Installing the Drive 3-13
DC590+ DRV Series DC Digital Drive
External Field Supply (FL1, FL2)
WARNING
Verify that power is disconnected before proceeding.
This connection is not available on Frame 1 DRVs. Frame 7 DRVs always require an external field supply.
If this option to convert to using an external ac field is not required, do not connect to these terminals.
Occasionally, motors require field voltages greater or smaller than can be supplied by the main L1, L2 and L3 supply. When required, connect the
external field supply to terminals FL1 and FL2. Always derive the supply from L1 and L2 phases directly, or indirectly through a single-phase
transformer. The required field voltage determines the size of the external field supply.
Caution
An "out-of-phase" external supply can blow fuses and cause faulty operation. The AC field supply is normally fed internally from L1 and L2. Some
motors require field voltages greater than the mains supply at L1, L2, and L3. This external field supply must be "in phase" with the main supply. The
supply connection to terminal FL1 must be in phase with the supply on terminal L1 and FL2 must be in phase with the supply on L2.
Depending on the drive's field regulator rating, reconnect the field supply jumpers on the drive as described below:
1. FOR FRAME 2 MODELS (10A field, maximum):
• Move the jumper from position 1 to position 2.
• Externally protect the field supply with 10A semiconductor fuses rated for the supply voltage.
2. FOR FRAME 3 MODELS (20A field, maximum):
• Move the RED wire from internal terminal F16 to F19 and move the YELLOW wire from internal terminal F8 to F18.
• Externally protect the field supply with 10A semiconductor fuses rated for the supply voltage.
3. FOR FRAME 4 & 5 MODELS (30A field, maximum):
• Move the RED wire from internal terminal F2 to F3, EX L1, and the YELLOW wire from internal terminal F5 to F6, EX L2.
• Externally protect the field supply with 30A semiconductor fuses rated for the supply voltage.
4. FOR FRAME 6 & 7 MODELS (60A field, maximum), refer to Appendix E : "Technical Specifications" - Terminal Information (Power Board).
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