame 1 unit allows only an internal motor field supply. The Frame 6 and Frame H units always require an
external motor field supply. For information about the following terminal/power boards refer to Appendix E:
“Technical Specifications” - Terminal Information (Power Board).
The internal motor field is more widely used, however, there is provision on the unit for an external motor field supply to be connected (perhaps for
where the field voltage is greater than the input voltage and therefore not attainable, or where the motor field is switched separately for convenience).
Figure 3- 12 Typical connection diagram
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