Rockwell Automation DC3E Non-Regenerative DC Drive User Guide 1/4 - 2 HP, 115/230 VAC - Manual (Page 73)

65 Application Notes
RUN/JOG switch
Using a RUN/JOG switch is recommended in applications
where quick stopping is not needed and frequent jogging is
required. Use a single pole, two position switch for the
RUN/JOG switch, and a single pole, normally closed,
momentary operated pushbutton for the JOG pushbutton.
Connect the RUN/JOG switch and the JOG pushbutton as
shown in Figure 18, page 66. When the RUN/JOG switch
is set to JOG, the motor decelerates to minimum speed
(minimum speed is determined by the minimum speed
trimpot setting). Press the JOG pushbutton to jog the
motor. Return the RUN/JOG switch to RUN for normal
operation.
ATTENTION: Starting and stopping with the start/stop
terminals does not disconnect AC power in the stop
position. A hardwired AC power disconnection switch
must be mounted between the AC source and terminals
L I and L2. 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.
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