LA-2400 Series

Installation Manual

Linear Actuators

Redefining Flow Control

Instruction Manual

IM-0443

LA-2400 Series
Linear Actuator
Table of Contents
General Information .............................................. 3-4
Introduction ....................................................... 3
Receiving/Inspection ......................................... 3
Storage ............................................................... 3
Equipment Return .............................................. 3
Identification Label ............................................ 4
Abbreviations Used in This Manual ................... 4
General Actuator Description ............................. 4
Basic Models ...................................................... 4
Product Specifications .............................................. 5
Installation ................................................................ 6
Typical Wiring Diagrams ...................................... 7-8
Start-up/Calibration ............................................. 9-10
Start-up/Calibration for Units with Amplifier.... 11-14
Amplifier Specifications .................................... 11
Amplifier Start-up ............................................. 12
Amplifier Parts Identification ............................ 13
Amplifier DIP Switch Chart .............................. 13
Typical Amplifier Wiring Diagram .................... 14
Amplifier Troubleshooting Chart ....................... 14
Troubleshooting Guide ...................................... 15-16
Component Location Drawing .......................... 17-18
Maintenance, Gear and Drive Nut Selection .... 19-20
Parts List and Recommended Spares ................ 21-23
Major Dimensions ............................................. 23-24

Due to wide variations in the terminal numbering

of actuator products, actual wiring of this device
should follow the print supplied with the unit.

2
 GENERAL INFORMATION

INTRODUCTION WARNING - ELECTROSTATIC DISCHARGE

Rotork Controls, designs, manufactures, and tests its This electronic control is static-sensitive. To protect
products to meet many national and international the internal components from damage, never touch
standards. For these products to operate within their the printed circuit cards without using electrostatic
normal specifications, they must be properly installed discharge (ESD) control procedures.
and maintained. The following instructions must be
followed and integrated with your safety pro-gram when RECEIVING/INSPECTION
installing, using and maintaining Rotork Controls Carefully inspect for shipping damage. Damage to the
products: shipping carton is usually a good indication that it has
received rough handling. Report all damage
• Read and save all instructions prior to installing, immediately to the freight carrier and Rotork Controls
operating and servicing this product. Unpack the product and information packet—taking
care to save the shipping carton and any packing
• If you do not understand any of the instructions, material should return be necessary. Verify that the
contact your Rotork Controls representative for items on the packing list or bill of lading agree with
clarification. your own.

• Follow all warnings, cautions and instructions STORAGE

marked on, and supplied with, the product. If the product will not be installed immediately, it
should be stored in a clean, dry area where the ambient
• Inform and educate personnel in the proper temperature is not less than -20° F. The actuator
installation, operation and maintenance of the should be stored in a non-corrosive environment. The
product. actuator is not sealed to NEMA 4 until the conduit
entries are properly connected.
• Install equipment as specified in Rotork Controls
installation instructions and per applicable local and EQUIPMENT RETURN
national codes. Connect all products to the proper A Returned Goods authorization (RG) number is
electrical sources. required to return any equipment for repair. This
must be obtained from Rotork Controls.
• To ensure proper performance, use qualified (Telephone:
personnel to install, operate, update, tune and 414/461-9200) The equipment must be shipped,
maintain the product. freight prepaid, to the following address after the RG
number is issued:
• When replacement parts are required, ensure that
the qualified service technician uses replacement Rotork Controls
parts specified by Rotork Controls. Substitutions 5607 West Douglas Avenue
may result in fire, electrical shock, other hazards, Milwaukee, Wisconsin 53218
or improper equipment operation. Attn: Service Department
• Keep all product protective covers in place (except To facilitate quick return and handling of your
when installing, or when maintenance is being equipment, include:
performed by qualified personnel), to prevent • RG Number on outside of box
electrical shock, personal injury or damage to the • Company Name, Contact Person, Phone/Fax No.
actuator. • Address
• Repair Purchase Order Number
WARNING • Brief description of the problem
Before installing the actuator, make sure that it is
suitable for the intended application. If you are unsure
of the suitability of this equipment for your installation,
consult Rotork Controls prior to proceeding.

WARNING - SHOCK HAZARD

Installation and servicing must be performed only
by qualified personnel. 2

Redefining Flow Control 3

 GENERAL INFORMATION
IDENTIFICATION LABEL GENERAL ACTUATOR DESCRIPTION
The LA-2400 series actuators are electrically operated,
bi-directional linear devices. They are designed for
strokes to 24 inches (610 mm) and thrusts to 1,500 lbf
(6672 N) and include a non-clutchable manual over-
LA-2410 ride handwheel. The drive motor may be single or
1627 C 01
120 / 50-60 / 1 / 1
three phase ac, or dc.
95C 036051 - 1
Options Include:
LA-2410
• Up to four independently adjustable limit switches
• Contactless position feedback
• Linear potentiometer position feedback
• Thermostatically controlled anti-condensation heater
• Integral or remote servo-amplifiers
• Trunnion mounting
MODEL NUMBER: LA24 10 Series
• 4 to 20mA position feedback
SERIAL NUMBER: 1627 C 01
• Shaft bellows
Sequential Number Year Built • Paint/coatings
Month Built

The LA-2400 series include 120/240 Vac single phase

models, 240/380/480 Vac three phase models and 24
Vdc models. These actuators are controlled by
ABBREVIATIONS USED IN THIS MANUAL “switched” power inputs or by a remotely installed
A or Amps Ampere servo-amplifier.
AC Alternating Current
The LA-2400 series is also available with an internal
°C Degrees Celsius
servo-amplifier. They require 120 or 240 Vac (depend-
CW Clockwise
ing on model) unswitched, single phase line voltage
CCW Counterclockwise
input and a dc analog command signal for a complete,
DC Direct Current
closed-loop positioning system in a compact enclosure.
°F Degrees Fahrenheit
G Earth Ground
Hz Hertz
kg Kilogram BASIC MODELS
L Line (power supply) LA-2410, LA-2420, LA-2450 and LA-2490 are all single
lbs. Pounds phase ac, three wire, plug reversible models. They are
lbf. Lbs. Force compatible with Rotork Controls remotely located
LVDT Linear Variable Differential Transformer AD-8240 Series servo amplifiers, or any bi-directional
mA Milliamp contact type control.
mfd Microfarad These actuators may also be equipped with an internal
mm Millimeters servo amplifier that features loss of signal detection for
N Newton (force) current command signal inputs and can be calibrated to
NEMA National Electrical Manufacturing Association allow the actuator to lock-in-place or drive to a preset
Nm Newton Meter position should the command signal drop below
NPT National Pipe Thread 3.8mA. Also included is a dynamic brake circuit to
Ph Phase increase positioning accuracy.
PL Position Limit Switch
RPM Revolutions per Minute The LA-2415 is a three phase ac, plug reversible model
sec. Second compatible with Rotork Controls remotely located AD-
TL Thrust Limit Switch 8900 servo amplifier or any bi-directional contact type
Vac Volts ac control. The LA-2440 is a dc plug reversible model and
Vdc Volts dc is compatible with Rotork Controls remotely located
VR Variable Resistance model AD-7530 servo amplifier or other compatible
W Watt control device.
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4
 LA-2400 SERIES PRODUCT SPECIFICATIONS
GENERAL SPECIFICATIONS ELECTRICAL SPECIFICATIONS

Speed / Thrust: Power Requirements:

in. per sec. / lbf. Input Power Current (Amps)
Model Model
(mm per sec. / N) Volts/PH/Hz Run Stall
LA-2410 LA-2410 120/1/50-60 0.9 1.2
0.1/800 0.2/800 0.4/200 0.7/200
LA-2415 LA-2415 240/480/3/50-60 0.4/0.2 1.3/0.65
(2.5/3558) (5.1/3558) (10.2/890) (17.8/890)
LA-2450 LA-2415 380/3/50 0.3 0.9
LA-2420 0.1/1500 * 0.2/1500 * 0.4/550 0.7/450 LA-2420 120/1/50-60 2.5 2.9
LA-2490 (2.5/6672) (5.1/6672) (10.2/2446) (17.8/2002) LA-2440 24 Vdc 1.7 7.5
0.2/550 0.25/550 0.6/150 1/150 LA-2450 240/1/50-60 0.45 0.5
LA-2440
(5.1/2446) (6.4/2446) (15.2/667) (25.4/667) LA-2490 240/1/50-60 1.1 1.6
*1500 lbf. available in 6 in. stroke only.

Voltage Tolerance: +/-10%

Stroke: 6 to 24 in. (152 to 610 mm)
Conduit Entry: Two, 3/4 NPT.
Lubrication & Type: Permanently lubricated, Amoco-
Amolith Rykon All-Weather Field Wiring: To barrier terminal blocks.
Premium Grease #2.
Gearing: Hardened steel spur gear train, self-locking.
OPTIONS
Temperature: -40° F to 150° F. (-40° C to 65° C) Anti-condensation Heater: 120/240 Vac, 30W
Environment Rating: Dust ignition-proof for Class II, Two auxiliary position limit switches: 5A SPDT,
Division I, Groups E, F and G, 120/240 Vac
and Type 4 (IP65) indoor and
outdoor. 1000 Ohm Feedback Potentiometer: 2 Watt Max.
Enclosure Material: Cast Aluminum Alloy. dc
Contactless Feedback: Hall Effect
Approximate Weight: 40 lbs. (18 kg) 4-20mA Feedback Transmitter:
Isolated, loop-powered 12-36 Vdc at 25 mA.
Mounting: Clevis mount in any position.
Trunnion (not available with 6 in. stroke). Maximum Load (Ohms) = Power Supply Voltage - 8
When mounted vertically with the ram
0.020A
extending up, option D056 (vertical
moisture shield) must be used for wet Servo-Amplifier Model AD-8130: 120/240 Vac. (For
applications. more information
see Rotork Controls
Manual Handcrank: Permits local operation.
IM-0523).
Thrust Limiting: Bi-directional Accuracy: +/-1.0% of full rated travel
(factory set and not adjustable).
Repeatibility: 0.5% of full rated travel
Modulating Rate: (1% position changes) Hysteresis: 0.5% of full rated travel
LA-2415, 1200 starts/hour.
Linearity: +/-1.0% of full rated travel
All others, 2000 starts/hour.
Input Deadband: Adjustable
Duty Cycle:
Loss of Signal: Stays in place or runs to pre-set on cur-
Modulating: LA-2410, LA-2415, LA-2440, LA-2450.
rent command signals dropping below 3.8 mA (field
20%: LA-2420, LA-2490.
selectable)
Clevis: Non-rotating. Command Signal Inputs: Field selectable
4 to 20 mA (200 Ohm impedance)
0 to 5 or 0 to 10 Vdc (100,000 Ohm impedance)
High and Low Trim: Adjustable
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Redefining Flow Control 5

 INSTALLATION
MOUNTING WIRING
Refer to installation dimensions on the installation print The wiring diagram on page 6 shows the fundamental
sent with the actuator. The rear cover (opposite the connections for standard three-wire reversible single-
ram) must have clearance so it can be removed for phase ac motor, standard permanent magnet dc motor,
adjustments and interconnect wiring. and three phase AC models.
The actuator is mounted with pins through the rear and The wiring diagram on page 7 shows the fundamental
front clevises. The rear clevis is normally the stationary connections for single phase AC actuators with an
end. The device to be positioned must be such that it integral AD-8130 servo-amplifier, along with other
will allow retraction and extension. Side loading must options.
be avoided. Side loading will lead to excessive operat-
ing thrust which will cause premature bearing failure. A barrier type terminal strip is located under the rear
The device to be positioned must not require greater enclosure cover at the rear clevis end of the actuator.
thrust than the rating of the actuator. Mount the rear Two ¾ inch NPT conduit entries are available for field
clevis to the stationary actuator support device first, use. See the installation dimension drawing on the last
then move the traveling portion of the device to the page of this manual for their location.
front clevis and mount it. CAUTION: On standard single-phase wiring, the
The front clevis is non-rotating. The installation should position limit switches and the thrust switches are
place no torque upon the clevis or premature failure of wired directly in the motor circuit and protect it at
the actuator will result. the extremes of travel or at thrust cutout. Three
phase AC or DC units must have these thrust and
As an option, trunnion mounting is available on position limit switches wired into the controlling
actuators with 12 inch (305 mm) or greater strokes. device to cause end of travel or thrust shutdown.
Dimensional details of this style of mounting is shown Care must be taken in wiring these to the controlling
on page 18 of this manual. device so that the appropriate direction of control is
turned off when that direction’s limit switch is
When mounted vertically with the ram extending
actuated. If care is not taken in phasing the equip-
up, option D056 (vertical moisture shield) must be
ment, damage may occur to the actuator or driven
used for wet applications.
load.
• All wiring must be done in accordance with prevail-
ing codes by qualified personnel.
• Typical wiring diagrams are shown on pages 6-7.
Actual wiring should follow the wiring diagram
supplied with the actuator.
• Fusing must be installed in line power, and should be
of the slow blow type.
• Wiring must be routed to the actuator through the
two conduit openings. Generally, one conduit will
contain input power and earth ground wires. The
other conduit would then contain low level input and
output signal wiring.
• It is required that all low level signal wiring be a
shielded type with the shield grounded at source
common.
• After installation, it is recommended that all conduits
be sealed to prevent water damage and to maintain
NEMA 4 enclosure rating.
• Remote mounted servo amplifiers must maintain a
maximum of 50 feet of wire run to the actuator.

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6
 TYPICAL WIRING DIAGRAMS
ACTUATOR WITHOUT A BUILT-IN AMPLIFIER

LA-2410, LA-2420 (120 Vac) LA-2440 (24 Vdc)

LA-2450, LA-2490 (240 Vac)

Actuator AC Power Applied to Terminals DC Power Applied to Terminals

Action 1&2 1&3 1(+) & 2(-) 1(-) & 2(+)
Viewing Actuator Ram Extend Retract Extend Retract

LA-2415 SERIES ACTUATOR

Due to wide variations

in terminal numbering
of actuator products, actual
wiring should follow the print
supplied with the actuator.

Notes: 1. The thrust limit switches (TL1 & TL2) are factory set to trip if the thrust exceeds the actuator rating.
2. Shielded wire is required for command and position feedback signal wiring.

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Redefining Flow Control 7

 TYPICAL WIRING DIAGRAM
LA-2400 SERIES ACTUATORS WITH A BUILT-IN AD-8130 AMPLIFIER
(120/240 Vac, Single Phase, 50-60 Hz)

Due to wide variations

in terminal numbering
of actuator products, actual
wiring should follow the print
supplied with the actuator.

Notes:
1. All references to actuator ram movement are as viewed facing the front clevis.
2. An increasing command signal will result in ram extension.
3. The thrust limit switches are factory set to trip if the thrust exceeds the actuator rating.
4. Shielded wire is required for command and position feedback signal wiring.
5. Comand signal input:
4 to 20 mA into a 200 ohm impedance
0 to 5 or 0 to 10 Vdc into a 100,000 ohm impedance
6. Refer to amplifier instruction manual for proper DIP switch settings and amplifier setup.

-7-

8
 START UP & CALIBRATION
A. LIMIT SWITCH ADJUSTMENT PROCEDURE
(see Figure 1)
The limit switch assembly features up to four indepen- 1K ohm potentiometer
dently adjustable position limit switches. The setting of
one switch does not affect the setting of the other.
Limit switch #1 (PL1) is set to stop the actuator at the Fiqure 1
actuator fully extended position. Limit switch #2 (PL2)
is always set to stop the actuator at the actuator fully
retracted position. Each limit switch is activated by an
aluminum cam with a detent. When the cam roller falls
into this detent, the limit switch goes to its normal state.
To readjust the limit switches for the required actuator
stroke, the following methods are recommended:

FOR ACTUATOR WITHOUT A POSITION

FEEDBACK DEVICE
1. With no power applied to the circuits, manually turn
the manual handwheel until there is a slight gap Note:
(1/32”) between the front clevis and the outer 1K ohm potentiometer
support tube with the clevis hole in the required and #3 and #4 limit
mounting plate. switches are options.
CAUTION: Do not energize the actuator while
manual positioning or attempt to engage the
manual handwheel while the unit is running.
Rotation of the manual handwheel by the motor
could inflict personal injury. 4. The end of travel position limits PL1 and PL2 are
now set for full stroke of the actuator.
2. Loosen both set screws in PL2 cam (set screws are
120° apart). Rotate PL2 cam until the indent of the 5. Apply electrical power and run the actuator through
cam and the roller begin to mate and the limit its range to check for proper limit switch adjustment.
switch activates (when you hear a “click”). Tighten
the set screws.
3. Energize the motor and run front clevis to the fully FOR ACTUATOR WITH A POSITION
extended position. Loosen both the set screws of FEEDBACK DEVICE
PL1 cam and manually rotate the cam until the 1. With no power applied to the circuits, connect an
indent of the cam and the roller begin to mate and ohm meter across the potentiometer wiper arm and
the limit switch activates (when you hear a “click”). the “zero” (retract) end of the pot.
Tighten the set screws.
2. Follow steps 1 through 5 in the previous section.

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Redefining Flow Control 9

 START UP & CALIBRATION
A. POSITION FEEDBACK ALIGNMENT C. 4 to 20mA TRANSMITTER ADJUSTMENT
(Potentiometer)
The ST-4130 (1000 Ohm-input, 4 to 20mA output) two
Position feedback is provided through the use of a wire transmitter modulates the current on a direct
potentiometer attached to the limit switch assembly. As current supply proportional to the input resistance. It is
the switches are driven by the actuator gearing, the powered by a 12.0 to 36.0 Vdc unregulated power
potentiometer is simutaneously driven to provide supply line which is modulated from 4 to 20mA
position feedback. proportional to the resistance of the input.
1. Establish if full extend or full retract is to be used for
zero indication. On slide gate installations, zero
indication is normally used when the actuator is fully
extended and the gate closed.
2. Make sure end of travel limit switches are correctly
set for proper stroke length. 800 ohm maximum load when power supply is 24 Vdc

3. Use an ohmmeter to monitor the position of the

feedback potentiometer wiper to determine which For the unit to function properly the 4mA end of the
end of the pot gives a low ohm resistance indica- feedback potentiometer must be preset to 50 Ohms.
tion. 1. Position the actuator to the desired 4mA setting.
4. If the reading is greater than 50 Ohms, see Resistance of the potentiometer must be measured
Position Limit Switch Adjustment Procedure for without the ST-4130 connected.
actuators with a potentiometer. 2. With potentiometer resistance at 50 Ohms,
5. Run the actuator through its stroke range to ensure adjust ELEVATION for 4.0mA output.
the potentiometer is tracking through its electrical 3. Position the actuator to the desired 20mA setting.
range. (Generally 60 to 90% of 1,000 Ohms).
4. Adjust RANGE for 20mA output.
NOTE: On tandem potentiometer assembly, set the
bottom potentiometer to approximately 50 Ohms. 5. Repeat steps 1 through 4 until no further adjustment
is necessary.
6. To reverse the 4 and 20mA output, interchange the
B. POSITION FEEDBACK ALIGNMENT BLUE and YELLOW wires at the terminal block and
(Contactless) return to step 1.
Position feedback can also be provided through the use
of a contactless feedback device attached to the limit
switch assembly. As the switches are driven by the
actuator gearing, the feedback device is simutaneously
driven to provide position feedback.

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10
 START UP & CALIBRATION FOR UNITS WITH AMPLIFIERS
Switch and feedback device alignment is accomplished If the actuator does not run to the limit switch but stops
in the same manner as actuator without amplifiers, short and both red lights are off on the amplifier board,
except motor power is supplied from the amplifier. the amplifier has nulled and adjustments of span,
Varying the command signal input to the amplifier will elevation, loss of signal, or feedback potentiometer
allow you to reverse the extension or retraction of the may be required.
shaft to run to the minimum/maximum switch settings.

Amplifier Specifications
Standard Line Voltage: 120/240Vac, ±10%, Field Wiring Terminations: Plugable terminal block,
50/60 Hz (Slide switch select) wire size range 26-14
(Voltage input MUST match AWG.
the actuator motor voltage
Command Signal Monitor: The amplifier’s loss-of-
rating).
signal circuitry monitors
Power Consumption: Less than 20 watts for amplifier the command signal
functions only. input. If the command
signal drops below or
Voltage Output: Identical to voltage input. above the rating, the
Current Output: 10 amps max. at 120 or 240 Vac. actuator will either lock
in place or run to a
Fuse protection: Customer supplied. Size based on preset position (user
actuator controlled and local codes. selectable).
Null output (AD-8240): Rated 2 ampers Limit Signals: Internal: Part of servo control.
@120/240Vac, 50/60Hz.
Output Shaft Motion: All models can go either
Command Signal Inputs: direction on an increasing
• 4-20mA, 4-12mA, 12-20mA into a 200Ω shunt command signal. This is
resistor determined by the ZERO and
• 0-5Vdc into 100,000Ω impedance SPAN settings.
• 0-10Vdc into 100,000Ω impedance
Temperature Limits: -40° to 150° F (-40° to 65° C).
Position Feedback Signal: 1000Ω potentiometer
4-20mA Duty Cycle: Unrestricted modulating duty.
(Cont. duty).
Position Output Signal: Isolated 4-20mA, loop
powered with 12-36Vdc Position Accuracy: 1% of full range.
external power supply. Deadband: Factory preset to 1%. Field adjustable.

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Redefining Flow Control 11

 Amplifier Start-Up
1) Power. Before applying AC power to TB2 set slide 5) Transmitter. This adjustment sets the endpoints of
switch to the correct voltage (120/240Vac) the 4-20 mA transmitter to account for variations in
accuracy of the input command.
A) Set command signal to low level, normally 4 mA.
2) Command Calibration. This procedure calibrates
the minimum and maximum command to the unit. B) Depress ZERO pushbutton (S1) and LOS
pushbutton (S4) until the SPARE LED illuminates.
A) Set command signal to low level, normally 4 mA. While depressing pushbuttons, turn adjusting
B) Depress ZERO pushbutton (S1) and LOS knob CW to increase the 4 mA point, or CCW to
pushbutton (S4) until the SPARE LED illuminates. decrease the 4 mA point.

C) Set command signal to high level, normally C) Set command signal to high level, normally
20 mA. 20 mA.

D) Depress SPAN pushbutton (S2) and LOS D) Depress SPAN pushbutton (S2) and LOS
pushbutton (S4) until the SPARE LED illuminates. pushbutton (S4) until the SPARE LED illuminates.
While depressing pushbuttons, turn adjusting
3) Auto/Manual (Option). If the unit has the Auto/ knob CW to increase the 20 mA point, or CCW
Manual switch option, place it in the auto position. to decrease the 20 mA point.

4) Setpoints. These are the end of travel extremes 6) Deadband. This adjustment establishes the actuator
corresponding to the actuator output shaft positions servo sensitivity. It is factory set at 1% and should not
for low (4mA) and high (20mA) command signal be field adjusted. If the actuator begins to oscillate
levels. They are set by the ZERO and SPAN (Green and Yellow LEDs turn on and off rapidly),
pushbuttons and adjusting knob. All settings require decrease the sensitivity by holding deadband push
the holding of a push button and the turning of the button (S3) and turning adjusting knob CW until
adjusting knob. oscillation stops. Release button.
A) Set the command signal to lowest level,
normally 4mA.
7) Loss of Signal Preset. This adjustment establishes
B) Adjust LO setpoint (ZERO) by holding ZERO the position to which the actuator will travel upon a
push button (S1) and turning adjusting knob to loss of command signal condition. To activate this
move actuator output shaft to desired position. setting, SW3 must be OFF. Adjust the setting by
Turn the adjusting knob CW to extend the ouput holding the LOS push button (S4) and turning the
shaft. Turn the adjusting knob CCW to retract adjusting knob to set the preset position. Turn the
the ouput shaft. Release button. adjusting knob CW to extend the ouput shaft for
linear actuators, or rotate the output shaft CW for
C) Set the command signal to highest level,
rotary actuators. Turn the adjusting knob CCW to
normally 20mA.
retract the ouput shaft for linear actuators, or rotate
D) Adjust HI setpoint (SPAN) by holding SPAN push the output shaft CCW for rotary actuators.
button (S2) and turning adjusting knob to move
actuator output shaft to desired position. Turn
the adjusting knob CW to extend the ouput 8) Verify all settings by running the actuator through its
shaft. Turn the adjusting knob CCW to retract travel range several times.
the ouput shaft. Release button.

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12
Amplifier Parts Identification

Amplifier DIP Switch Chart

DIP Switch Configurations SW2
Switch Switch Position Function
ON (Up) Current Command
1
OFF (Down) 0-5V / 0-10V Voltage Command
ON (Up) 0-5V Voltage Command
2
OFF (Down) Current / 0-10V Command
ON (Up) LOS Lock-in-Place
3
OFF (Down) LOS Preset Position
ON (Up) Dynamic Brake On
4
OFF (Down) Dynamic Brake Off

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Redefining Flow Control 13

 Typical Amplifier Wiring Diagram
AD-8140

Due to wide variations

in terminal numbering
of actuator products, actual
wiring should follow the print
supplied with the unit.

Troubleshooting
For visual troubleshooting, LEDs are provided to display the status of the actuator.
These are located on the same side of the lower board as SW1.
The identification of these LEDs are shown in the table below.
LE D Functi on
This LED flashes when the microprocessor is running. If this is not on, verify
MICRO OK
power to the board.
This LED is on when the actuator is extending the ouput shaft for linear
INC.
actuators, or rotating the output shaft CW for rotary actuators.
This LED is on when the actuator is retracting the ouput shaft for linear
DEC.
actuators, or rotating the output shaft CCW for rotary actuators.
1 Flash - Indicates loss of 4-20 mA ignal (LOS).
L.O.S. 2 Flashes - Indicates loss of the feedback signal.
3 Flashes - Indicates indicates a stall condition.

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14
 TROUBLESHOOTING GUIDE
TROUBLE POSSIBLE CAUSE REMEDY

a. No power to actuator a. Check source, fuses, wiring

b. Motor overheated and internal thermal switch tripped b. Let motor cool and determine why overheating occurred
(single phase AC motors only) (such as, excessive duty cycle or ambient temperature)

c. Motor defective c. Replace motor and determine cause of failure

d. Both end of travel position limit switches open or one

d. Adjust switch settings or replace defective switch
open and one defective

e. Actuator ram stalled (mechanically jammed) e. Check drive load for mechanical jam and correct cause

f. Defective motor run capacitor

Motor won’t operate f. Replace capacitor
(single phase ac motors only)

g. Reduce load or replace actuator with one with

g. Load exceeds actuator thrust rating
appropriate thrust rating

h. Power applied to extend & retract at same time h. Correct power input problem

i. Amplifier defective i. Replace amplifier

j. Check command signal to verify signal greater than

j. Amplifier is in Loss of Signal
3.8 mA is present

k. Amplifier deadband is too wide k. Reduce deadband setting

a. Wiring to actuator incorrect a. Correct field wiring

Ram positions in wrong
direction for extend and
retract input power
b. Wiring from motor to terminals or switches is reversed b. Correct internal actuator wiring

a. Power applied to extend & retract at the same time a. Correct power input problem

b. Damaged power gearing b. Repair gearing

Motor hums,
but does not run
c. Defective motor run capacitor
c. Replace capacitor
(single phase ac motors only)

d. Damaged servo amplifier d. Replace servo amplifier

a. Defective power gearing a. Repair gearing

Motor runs,
but ram does not move
b. Screw drive nut stripped or pulled out of tube b. Repair or replace screw drive nut

a. Switch wired wrong or is defective a. Correct wiring or replace switch

Motor does not shut off
at limit switch
b. Switches are not aligned b. Align switches

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Redefining Flow Control 15

 TROUBLESHOOTING GUIDE
TROUBLE POSSIBLE CAUSE REMEDY
a. Thrust limit sw itch not properly w ired to control circuit a. Correct w iring per diagram

b. Thrust limit sw itch collars loose or not properly adjusted b. Adjust and tighten collars as required

c. Thrust limit sw itch defective c. Replace

Thrust limit sw itch d. Thrust limit sw itch bent and binding d. Replace shaft
operation
e. Thrust limit sw itch mounting or bushing is bent or
e. Replace as required
damaged

f. Thrust limit sw itch mounting block not aligned or secured f. Align and secure blocks as required

g. The actuator is overloaded g. Remove overload

a. Power not applied for other direction a. Correct power problem

b. Power always applied to one direction and electrically

b. Correct power problem
stalls when applied for opposite direction

c. Open limit switch for other direction c. Adjust or replace limit switch as required
Motor runs,
but only one way d. Actuator is in thrust overload d. Determine obstruction and correct

e. Motor has an open winding e. Replace motor

f. Motor and feedback potentiometer are out of phase f. Reverse potentiometer end leads

g. Amplifier is defective g. Replace amplifier

a. Amplifier deadband is too wide a. Reduce deadband setting

Poor response to command b. Amplifier is defective b. Replace amplifier

signal changes
c. Reduce noise. Also ensure that command signal wiring
c. Excessive noise on command signal
is shielded with shield grounded at source common only

a. Amplifier deadband is too narrow a. Increase deadband setting

Actuator oscillates b. Amplifier is defective b. Replace amplifier

at setpoint
c. Reduce noise. Also ensure that command signal wiring
c. Excessive noise on command signal
is shielded with shield grounded at source common only
a. Pot not aligned with end of travel extremes and is being
Pot feedback signal not a. Align pot to range of actuator
driven through its dead region
always present during
actuator ram movement b. Pot signal is erratic or nonexistent b. Replace pot

a. Defective pot a. Replace pot

Pot signal does not change
as actuator operates
b. Feedback gear not turning pot shaft b. Check gearing engagement and set screw in gear hub
Pot signal is reversed
a. Pot is wired wrong a. Reverse wiring from ends of pot at actuator terminal block
for output ram direction
a. Add heater and thermostat circuit and ensure that existing
a. Condensation caused by temperature variations and
circuit is continuously energized Check conduit entry and
humidity
seal to prevent water from entering via the conduit
Water droplets inside b. Ensure rear cover gasket is in place and replace if
motor area of actuator defective. Also ensure all cover bolts are in place and
b. Water entering actuator tightened. Check conduit entry and seal to prevent
water from entering via the conduit. Order optional
bellows kit if needed

Note: For actuators controlled by servo-amplifiers, refer to that servo-amplifier’s instruction manual for additional troubleshooting information.

-15-

16
 COMPONENT IDENTIFICATION
1. Actuator Housing 20. Feedback Assembly
2. Feedback Housing 21. Thrust Limit Switch (2)
3. Motor Cover 22. Motor Pinion
4. Feedback Cover 23. Power Idler Gear Assembly
5. Outer Tube 24. Feedback Idler Gear Assembly
6. Inner Tube Assembly 25. Limit Switch Gear
7. Clevis, Stationary 26. Drive Screw Gear
8. Clevis, Tube 27. Drive Screw
9. Housing Gasket 28. Handcrank Gear
10. Cover Gasket 29. Handcrank
11. O’ Ring, Stationary Clevis 30. Spring Pack Assembly
12. O’ Ring, Tube Clevis 31. Drive Screw Guide
13. Seal, Handcrank 36. Tube Clevis Roll Pin
14. Tube Scraper 41. Limit Switch Gear Set Screws
15. Tube Seals 42. Limit Switch Assembly Mounting Screws
16. Tube Spacer 43. Tube Bearing and Seal Retaining Ring
17. Tube Bearing 44. Drive Screw Guide Retaining Ring
18. Motor 49. Drive Nut
19. Motor Top (1phase ac only) 50. Potentiometer
51. Noncontact Feedback Module

Optional
noncontact
feedback
device and
4 limit switches.

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Redefining Flow Control 17

 COMPONENT IDENTIFICATION
DC Motor Side Feedback Side with Amp

AC Motor Side (1 phase) Feedback Side

18. Motor 37. Housing Bolts

19. Motor Top (1 phase ac only) 38. Motor Cover Bolts
20. Feedback Assembly 39. Feedback Cover Bolts
21. Thrust Limit Switch Assembly 40. Motor Mounting Bolts
32. AC Motor Capacitor (1 phase ac only) 45. AD-8130 Amplifier
33. AC Motor Resistor (1 phase ac only) 46. Heater
34. ST-4130 Loop Powered 4-20 mA 47. Ground Screw
Transmitter or EC-10883 analog conver-
48. Thermo Switch
sion module for contactless feedback
35. Terminal Strip

-17-

18
 MAINTENANCE
Under normal service conditions, the motor, gearing, To Remove Multi-turn Feedback Assembly 20:
bearings, and parts do not require periodic mainte- A. Separate housings.
nance. If for any reason the unit is disassembled in the B. Loosen set screws 41 and remove gear 25.
field, all Oilite bushings should be saturated with S.A.E. C. Remove screws 42.
20 or 30 non-detergent oil and all gearing heavily D. Remove feedback assembly 20.
coated with Amoco-Amolith Rykon all weather pre-
mium grease #2 or equal. To Remove Single-turn Feedback Assembly 20:
A. Separate housings.
Care should be taken to ensure that no foreign material
B. Loosen set screws 41 and remove gear 25.
is in the grease, which could cause premature failure.
C. Remove screws 42.
The screw shaft must be lubricated with Allex EP1L
D. Remove feedback assembly 20.
grease. DO NOT SUBSTITUTE.
To Change Tube Bearing 17 or Seals 15:
Refer to Pages 16 and 17 for component locations. A. Separate housings.
B. Remove outer retaining ring 43.
To Separate Housings: C. Remove scraper 14, spacer 16, seals 15 and tube
A. Disconnect motor wires which run through housing. bearing 17.
B. Extend front clevis to obtain access to roll pin 36.
C. Remove roll pin 36 and front clevis 8. To Remove Inner Tube Assembly 6:
D. Remove housing screws 37, 38 and 39. A. Separate housings.
E. Separate housing assemblies and remove gears 23 B. Remove retaining ring 44 and guide 31.
and 24. C. Hold screw shaft gear 26 and turn tube 6 to unscrew
from shaft.
To Remove Motor 18:
A. Separate housings.
B. If gear 22 is held to motor shaft with a retaining ring,
remove the ring and gear 22.
C. Remove screws 40.
D. Remove motor top 19. (ac motor only).
E. Remove motor stator and rotor 18.

POWER GEARING SELECTION CHART

(All Stroke Lengths)
Actuator Voltage Stroke Speed Motor Pinion Gear Power Idler Gear Assembly
120 or 240 Vac 0.1" + 0.2"/sec. 16A-017896-001 65A-016334-002
240/380/480 Vac 3 phase 0.4" + 0.7"/sec. 16A-017895-001 65A-016334-001
0.2" + 0.25"/sec. 16A-017896-001 65A-016334-002
24 Vdc
0.6" + 1.0"/sec. 16A-017895-001 65A-016334-001

-18-

Redefining Flow Control 19

 Single Turn Feedback Gearing & Drive Nut Selection Charts
LA-2410, LA-2415, LA-2420, LA-2450, LA-2490 (0.1”/sec. & 0.4”/sec.); LA-2440 (0.2”/sec. & 0.6”/sec.)
Stroke 1st Stage Gear 2nd Stage Gear Feedback Gear Drive Nut (3/4 - 10)
3" 65B-025344-004 N/A 16B-003803-133 61A-039553-003
4" 65B-025344-009 N/A 16B-003803-151 61A-039553-003
5" 65B-025344-001 N/A 16B-003803-109 61A-039553-003
6" 65A-017619-001 65A-025339-001 16B-003803-130 61A-039553-003
7" 65A-017619-001 65A-021042-001 16A-021043-001 61A-039553-003
9" 65A-017619-001 65A-017620-003 16B-003803-042 61A-039553-003
12" 65A-017619-001 65A-017620-003 16B-003803-131 61A-039553-003
15" 65A-017619-001 65A-021042-004 16B-003803-042 61A-039553-003
18" 65A-017619-001 65A-021042-005 16B-003803-133 61A-039553-003
24" 65A-017619-001 65A-021042-006 16B-003803-132 61A-039553-003

LA-2410, LA-2415, LA-2420, LA-2450, LA-2490 (0.2”/sec. & 0.7”/sec.); LA-2440 (0.25”/sec. & 1.0”/sec.)
Stroke 1st Stage Gear 2nd Stage Gear Feedback Gear Drive Nut (3/4 - 6)
3" 65B-025344-003 N/A 16B-003803-131 61A-039553-002
4" 65B-025344-007 N/A 16B-003803-149 61A-039553-002
5" 65B-025344-004 N/A 16B-003803-133 61A-039553-002
6" 65B-025344-002 N/A 16B-003803-132 61A-039553-002
7" 65B-025344-008 N/A 16B-003803-150 61A-039553-002
9" 65B-025344-001 N/A 16B-003803-109 61A-039553-002
12" 65A-017619-001 65A-021042-001 16A-021043-001 61A-039553-002
15" 65A-017619-001 65A-017620-003 16B-003803-042 61A-039553-002
18" 65A-017619-001 65A-017620-002 16B-003803-112 61A-039553-002
24" 65A-017619-001 65A-021042-002 16B-003803-050 61A-039553-002

Multi Turn Feedback Gearing & Drive Nut Selection Charts

LA-2410, LA-2415, LA-2420, LA-2450, LA-2490 (0.1”/sec. & 0.4”/sec.); LA-2440 (0.2”/sec. & 0.6”/sec.)
Stroke 1st Stage Gear 2nd Stage Gear Limit Switch Gear Drive Nut (3/4 - 10)
6" 65B-025344-004 N/A 16B-003803-133 61A-016350-001
12" 65A-017619-001 65A-025339-001 16B-003803-130 61A-016350-001
18" 65A-017619-001 65A-017620-003 16B-003803-042 61A-016350-001
24" 65A-017619-001 65A-021042-003 16B-003803-131 61A-039553-003

LA-2410, LA-2415, LA-2420, LA-2450, LA-2490 (0.2”/sec. & 0.7”/sec.); LA-2440 (0.25”/sec. & 1.0”/sec.)
Stroke 1st Stage Gear 2nd Stage Gear Limit Switch Gear Drive Nut (3/4 - 6)
6" 65B-025344-003 N/A 16B-003803-131 14A-016378-001
12" 65B-025344-002 N/A 16B-003803-132 14A-016378-001
18" 65B-025344-001 N/A 16B-003803-109 14A-016378-001
24" 65B-017619-001 65A-021042-001 16A-021043-001 61A-039553-002

-19-

20
 PARTS LIST
Recommended Spare Parts Indicated in Bold

ID Description Part Number Quantity

1 Motor Housing - ac Units 60D-042926-002 1
Motor Housing - dc Units 60D-042926-003 1
2 Feedback Housing w/o Amp 60D-023767-001 1
Feedback Housing with Amp 60D-023767-001 1
3 Motor Cover 60C-016326-001 1
4 Feedback Cover w/o Amp 60C-016328-001 1
Feedback Cover with Amp 60C-016326-001 1
(or with 21P option)
5 Outer Tube, 6" stroke 61B-040118-001 1
Outer Tube, 12" stroke 61B-040118-002 1
Outer Tube, 18" stroke 61B-040118-003 1
Outer Tube, 24" stroke 61B-040118-004 1
6 Inner Tube, 6" stroke 61B-039536-001 1
Inner Tube, 12" stroke 61B-039536-002 1
Inner Tube, 18" stroke 61B-039536-003 1
Inner Tube, 24" stroke 61B-039536-004 1
Tube Bearing 61A-016376-001 1
Retaining Ring 58B-014184-102 2
Washer 74A-016377-001 2
Retaining Ring 58B-019899-016 2
Key 61A-012228-001 1
Shim Spacer 13A-014549-006 A/R
7 Rear Clevis 60B-016330-001 1
8 Front Clevis 60A-016346-001 1
9 Gasket, Main Housing 13C-016366-001 1
10 Gasket, Cover 13B-016367-001 2
11 O Ring, Rear Clevis 74B-010957-133 1
12 O Ring, Front Clevis 74B-010957-020 1
13 Seal, Handwheel Shaft 19B-003815-021 1
14 Scraper 13A-012877-001 1
15 Tube Seal 19A-012878-000 2
16 Tube Spacer 61A-012876-001 1
17 Tube Bearing 61A-016348-001 1
18 Motor, LA-2410, 0.1" or 0.2" / sec. 61B-042938-002 1
Motor, LA-2410, 0.4" or 0.7" / sec. 61B-042933-005 1
Motor, LA-2415, 0.1" or 0.2" / sec. 23B-037613-001 1
Motor, LA-2415, 0.4" or 0.7" / sec. 23B-0037614-001 1
Motor, LA-2420, 0.1" or 0.2" / sec. 61B-0042938-006 1
Motor, LA-2420, 0.4" or 0.7" / sec. 61B-042933-001 1
Motor, LA-2440, 0.2" or 0.25" / sec. 61B-026405-001 1
Motor, LA-2440, 0.6" or 1.0" / sec. 61B-026404-001 1
Motor, LA-2450, 0.1" or 0.2" / sec. 61B-042938-003 1
Motor, LA-2450, 0.4" or 0.7" / sec. 61B-042500-001 1
Motor, LA-2490, 0.1" or 0.2" / sec. 61B-042938-005 1
Motor, LA-2490, 0.4" or 0.7" / sec. 61B-042933-004 1
19 Motor Top (1 phase ac units only) 60C-042348-001 1
Belleville Washers (1 phase ac units only) 56A-005478-001 2

-20-

Redefining Flow Control 21

 PARTS LIST
Recommended Spare Parts Indicated in Bold

ID Description Part Number Quantity

20 Single Turn Feedback:
Position Limit Switch, SPDT 46B-004053-405 2
Position Limit Switch, DPDT 46B-004053-414 2
1K Potentiometer 34B-0033104-001 1
1K/1K Potentiometer 34B-003956-160 1
Hall Effect Sensor 70B-039960-002 1
Multi Turn Feedback:
Travel Nut 14B-008602-001 1
Position Limit Switch, SPDT 46B-004053-409 2
Position Limit Switch, DPDT 46B-004053-414 2
1K Potentiometer 34B-100033-001 1
1K/1K 10 Turn Potentiometer 34B-100033-007 1
21 Thrust Limit Switch 46B-004053-405 2
22 Motor Pinion Gear See Selection Chart 1
23 Power Idler Gear Assembly See Selection Chart 1
24 Feedback Gearing See Selection Chart 1
25 Feedback Gear See Selection Chart 1
26 Screw Gear 16B-023764-001 1
27 Drive Screw:
6 inch, 3/4 - 10 62C-016356-001 1
12 inch, 3/4 - 10 62C-016356-002 1
18 inch, 3/4 - 10 62C-016356-003 1
24 inch, 3/4 - 10 62C-016356-004 1
6 inch, 3/4 - 6 62C-016355-001 1
12 inch, 3/4 - 6 62C-016355-002 1
18 inch, 3/4 - 6 62C-016355-003 1
24 inch, 3/4 - 6 62C-016355-004 1
28 Handwheel Gear Assembly 68A-018955-001 1
29 Handwheel 61A-016343-001 1
30 Thrust Spring Pack Assembly Consult Factory 1
31 Drive Screw Guide 14A-012868-001 1
32 Capacitor:
12.5 mfd, LA-2410, .1", .2", .4", .7" / sec. 24B-029812-027 1
35 mfd, LA-2420 24B-029812-026 1
5 mfd, LA-2450 24B-029812-028 1
7.5 mfd, LA-2490 24B-029812-030 1
33 Resistor, LA-2410, LA-2450 33B-003852-205 1
Resistor, LA-2420, LA-2490 33B-003852-305 1
34 ST-4130 Transmitter 70A-019948-001 1
35 Terminal Block 43B-003888-107 2
36 Roll Pin 57A-015215-125 1
37 Cap Screw 54A-015070-175 2
38 Cap Screw 54A-015070-200 4
39 Cap Screw 54A-015070-100 8
40 Screw, LA-2410 54A-015044-375 3
Screw, LA-2420, LA-2490 54A-015044-500 3
Screw, LA-2450 54A-015044-450 3

-21-

22
 PARTS LIST
Recommended Spare Parts Indicated in Bold

ID Description Part Number Quantity

41 Set Screw 54A-015037-019 2
42 Screw, Truss Head 54A-015032-025 3
43 Retaining Ring 58B-014185-162 2
44 Retaining Ring 58B-014183-050 1
45 AD-8140 Amplifier 68C-041180-001 1
46 Heater, 120 Vac 74A-016946-001 1
Heater, 240 Vac 74A-031965-001 1
47 Ground Screw 58B-024244-152 1
48 Thermoswitch 74A-023565-001 1
49 Drive Nut See Selection Chart 1
50 Screw Shaft Grease 73A-032878-001 1

INSTALLATION DIMENSIONS
(Trunnion Mount)

-22-

Redefining Flow Control 23

 LA-2400 MAJOR DIMENSIONS

Stroke C D
A B
in. (mm) Without Amp With amp Without Amp With amp
2 (51) 16.16 4.01 13.1 15.73 3.81 6.44
to 6 (152) (410) (102) (333) (400) (97) (164)
6.01 (153) 22.61 10.01 13.1 15.73 3.81 6.44
to 12 (305) (574) (254) (333) (400) (97) (164)
12.01 (305) 28.61 16.01 13.1 15.73 3.81 6.44
to 18 (457) (727) (407) (333) (400) (97) (164)
18.01 (457) 34.61 22.01 13.1 15.73 3.81 6.44
to 24 (610) (879) (559) (333) (400) (97) (164)

These dimensions are subject to change without notice and should not be used for preparation of drawings
or fabrication of installation mounting. Current installation dimension drawings are available upon request.
-23-

24
Notes

Redefining Flow Control 25

Notes

26
Notes

Redefining Flow Control 27

Redefining Flow Control

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Brassmill Lane, Bath, UK Rotork Controls for more information on
tel +44 (0)1225 733200 tel +1 (585) 247 2304 this product range
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As part of a process of on-going product development, Rotork reserves the right to amend and change
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release, visit our website at www.rotork.com
PUB045-003-00
The name Rotork is a registered trademark. Rotork recognises all registered trademarks. Published and
Issue 08/15 produced in the UK by Rotork Controls Limited. POWTG0815