11 Optional Devices
11.3Field power supply
Page 92 Docu-No.: 1090020601-EN Rev. 1.2.1
11.3 Field power supply
In some select applications, a field wound DC motor is used. In that
instance, a KCM DC Field Supply is used. (part number 0000000639)
It is mounted near the motor. It is supplied with line power and the
supply will output DC field power. For 115 Vac line, expect
approximately 150 Vdc output. For 230 Vac line, expect about 300
Vdc output. These values will change based upon line voltage, line
frequency and field loading as the DC output utilizes filter capacitors
to minimize ripple.
The unit can be configured for either 115 Vac or 230 Vac single phase.
Two different modes of operation may be used.
• Mode 1: Constant Field
JP1 and JP2 are installed and JP3 and JP4 removed. Field power
is present as soon as line power is applied to the power supply. No
connection to X3 is required.
• Mode 2: Controlled Field
JP3 and JP4 are installed and JP1 and JP2 removed. The field
power is controlled by X3. When X3 is closed, field power is
available. When X3 opens, field power is removed from the motor.
•See Fig. 12.13 for wiring details.
Note:
• The power supply uses two, 2 A, 5x20 mm Slo-Blo fuses.
Fig. 11.2 Field supply
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