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20 HercuLine™ 2000 Series Actuator - Installation, Operation and Maintenance Manual Revision 7
7/08
HercuLine
®
2003 Wiring Connections and Operation (Actionator 640D Replacement)
Wiring
Figure 10 HercuLine
®
2003 connections
Operation
The 2003 actuator is uni-directional (it does not reverse rotation with a reversal in control action).
Figure 10 illustrates the internal wiring and the external connections.
The smaller insert of the figure describes the limit switch action for one complete cycle. When the two-position
controller detects a sufficient fall in temperature in a heating application, the switch portion between the “4” and
“5” terminals will close.
The motor then rotates for 180º or until the opening switch breaks (stops are adjustable, factory set at 180º), and
stops in full open position.
A subsequent rise in temperature causes the controller to close the switch between the “4” and “6” terminals
when the motor will start to rotate (in the same direction) for 180º or until the closing switch breaks.
The motor stops in the closed position and completes one cycle.