Emerson 400501-05 Alternate Power Supply Wiring, Epsilon Auxiliary Power Supply Wiring Diagram

Epsilon Eb Digital Servo Drive Installation Manual

Figure 12: Epsilon Auxiliary Power Supply Wiring Diagram

Alternate Power Supply Wiring

An Alternate Power Supply (APS) allows the drive to retain motor position information and serial communications when the main AC power supply is disconnected. You must reset the drive, either using the reset button or a reset input, after AC power is re-applied if the backup supplies have been active.

Enabling APS power is done by sliding open the access panel on the side of the drive. Then move the jumper into the APS position using needle nose pliers.

Use static control procedures when handling the jumper inside the drive case.

The APS input is isolated from all other circuits on the Epsilon drive including the DC bus, logic and I/O. This permits you to use one common 24 VDC power supply for multiple drives without concern for ground loops and noise coupling between drives. The APS connection will generate some high frequency ripple (.25 Amps at 80 khz) on the APS power lines. This may disturb sensitive equipment that shares the same power supply.

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