RPM MHPWS-QNN Series User manual

Doc.No. : U-MHPWS-QNN-CAN-EN
V1.01, 2020.03.27
MHPWS-QNN Series
User Manual
Electro-Hydraulic Actuators

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Important notice!
This manual consists of content to guide the installation and operation of MHPWS-QNN product.
Safety notices in the manual are specific precautions to reduce the risk of personal injury and
equipment damage.
Users should read and understand these instructions. Failure to observe these safety notices may
result in personal injury, equipment damage, and voiding warranty.
The safety notices are designated as follows.
: Signifies potential dangers that, if not followed, can result in serious injury or even
death.
: Outlines precautions for the user to avoid injury or equipment damage.
: Important information in understanding the installation and operation of the MHPWS-
QNN actuator.
WARNING
NOTE
CAUTION

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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 MHPWS-QNN Parts 1.2 Identification
2. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 User Safety 2.2 Mechanical and Electrical Safety
2.3 Transport 2.4 Storage
2.5 Packaging 2.6 Installation Precautions
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Valve Alignment
3.1.1 Shaft Coupling Connection 3.1.2 Flange Adapter Connection
3.2 MHPWS-QNN Mounting
3.3 Connecting Power and Signal Cables
3.4 Position Setting
3.4.1 Stroke Limiter Setting 3.4.2 Testing for Proper Functioning
3.4.3 OPEN/CLOSE Calibration Function
3.4.4 FULL CLOSE Calibration Instructions
3.4.5 Precautions During Calibration
4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 Normal Operations Check/Inspection
4.1.1 Normal Operation 4.1.2 Changing Operation Modes
4.1.3 What to Do When the Alarm Flashes / Sounds
4.2 Manual Override
5. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Troubleshooting
6. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Model Information 6.2 Product Specifications

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1. Introduction
The MHP series valve actuators designed and manufactured by RPM Tech Co., Ltd., are
powerful all-in-one hydraulic actuators with built-in hydraulics, control, and communication
functions. The hydraulic generator is composed of a motor and a hydraulic pump, with a
manual hydraulic pump installed for emergency operations.
MHP series products can be used for quarter-turn and linear valves and is designed for a
wide range of valve applications. This product can be installed in various locations, and its
main functions, like valve positioning and proportional control, can be access and controlled
remotely in groups of multiple MHP series products. The MHP series is also capable of
separate installment of the hydraulic cylinder and the control module, which can prove
advantageous in tight spaces.
The MHPWS-QNN series can generate an output torque of 600 Nm to 32,000 Nm
depending on the configuration of the hydraulic cylinder and oil pressure settings. This series
of products can be installed directly on most valves without a gear reducer.
Another notable feature of the MHP series is that even if a large load is applied to the valve,
the torque will automatically adjust up to the maximum torque (maximum pressure of the
hydraulic cylinder), which eliminates the need for a torque switch.
All electronic control parts are waterproof and explosion proof. The MHPWS-QNN can be
operated manually, locally, and remotely (via remote relay contact methods and also via 4-
20mA current control signals). This product is compatible with the PROFIBUS industrial
control network system and can be implemented as a Slave in the PROFIBUS network.
The MHPWS-QNN generates hydraulic pressure through the motor and the hydraulic pump
to operate the hydraulic cylinder to its maximum capacity. The controller receives real-time
information on the valve’s position from the potentiometer and executes valve positioning
commands at the highest precision. In addition, this product features a manually operated
hydraulic pump that can be used in emergencies such as a power failure.
All of our products support both local and remote operation as standard. We also
manufacture other products that are equipped with more advanced features that allow the
speed to vary precisely at different phases of the open and close movement.

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1.1 MHPWS-QNN Parts
①
Power Pack (MHPWS)
②
Hand Pump
③
Position Meter
④
Hydraulic Quarter Turn Cylinder
①
②
Figure 1.1 [MHPWS-QNN Parts]
③
④

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1.2 Identification
Each product component (MHPWS-QNN, Position meter) has a Nameplate in the following location:
Figure 1.2 [MHPWS-QNN Nameplate Location]
1) Identification data on the MHPWS-QNN nameplate
Figure 1.3 [MHPWS-QNN Nameplate]
1
MODEL
Model number of the MHPWS-QNN
2
INPUT RATING
Power input compatibility
3
S / N
Serial number
4
DATE
Date manufactured
5
OUTPUT
Maximum output torque
6
WEIGHT
Product weight
①
-
MHPWS-QNN
②-
Position Meter
①
②

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2) Identification data on the Position meter nameplate
Figure 1.3 [Position meter Nameplate]
1
MODEL
Model number of the Waterproof Position Meter
2
S / N
Manufacture number
3
DATE
Date manufactured
4
POWER
Input power
5
OUTPUT
Output signal
MODEL
DATE
OUTPUT
S / N
POWER
POSITIONMETER
0-20mA 4-20mA
0-5V
DATA
1-5V 0-10V 2-10V
O/E D/C
K-079581
DC-12V 0.2A
RE-01
2011. 01. 01
www.rpmtech.co.kr
√

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2. Safety
2.1 User Safety
User(s) of this product must read this manual thoroughly before installation and comprehend all of
the functions that this product is equipped with. Any tampering or dismantling of the product should be
avoided.
2.2 Mechanical and Electrical Safety
Please supply power to the product according to the details specified on the
nameplate of the product. The body of the MHP series is constructed with aluminum.
Consult the manufacturer for additional inquiries regarding the product.
2.3 Transport
Please consider the following precautions when transporting the product.
■ Unused cable sockets should be sealed using a plug before shipping
■ Make sure the needle valve at the top of the hand pump is locked during transport to
prevent malfunction or damage.
■ Do not attach a hoist or rope to the hand pump to prevent damage.
■ Avoid exposing the display to strong impacts.
2.4 Storage
It is best to store this product indoors. However, if storing it indoors for a long term is not possible,
place the product elevated from the ground and avoid direct sunlight using a cover.
Consider the following precautions if the product will be stored for more than 6 months.
■ Before Storing
Check for any paint damage and prepare appropriate measures for such damages.
■ During and After Storage
Make frequent checks for any paint damage. Conduct appropriate tests before
operating after a prolonged period.
WARNING

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2.5 Packaging
Packaging is environmentally friendly making it easy to disassemble and recycle. Packaging material
consists of wood, cardboard, and paper. We recommend recycling if possible, and advise proper
disposal of the materials in a designated place to prevent detrimental impact on the environment.
2.6 Installation Precautions
Upon delivery of the MHP Series product, the user should commence a thorough inspection of the
product(s) for damage, loose or missing screws. The packaging material should be recycled or disposed
of properly to prevent environmental contamination.
■ Ensure that the product being installed is the correct model by checking the
nameplate.
■ Check for any exterior defects or damages.
■ Check for any signs of leakage.
■ Ensure that the valve shaft is clean before installation.
■ Ensure that the appropriate connection parts are prepared before installation.
■ Make sure that the valve is in the FULL CLOSE state before installation.
■ Placing the MHP hydraulic pump (on the right) in the vertical upper position during
the installation may hinder it from operating at maximum torque output.
WARNING

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3. Installation
3.1 Valve Alignment
3.1.1 Shaft Coupling Connection
In the case where the valve shaft of the MHPWS-QNN does not align with the shaft connection,
manufacture a shaft coupling and connect before installing the actuator. Ensure that the key and the
shaft coupling does not inflict any damage.
The shaft coupling and the valve shaft must be completely aligned when
assembling.
3.1.2 Flange Adapter Connection
After connecting the shaft coupling, mount the manufactured flange adapter on to the valve flange.
Align the bolt holes on the valve flange and the flange adapter before screwing, and then screw the
flange adapter and the valve flange using the appropriate bolts and nuts.
3.2 MHPWS-QNN Mounting
Ensure that the valve being mounted is in the Full Close position. Note that the MHPWS-QNN is set to
the Full Close position at the time of delivery. Upon confirming that both the valve and the MHPWS-
QNN is set to the Full Close position, install the actuator in any of the 4 directions of the key. When the
connection is complete, use appropriate bolts to join the valve flange (or flange adapter) with the
MHPWS-QNN.
Ensure that the pump is not facing up during and after installation.
CAUTION
Key
Valve shaft
Adapter hole
CAUTION
flange
Figure 3.1 [MHPWS-QNN shaft connection area]

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Figure 3.3 [LOCAL SWITCH]
Exterior Grounding
Figure 3.2 [Grounding connection position]
3.3 Connecting Power and Signal Cables
1) Make sure a single-phase 110V ~ 220V AC power cable is
connected, and then open the terminal cover of the MHPWS.
2) Connect the power cable to terminals 1 and 2 on the terminal
block to ground the cable.
4SQ is recommended for the grounding cable.
Refer to the table below for specifications on the external cables.
4) Turn on the power of the MHPWS.
5) Place the SELECT switch on the front of the MHPWS into
SET position.
6) Ensure that the installation is successful by testing the
OPEN/CLOSE buttons function properly.
7) Turn off the power for the MHPWS-QNN and refer to the (Doc.No: E-MHPWS-***-CAN-EN) to
make wiring connections to the terminals.
8) Ensure that the cable gland and any flexible parts are all waterproof and IP68 rated. Seal any
unused cable sockets using plugs and close the terminal covers when the connection is complete.
Be sure to use IP68 rated waterproof cable glands.
The cable socket type and specifications are shown in the table below.
Signal
Analog signal
contact signal
Power
Wire specifications
1.5SQ (shield)
1.5SQ
2.5SQ
Position (signal)
Upper Sides
Bottom left
Bottom center
Bottom right
Signal
Gate positioner
Analog signal
Contact signal
Power
Inlet specification (PF)
1/2
3/4
1
3/4
Inlet Specifications (CTG)
16
22
28
22
Figure 3.4 [CABLE GLAND
& PLUG]
CAUTION
NOTE

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Open and adjust CAP
Hexagonal wrench required
3.4 Position Setting
3.4.1 Stroke Limiter Setting
- Full Close Stroke Limiter Setting –
1) Set the selector switch on the MHPWS-QNN to SET MODE as shown in Figure 3.5 and press the
CLOSE button to ensure that the valve is fully closed.
The main controller will not perform the close operation if the gate positioner is in
the full close limit state. Disable the gate positioner limit function or utilize the
gate calibration setting mode to perform the close operation.
2) If the valve does not fully close even after pressing the CLOSE button on the MHPWS-QNN, open
the MHPWS-QNN valve slightly, then loosen the plug cap on the closing side of the hydraulic
cylinder as shown in Figure 3.6, and turn the stroke limiter counterclockwise.
The Full Close Stroke Limiter setting can be adjusted by 1/4 turns per step using
a hexagonal wrench. Please be aware that turning too much may unlock the limit,
causing leakage of the hydraulic oil.
Model
01
02
03
04
05
06
07
Plug Cap
24
30
36
41
41
55
65
Stroke Limiter
4
6
8
10
10
17
19
* In case of Plug Cap, it is recommended to use a Monkey Spanner due to thick paint.
3) After adjusting the stroke limiter, close the valve on the MHPWS-QNN and ensure its full close
status. If the valve is still not fully closed, repeat procedure 2.
NOTE
(mm)
Figure 3.5 [Full Close Setting]
Figure 3.6 [F/C Stroke Limiter]
CAUTION
CLOSE
OPEN
LOCAL
SET
REMOTE

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- Full Open Stroke Limiter Setting -
1) Set the selector switch on the MHPWS-QNN to SET MODE as shown in Figure 3.7 and press the
OPEN button to ensure that the valve is fully open.
The main controller will not perform the close operation if the gate positioner is in
the full close limit state. Disable the gate positioner limit function or utilize the
gate calibration setting mode to perform the open operation.
2) If the valve does not fully open even after pressing the OPEN button on the MHPWS-QNN, close
the MHPWS-QNN valve slightly, then loosen the plug cap on the opening side of the hydraulic
cylinder as shown in Figure 3.8, and turn the stroke limiter counterclockwise.
The Full Open Stroke Limiter setting can be adjusted by 1/4 turns per step using
a hexagonal wrench. Please be aware that turning too much may unlock the limit,
causing leakage of the hydraulic oil.
Model
01
02
03
04
05
06
07
Plug Cap
24
30
36
41
41
55
65
Stroke Limiter
4
6
8
10
10
17
19
* In case of Plug Cap, it is recommended to use a Monkey Spanner due to thick paint.
3) After adjusting the stroke limiter, open the valve on the MHPWS-QNN and ensure its full open
status. If the valve is still not fully open, repeat procedure 2.
NOTE
CAUTION
(mm)
Open and adjust CAP
Hexagonal wrench required
Figure 3.7 [Full Open Setting]
Figure 3.8 [F/O Stroke Limiter]
CLOSE
OPEN
LOCAL
SET
REMOTE

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3.4.2 Testing for Proper Functioning
Upon installment of the MHPWS-QNN, perform the Full Close / Full Open operations to ensure proper
functioning of the valve’s disk. Check that the F/O and F/C indication lights next to the display and the
position meter are functioning properly according to the signals sent by the gate positioner.
Refer to Figure 3.9 below for visuals of a successful test case for proper functioning
after installment.
Figure 3.9 [Checking Normal Operation Status]
■ OPEN in
operation
■ CLOSE in
operation
■ Full OPEN status
■ Full CLOSE status
OPEN
CLOSE
CLOSE
OPEN
NOTE
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM

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3.4.3 OPEN/CLOSE Calibration Function
The MHPWS-QNN opening and closing calibration can be performed using the front switch, and the
procedure is as follows.
1) Set the SELECT switch to Local Mode.
2) Press and hold the CAL button for about 3 seconds until the display shifts to Calibration settings.
3) Press the CAL button once more to move into the Calibration settings and start the calibration
process.
4) Refer to Figure 3.12 for the functions of the buttons within the Calibration settings.
5) Press the ‘STOP’ button to end the calibration process and exit the menu.
MHPWS will automatically return to Normal Operation Mode after 1 minute of idle
time.
Figure 3.10 [Select Switch-Local Three Mode)]
Figure 3.11 [Switch to Calibration Mode]
NOTE
■ OPEN, CLOSE: Used to move through menu or option items
■ CAL: Used to select menu or option item
■ STOP: Used to move to previous menu or cancel
Figure 3.12 [Description of Button Function during Calibration]
3 sec
<Normal operation mode>
<Enter calibration mode>
<Start setting>
LOCAL
SET
REMOTE
CAL
CAL
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
STOP
OPEN
CLOSE
STOP
CAL
LOCAL
SET
REMOTE
Back to top Query,
ITEM scroll
Go to upper menu,
Exit mode
Query down,
ITEM scroll
Save selection,
Enter setting mode

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3.4.4 FULL CLOSE Calibration Instructions
1) Press the OPEN/CLOSE buttons to move to the Calibration menu item ('1 MANUAL F/C').
2) Press the CAL button to select the ‘1 MANUAL F/C’ menu. The valve position displayed on the
screen indicates the uncalibrated position.
3) Press the OPEN and CLOSE buttons to move the actuator to the desired position, and press the
CAL button to set the current position as the FULL CLOSE position.
4) Press STOP to return to Local Operation mode.
Follow the same procedure for FULL OPEN Calibration.
Figure 3.13 [Calibration Example-1]
Figure 3.14 [Calibration Example-2]
NOTE
Position selection
<Switch to operation mode as soon as calibration is completed>
CLOSE
OPEN
CLOSE
OPEN
CAL
CAL
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM

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3.4.5 Precautions During Calibration
1) The valve position displayed during calibration is based on factory calibrated settings of the position
meter (potentiometer). The valve position displayed after the calibration is the newly calibrated
position.
2) The user can only enter calibration value that is greater/less than 10% of the valve position to
prevent any errors during the calibration process.
▶ During the FULL CLOSE calibration the desired calibration
value should have a difference of ±10% from the FULL OPEN
position. Figure 3.15 shows the MHPWS-QNN displaying an
error message because the FULL CLOSE calibration value
entered (31.6%) does not have a difference of 10% or more.
The calibration process does not happen.
▶ During the FULL OPEN calibration the desired calibration
value should have a difference of ±10% from the FULL
CLOSE position. Figure 3.15 shows the MHPWS-QNN
displaying an error message because the FULL OPEN
calibration value entered (31.6%) does not have a difference
of 10% or more. The calibration process does not happen.
3) After completing FULL OPEN/FULL CLOSE calibration, recheck for normal operation.
Figure 3.16 [Exceeding initial calibration warning during FULL OPEN calibration]
Figure 3.15 [Exceeding initial calibration warning during FULL CLOSE calibration]
setting]
FULL OPEN Setting calibration:
40%
FULL CLOSE Setting calibration: 31%
Figure 3.17 [Normal operation]
OPEN
CLOSE
CLOSE
OPEN
■ OPENING Process
■ Full OPEN status
■ CLOSING Process
■ Full CLOSE status
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM

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4. Operation
4.1 Normal Operations Check / Inspection
4.1.1 Normal Operation
1) Turn on the power and check the version.
2) Test and ensure that full / partial opening and closing of the valve functions properly.
Figure 4.1 [Normal Power & Status Display]
Figure 4.2 [Normal OPEN & CLOSE Display]
■ OPEN operation
■ CLOSE operation
■ Full OPEN status
■ Full CLOSE status
OPEN
CLOSE
CLOSE
OPEN
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
MHP_Q_EN10___V2.0
EN10 : Model & Card Kind&Accuracy
2.0 : Program Version

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LOCAL
SET
REMOTE
F/O
F/C
R/S
ALM
4.1.2 Changing Operation Modes
Use the Select switch to alternate between the 3 modes of operation. LOCAL Mode is for local
manual operation. SET Mode is for accessing the function settings and is mostly used during the
initial setup of the MHPWS-QNN. REMOTE Mode allows the MHPWS-QNN to be monitored and
operated remotely.
1) LOCAL operation mode
- One press of the OPEN/CLOSE buttons would execute the commands accordingly
- Pressing the STOP button will stop the ongoing operation
- Pressing the CAL button for more than 3 seconds will enter the OPEN/CLOSE
Calibration Mode.
- Automatically stops when valve is fully closed (F/C) or fully Open (F/O).
è Local Normal Mode
- OPEN/CLOSE at constant speed
- Available in all E, G, K, M, S, I models.
- Default mode in Local Mode
è Local Speed Control Mode
- Speed control mode divides the OPEN/CLOSE movement
into three sections. The speed and time for each section is
configurable.
- Available in the K and S models only.
- Select this mode in PARAMETER settings.
è Local Step Control Mode
- Operable in two sections one of which operates in
incremental steps (1%).
- Available in the I model only.
- Select this mode in PARAMETER settings.
2) SET operation mode
- Operates only when the OPEN/CLOSE button is pressed
- Press the CAL button for more than 3 seconds to enter the
PARAMETER Settings Mode.
- Automatically stops when the valve is fully closed or open
è Local Setting Mode
- OPEN/CLOSE at constant speed
- Available in all E, G, K, M, S, I models.
- Default mode in Local Mode
Figure 4.4 [Each mode of SET MODE Display]
Figure 4.3 [Each Mode of LOCAL MODE Display]
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
LOCAL
SET
REMOTE

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3) REMOTE Operation Mode
- Used for operating remotely
- Mode selectable by two inputs on the control input
terminal.
(* Refer to Remote Control Instruction Manual)
- Limited by model and card types.
è Remote Normal Mode
- OPEN/CLOSE at constant speed.
- Available in all E, G, K, M, S, I models.
è Remote Speed Control Mode
- Speed control mode divides the OPEN/CLOSE
movement into three sections. The speed and time
for each section is configurable.
- Available in the K and S models only.
è Remote Normal AI Control Mode
- Calibration control mode uses a 4 ~ 20mA current
signal
- Operates at normal speed. ‘SIGNAL LOW’
appears when input signals are less than 3mA.
- Available in the M, S models only.
è Remote Step Control Mode
- Operable in two sections one of which operates in
incremental steps (1%).
- Available in the I model only.
è Remote Step AI Control Mode
- A combination of both the Calibration Control Mode
and the Step Control Mode.
- Available in the I model only
è Communication Mode(Profibus interface)
- Communication interface mode and displays will differ
slightly depending on the interface.
- Displays Address and Network Speed
- Available in the G, K, M, S, I models only
Figure 4.5 [Each Mode of REMOTE MODE Display]
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
LOCAL
SET
REMOTE
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM
F/O
F/C
R/S
ALM