Honeywell Herculine 2000 Series Quick Start Manual page 4

62-86-25-14
February 2007
4. Electrical Connections (continued)
®
HercuLine 2003 Wiring Connections
®
Figure 5 HercuLine
Series 90 Control – HercuLine
Series 90 Controls are commonly used in building environmental systems and flame safeguard systems to provide
modulating control. The control is affected by balancing a 135 ohm potentiometer. The HercuLine 2001 provides
an emulation of this system as follows. The current output is used to excite the potentiometer in the controller. To
do this it is set permanently at 11 mA. This produces a 1.5 volt span. The wiper is then connected to the
HercuLine 2001 input, which is operating in voltage mode. The returns from both the input and the output are tied
together.
Series 90 terminals are typically color coded white, red and blue. Conventionally, red is the wiper and white and
blue are the two ends of the potentiometer. On a drop in temperature, the wiper moves toward the blue terminal.
Connections
Quick Start Guide for Herculine 2000 Series Actuators
2003 Wiring Connections
®
2001 model only
4-20mA output
4-20mA input
Figure 6 Series 90 connections
®
HercuLine 2003 Operation
The 2003 actuator is uni-directional (it does not
reverse rotation with a reversal in control action).
Figure 5 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.
TB3
1+ White
2-
4+
Red
Blue
5-
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