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Quick Start Guide for Herculine 2000 Series Actuators
February 2007
Page 2 of 10
3. Linkage Set-up (continued)
Variable Torque Linkage
A variable torque linkage is employed when it is desired to provide a non-linear torque profile throughout the full
range of final control element travel. In this general situation, the actuator and driven crank arms will be set up to
provide a higher torque for seating or unseating the final control element.
Vertical
Centerline
5°
Vertical
Centerline
45° 45°
Close Open
Actuator
Crank Arm
Damper
Crank Arm
Linkage
Horizontal Offset
a/n 23200
Figure 2 Variable Torque Linkage
4. Electrical Connections
The actuator terminal connections for the field wiring are located behind the cover on the actuator case. Power and field
wiring is brought into the actuator through two access holes located on the side of the actuator case.
Use both openings: one for low level wiring (control signal) and the other for high
level wiring (120Vac).
Do not run both the High Level and Low Level wiring through the same
opening.
Recommended Minimum Wire Size
In general, copper wire used unless locally applicable codes dictate otherwise.
Earth ground wire to common power supply -14AWG
Earth ground wire to single actuator. 120/240 Vac line leads. +24 V and common signal leads. Common signal leads,
relays, and aux switches – 18AWG
HercuLine
®
2000 Wiring Connections
158 ohm 158 ohm Install resistors to convert 1000 ohm
potentiometer to 135 ohms
1
1
REQUIRED ONLY IF AUTO/MANUAL
SWITCH IS PRESENT
158 ohm 158 ohm Install resistors to convert 1000 ohm
potentiometer to 135 ohms
11
11
REQUIRED ONLY IF AUTO/MANUAL
SWITCH IS PRESENT
Figure 3
HercuLine
®
2000 connections
Connection Terminal Description
Hot 1 Hot wire for 120/240VAC main supply.
NOTE:Use only if Auto/Manual switch is present.
Neutral 2 Neutral wire for 120/240VAC main supply
Auto/Manual
Switch Contact
3
4
Switch contact to indicate setting of actuator AUTO/MANUAL
switch.
Switch is closed when actuator is “NOT-IN-AUTO”