Rockwell Automation DC3N DC Drive User Guide, 1/4-2HP-115/230 VAC User Manual

Page 26

Operation

ATTENTION:

For frequent starts and stops, short the inhibit terminals,

decelerate to a minimum speed, or apply a dynamic brake to the motor. Do not
use any of these methods for emergency stopping. They may not stop a drive
that is malfunctioning. Removing AC line power (both L1 and L2) is the only
acceptable method for emergency stopping.

ATTENTION:

Frequent starting and stopping can produce high torque. This

may cause damage to motors, especially gearmotors that are not properly sized
for the application.

ATTENTION:

Starting and stopping with the inhibit terminal pins does not

disconnect AC power in the stop position. A hardwired AC power
disconnection switch must be mounted in close proximity to the operator’s
start/stop controls. This is required, as the DC3 drive does not have an armature
loop contactor. A single fault like a power device short may cause motor
rotation when in the stop mode. The user is responsible for assuring safe
conditions for operating personnel by providing suitable guards, audio or visual
alarms, or other devices. Failure to observe these precautions could result in
bodily injury.

Drive Operation

• Set voltage switch SW501 and SW502 to either 115V or 230V to match the AC

line voltage. Set voltage switch SW503 to either 90V or 180V to match the
maximum armature voltage (Figure 9).

• Verify that no conductive material is present on the printed circuit board.

• If using a 90 VDC or 130 VDC motor with 230 VAC line voltage, derate the

nameplate motor speed and torque by at least 30%. Contact the factory for
details.

ATTENTION:

If the motor or drive does not perform as described, disconnect

the AC line voltage immediately. Refer to the Troubleshooting section, page 35,
for further assistance.

Before applying power