Koei Industry Nucom Series User manual

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ELECTRONIC CONTROL
ACTUATOR
OPERATION MANUAL
“ Nucom Series “
ROTARY TYPE
Nucom-10NS
Nucom-10NM
Nucom-10NL
Nucom-10NL-100
Nucom-10NL-150
Nucom-10NL-200
Koei Industry Co., Ltd.

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FOR YOUR SAFETY
In order for better and safety use of the product for a long period, please observe this
“ WARNING and CAUTION “ carefully.
Here are the specification and operation manual for the product to prevent suffering
injury or loss by accidents.
The contents are divided into “WARNING” and “CAUTION” for different degree of
risks.
Please strictly observe them, as both of them are very important for your safety.
WARNING:
Improper handling of the product disregarding the notes under this
mark may cause injury or death to a man.
CAUTION: Improper handling of the product disregarding the notes under this
mark may cause injury or material loss.
WARNING
* This product is not of explosion-proof.
Do not use it in the environment with flammable gas (gasoline etc.)
or corrosive gas.
* Do not dismantle the actuator from the valve during power operation.
* Do not make wiring work when power is being supplied.
CAUTION
* Do not drop the product or give a shock to the product, for it may
cause defects to the product.
* Do not get on the actuator, or it may cause defects or an accident.
* Do not make wiring work in the rain or in splashing water.

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CONTENTS
1. GENERAL
2. CONFIGURATION
2-1 Configuration and names of parts
2-2 Dimensions
3. SPECIFICATION
4. OPERATION PRINCIPLE
4-1 Operation principle
4-2 Block diagram
5. INSTALLATION
6. WIRING
6-1 Cables
6-2 Water prevention
7. ASSEMBLY WITH A VALVE
7-1 Names of parts
7-2 Assembly procedures
8. POWER AND SIGNALS
8-1 Power source
8-2 Fuse and breaker
8-3 Input signals
8-4 Wiring diagram
9. CONTROL PACK (Module)
9-1 Names of parts
9-2 Direction mode
9-3 Mode selection during signal interruption
9-4 Sensitivity volume
9-5 ZERO / SPAN adjustment
10. OPERATION
10-1 Manual operation
10-2 Power operation
11. ADJUSTMENT
11-1 Potentiometer and limit switches
11-2 Mechanical stop
12. TROUBLE AND SOLUTION
13. MAINTENANCE
14. OPTIONAL EXTRAS

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1.GENERAL
This is a quarter turn electronic control actuator series.
The modulated actuators are operated with 4~20mA DC(or 1~5V DC) direct signals from a computer.
The precision (control resolution) of 1/250 is far higher than those of conventional pneumatic systems.
FEATURES
1. High control resolution of more than 1/250 with the original servo control pack.
2. Compact design with worm drive and robust aluminum die cast body.
3. Easy direction mode setting (Direct or reverse).
4. Easy mode selection (open, close or stop) during signal interruption.
5. Plural protections (thermal motor protector etc.).
6. Water protection: NEMA-4X (to IP-66).
2. CONFIGURATION
2-1 Configuration and names of parts
No. NAME
1 NEMA 4X Housing
2 Gear Cover
3 Valve Position Indicator
4 Valve Switch/Pot. Cover
5 Conduit
6 Terminal Strip Cover
7 Manual Over Ride Socket
8 Male Output Shaft
9 O/R Socket Dust Cover

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2-2 Nucom-10NS, 10NM, 10NL external drawings
<Nucom-10NS>
<Nucom-10NM>

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<Nucom-10NL, -100, -150, -200>

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3. FUNCTIONAL SPECIFICATION
Nucom-10NS Nucom-10NM
MODEL
ITEM STD SPECIAL STD SPECIAL
RATED POWER AC100·110·115·120V±10% (50/60 Hz)
AC200·220·230·240V±10% (50/60 Hz)
INPUT SIGNAL 4~20mA·DC (Standard Specification)
4~12/12~20mA·DC (Optional Specification)
OUTPUT TORQUE 49N·m
(5kgf·m)
98 N·m
(10 kgf·m)
196N·m
(20kgf·m)
392 N·m
(40 kgf·m)
15sec(50HZ) 30sec(50HZ) 15sec(50HZ) 30sec(50HZ)
OPERATION SPEED 12.5sec(60HZ) 25sec(60HZ) 12.5sec(60HZ) 25sec(60HZ)
TRAVEL ANGLE 0~90º
RESOLUTION Over 1/250
DEAD ZONE Max. 0.5% F.S.
LINEARITY Max. 0.5% F.S.
ACTION MODE Direct or reverse action selectable
MODE WHEN SIGNAL “OFF” CLOSE/STOP/OPEN : selectable
PROTECTION
OPEN/CLOSE limit switches
OPEN/CLOSE mechanical stopper
Motor thermal protector (120ºC)
AMBIENT TEMPERATURE Ambient temperature within: -25~55ºC
AC100V 0.65A 1.8A
AC110V 0.70A 2.0A
AC115V 0.60A 1.6A
AC120V 0.65A 1.8A
AC200V 0.35A 0.9A
AC220V 0.40A 1.0A
AC230V 0.30A 0.7A
RATED CURRENT
AC240V 0.35A 0.9A
MOTOR 20W Reversible 90W Reversible
INSULATION GRADE E Class
RATED OPERATION TIME Continuous
POSITION DETECTOR Potentiometer (Backlash revision type)
OUTPUT SIGNAL 4~20mA·DC (Standard spec.)
OPEN / CLOSE limit no-voltage output(Optional extra)
INSULATION RESISTANCE Between power terminal – case : 500V·DC / 100MΩ
WITHSTAND VOLTAGE Between power terminal – case : 1500V·AC / 1 minute
SERVO CONTROL UNITS Resin molded semi-conductors
MANUAL OPERATION Detachable crank handle (Standard accessory)
WIRE INLET G1/2×2 (Water-sealed conduit)
ENCLOSURE PROTECTION NEMA-4X (IP-66)
EXPLOSION PROOF Non explosion-proof
MOUNTING ANGLE 360º all directions
BODY MATERIAL Diecast aluminum
COATING Munsel N-6
WEIGHT 4.4kg 8.2kg

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Nucom-
MODEL
ITEM 10NL 10NL-100 10NL-150 10NL-200
RATED POWER AC110·115·120V±10% (50/60 Hz)
AC220·230·240V±10% (50/60 Hz)
INPUT SIGNAL 4~20mA DC (Standard Specification)
4~12/12~20mA DC (Optional Specification)
OUTPUT TORQUE 490N·m
(50kgf·m)
980N·m
(100kgf·m)
1470N·m
(150kgf·m)
1960N·m
(200kgf·m)
15sec 30sec 45sec 60sec
OPERATION SPEED 12.5sec 25sec 37.5sec 50sec
TRAVEL ANGLE 0~90º
RESOLUTION More than 1/250
DEAD ZONE Max. 0.5% F.S.
LINEARITY Max. 0.5% F.S.
ACTION MODE Direct or reverse action selectable
MODE WHEN SIGNAL “OFF” CLOSE/STOP/OPEN : selectable
PROTECTION
OPEN/CLOSE limit switches
OPEN/CLOSE mechanical stopper
Motor thermal protector (120ºC)
AMBIENT TEMPERATURE Ambient temperature within: -25~55ºC
AC100V 2.4A 2.9A 3.4A
RATED CURRENT AC110V 2.6A 3.0A 3.5A
AC115V
2.2A 2.6A 3.2A
AC120V
2.4A 2.8A 3.4A
AC200V
1.2A 1.5A 1.8A
AC220V
1.4A 1.6A 1.9A
AC230V
1.1A 1.3A 1.6A
AC240V
1.2A 1.4A 1.7A
MOTOR 100W Reversible
INSULATION GRADE E Class
RATED OPERATION TIME Continuous
POSITION DETECTOR Potentiometer (Backlash revision type)
OUTPUT SIGNAL 4~20mA·DC (Standard spec.)
OPEN / CLOSE limit no-voltage output(Optional extra)
INSULATION RESISTANCE Between power terminal – case : 500V·DC / 100MΩ
WITHSTAND VOLTAGE Between power terminal – case : 1500V·AC / 1 minute
SERVO CONTROL UNITS Resin molded semi-conductors
MANUAL OPERATION Detachable crank handle (Standard accessory)
WIRE INLET G1/2×2 (Water-sealed conduit)
ENCLOSURE PROTECTION NEMA-4X (IP-66)
EXPLOSION PROOF Non explosion-proof
MOUNTING ANGLE 360º all directions
BODY MATERIAL Diecast aluminum
COATING Munsel N-6
WEIGHT 20.5kg 21.5kg 22.5kg

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4. OPERATION PRINCIPLE
4-1 Operation principle
The system makes computation between input signals (4~20mA DC) and position signals, then turns the motor in
direction to balance them, and stops the motor when they are balanced.
The motor torque is transmitted through the worm structure to the actuator shaft.
Rotation direction (direct or reverse) is selectable at the setting switch.
The backlash revision type potentiometer detects and feedbacks the shaft position to the control pack.
The system always controls shaft position at the correlated rates with input signals.
< BLOCK DIAGRAM >

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CAUTION ON ENVIRONMENTAL INSTALLATION CONDITIONS
5.INSTALLATION
5-1 Installation
Cautions on indoor installation
*Avoid a hazardous place, as this is not an explosion-proof type.
*Cover whole the unit, when installing the unit in a place with water or material splashes.
* It is recommendable to reserve a space for manual maintenance work.
(depends on installation conditions.)
Caution on outdoor installation
* To avoid rainwater or direct sunlight, it is necessary to cover or shade whole the unit.
(This concerns temperature rise in the unit, and anti-climate property of seals used.)
* It is recommendable to reserve a space for manual maintenance work.
(depends on installation conditions.)
ACTUATOR SURFACE MATERIALS AND TREATMENT
MODEL
PART Nucom-10NS Nucom-10NM Nucom-10NL
BODY BASE
Die cast Aluminum
Oxidation treatment
Electrostatic coating
DRIVE UNIT
COVER
Die cast Aluminum
Oxidation treatment
Electrostatic coating
ELECTRO UNIT
COVER
Die cast Aluminum
Oxidation treatment
Electrostatic coating
CONTROL UNIT
COVER
Die cast Aluminum
Oxidation treatment
Electrostatic coating
OUTPUT SHAFT SUS 303
5-2 AMBIENT TEMPERATURE / FLUID TEMPERATURE
Ambient temperature
* Ambient temperature range : –25ºC~55ºC.
* A space heater against unit-condensation is available at option.
* For application beyond the specified range, consult our Sales Dept.
Fluid temperature
* For high temperature fluid, that may occasionally overheat the unit, radiation type bracket and coupling are
available at option.
* Standard bracket and couplings : Fluid temperature max. 65ºC
* Radiation type bracket and couplings : Fluid temperature higher than 65ºC
* For application beyond the specified range, consult our Sales Dept.

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CAUTION ON WIRING WORK
6. WIRING
6-1 Cables
Power cable
Use a Φ9~11mm (outside diameter) cable for the standard resin connector. (See FIG.6)
For customer connectors, use a proper size cable to match the connector preventing water ingress to the unit.
Signal cable
Use a sealed cable for signal wiring.
Do not make parallel wiring with power cable.
6-2 Water prevention
Make sufficient water prevention if vinyl tubes or conduits are used. (See FIG.7)
Note: Conduit not supplied. Seal the cable tightly preventing moisture penetration.
body
( Top )
( Bottom) Branch
( Top )
( Bottom)
Branch
Conduit

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CAUTION ON ASSEMBLY WITH A VALVE
7. ASSEMBLY WITH A VALVE
7-1 Names of parts
The actuator is removable from a valve, so that it is very easy to replace either part in case of trouble.
7-2 Assembly procedure
A : For a valve that does not have a mechanical stop on close side
A-1. Manually turn the valve and check if it is normal, and position it at full close.
(In case of a ball valve, position it at a full open.)
A-2. Bolt a bracket on the valve.
A-3. Tentatively bolt the actuator on the bracket.
A-4. Position the actuator at 0 % (close), then joint the output shaft and the valve stem with a coupling.
A-5. Secure the bolts.
A-6. Manually check that the actuator turns smoothly without eccentricity.
The assembly is over. For disassembly, work to the contrary.
B : For a valve that has a mechanical stop on close side
B-1. Check that the valve movement is normal, then position it at full close.
Be sure that the position is just inside the valve stop.

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B-2. Position the actuator at 0 % (full close), and set the actuator limit switch so as to work at 0 %.
(Note that the limit switch should normally be set to work at a half turn of manual handle past the full close of
signal rate.) (See FIG.9)
B-3. Bolt a bracket on the valve.
B-4. Tentatively bolt the actuator on the bracket.
B-5. Position the actuator at 0% (close), then joint the actuator shaft and the valve stem with a coupling.
B-6. Secure the bolts.
B-7. Manually check that the actuator turns smoothly without eccentricity etc.
Confirm that the limit switch works at 0 % before the shaft touches at the stop.
(If the shaft touches at the valve stop before the limit switch would function, the actuator may be locked, and
may overheat.
In such a case, the thermo protector will stop the motor, but the case may cause damages to the unit.)
8. POWER AND SIGNALS
8-1 Supply voltages
Standard AC 110, 115, 120, 220, 230, 240V±10% (50/60Hz)
Option AC 24V, DC 24V ±10% (50/60Hz)
For other voltages than the above, refer to our Sales Dept.
8-2 Fuse and breaker
Recommendable fuse/breaker capacities
Model Capacity of fuse/breaker Motor capacity
Nucom-10NS 5A 20W
Nucom-10NM 7A 90W
Nucom-10NL 10A 100W
8-3 Input signals
4~20mA (or 1~5V) DC
4~12mA (or 1~3V) DC
Standard
12~20mA (or 3~5V) DC
For other signal rates, please refer to our Sales Dept.

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8-4 Wiring diagram

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CAUTION ON USE
9. CONTROL PACK
9-1 Names of parts
(Note) The packs with green labels or with Serial No, “SP0000” marked on the side are fitted with an exterior type
250 Ωresister, and no need to be connected.
Take special care when wiring actuator. AC connectors are in the middle of terminal strip.
9-2 Direction mode
Either direct or reverse action is selectable at this switch.
1 = Direct action
Input signal 20mA --- Close
Input signal 4mA --- Open
3 = Reverse action
Input signal 4mA --- Close
Input signal 20mA --- Open

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9-3 Selection of a mode during signal interruption
A mode among open/stop/close is selectable at this switch in case of signal interruption.
Setting of direction (DA/RA) and mode in signal interruption are available in 6 combinations as shown in FIG.14.
(Note) The actuators are normally set in the following combination unless otherwise instructed.
Direction Reverse (RA mode)
In case of signal interruption STOP mode
* For US users
Our “Direct Action” = US “Reverse Action”
Our “Reverse Action” = US “Direct Action”
(Note) When input signal rates drop below 0.2mA, the actuator will recognize as “signal interrupted ”, and will
automatically act according to the mode as preset.
To prevent such undesired action, input signals should be exactly adjusted.
9-4 Sensitivity volume
Select switch 1 = Open action
Select switch 2 = Stop action
Select switch 3 = Close action
* Sensitivity volume
Clockwise for higher
Counter clockwise for lower
* Max. sensitivity:
Resolution = 1/400
* Min. sensitivity:
Resolution = 1/100

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Confirm that
p
ower is OFF before makin
g
manual o
p
eration
9-5 ZERO/SPAN Setting
*Zero/Span volumes are appropriately adjusted before shipment.
Do not adjust it after shipment unless imperatively required.
For adjustment, use a trimmer driver of less than 300 g/cm torque, for an excessive force may cause a
trouble.
*First adjust Zero, then adjust Span based on the Zero rate.
10. OPERATION
10-1 Manual operation
CAUTION
When making manual operation,
b
e sure that power is off. If power is o
n
while manual operation, the handle will
suddenly return !
Manual operation procedures
1.Remove the rubber cap from the actuator.
2.Insert the attached handle lever into the hexagonal
hole.
3.Turn the handle CW for close, CCW for open.
It is 15 turns between full close to full open.
* Do not turn the handle beyond the Valve positio
n
indicator’s “OPEN”, ”CLOSE” gauges, or the shaft will
touch at the stop.
Excessive force may cause a defect.
* ZERO volume
CW = To increase (to OPEN
direction)
Adjustable range - 25 ~ +25 %
* SPAN volume
CW = To increase (to OPEN
direction)
Adjustable range - 50 ~ +200 %

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Confirm that power is OFF before making power operation
10-2 Power operation
1. Before starting power operation, check the following if they are appropriate.
* Installation conditions
* Ambient temperature and fluid temperature
* Engagement with valve
* Positions at full close and full open
* Wiring
* Water prevention at conduit tube
* Voltage and input signals (check against specification sheet)
2. Supply power and signals.
3. Check the actuator action with input signals (4~20mA /Reverse action)
4mA 20mA 12mA
Full close Full open 50 % opening
4. Stop the actuator at an optional signal position, and you may check the control resolution referring to the
following example.
[Example]
In case of 4~20mA:
Resolution Minimum change in input signals
1/250 0.064mA
1/200 0.08mA
The resolution is normally preset at 1/250 before shipment. If necessary to change, adjust it by sensitivity
volume (See 9-4).
When raising the sensitivity volume, it is occasional that noises on signals may actuate the unit, if they are not
strictly eliminated.
After the checking is over, start operation.

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11. ADJUSTMENT
11-1Potentiometer and limit switches
1. Position the Valve position indicator at 50 % manually, and the shaft will come to the position as shown in
FIG.19. (See that the shaft is parallel with the actuator bottom)
2. Connect the adjuster. (FIG.20) :
3. CN1 with control pack, CN2 with actuator
4. Shift the adjuster switch to “ADJ ”.
5. Supply power and signals to control pack.
6. Unscrew and loosen the sleeve.
7. Set the input signal at 12mA, then turn and fix the sleeve at the position where both the adjuster 2 lamps go off.
8. Shift the adjuster to “ACTION ”. If the input signal position is not matching with the potentiometer (as either
adjuster lamp is on), the shaft will self-turn to revise the gap.
9. If the gap is very slight, revise it with ZERO VR at the control pack.
10. Fix the valve position indicator at 50 % position.
11. Set the input signals at 4mA and 20mA, and confirm that the respective shaft positions are matching to the
Valve position indicator.
12. Now the potentiometer adjustment is over.
Adjust the limit switches (OP/CL) as follows :
Loosen the limit cams and adjust the limit switches (Upper = CL, Lower = OP), so as to function at a half
turn of manual handle past 4mA and 20mA points, respectively.
*Ascertain that the mechanical stops will function only at a half turn of manual handle past the limit switches
functional points.

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11-2 Mechanical stop
1. Referring to Fig.21, adjust the mechanical stops with the stops’ bolts and nuts as follows.
Set the limit switches functional points at a half turn with handle past input signal OP/CL positions. Set the
mechanical stop positions at a half turn with handle past limit switches functional points.
2. Adjusting procedure
Loosen the locknuts allowing the stop bolts to turn.
Fix the stop bolts as shown in FIG.21, and secure them with locknuts.
* If the mechanical stops are adjusted to function before limit switches OP/CL positions, the actuator may
possibly be locked during power operation, causing overheat and stall by the motor thermal protector.