Rockwell Automation DC3R Isolation Option Board - Manual (Page 13)

7 Installation
Speed adjust potentiometer connections
Figure 5. Speed Adjust Potentiometer Connections for
(a) Unidirectional Control and (b) Bidirectional Control
(a) (b)
The isolation option board can be hooked up to speed adjust potentiometer instead
of following an external current or voltage signal. To control a motor in one
direction, hook up the speed adjust potentiometer as shown in Figure 5(a); for
bidirectional control, use the connection in Figure 5(b).
ATTENTION: Because the reference potentiometer is connected through the
regulator to the armature power circuit, its terminals are at line potential. Use
a potentiometer that has a insulating shaft to insulate the operator knob from
this power circuit and that is capable of withstanding Hi-pot tests at 2000
Volts DC for one minute. Failure to observe this precaution could result in
severe bodily injury or loss of life.
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