MODEL: MSP5
Final Control Elements
MINI-TOP ELECTRONIC ACTUATOR
(linear type)
Functions & Features
• Small-size control valve actuator
• Electrical positioner incorporated
• 1/1000 high resolution
• Seal-spring incorporated for both directions; usable with
three-way valves
• Easy adjustment: electronic limiter at the valve open &
closed positions
• Overload protection
• Various power inputs
• CE marking available for 24 V DC power
Typical Applications
• Actuator for automatic control valve in pilotplants
• Air-conditioning in buildings or plants
• Micro-flow control for pharmaceutical injection
• For small-size control valves
MODEL: MSP5–[1][2][3][4][5]–[6][7][8]
ORDERING INFORMATION
• Code number: MSP5-[1][2][3][4][5]-[6][7][8]
Specify a code from below for each [1] through [8].
(e.g. MSP5-371LT-ACR)
• Special input range (for codes Z and 0)
[1] STROKE
1: 5 to 10 mm (.20” to .39”)
3: 10 to 20 mm (.39” to .79”)
[2] OPERATION TIME, THRUST
3: 5 sec. / 10 mm, 150 N
4: 9 sec. / 10 mm, 300 N
7: 18 sec. / 10 mm, 700 N
[3] OUTPUT STEM TYPE
6: M6 female thread, 0.75 pitch
8: M8 female thread, 1.0 pitch
1: M10 female thread, 1.25 pitch
D: M6 female thread, 1.0 pitch
E: M8 female thread, 1.25 pitch
F: M10 female thread, 1.5 pitch
[4] SEQUENTIAL CONTROL SIGNALS
L: Full-open/-closed signal
F: Forced open/close signal
B: Full-open/-closed and forced open/close signals
(Select 'With Terminal Box.')
0: Without
[5] TERMINAL BOX
T: With
0: Without
[6] INPUT
Current
A: 4 – 20 mA DC (Input resistance 250 Ω)
Z: Specify current (See INPUT SPECIFICATIONS)
Voltage
6: 1 – 5 V DC (Input resistance approx. 1 MΩ)
0: Specify voltage (See INPUT SPECIFICATIONS)
[7] CE MARKING
C: With
0: Without
[8] POWER INPUT
AC Power
K3: 100 – 120 V AC
(Operational voltage range 90 – 132 V, 47 – 66 Hz)
(Not selectable for CE)
L3: 200 – 240 V AC
(Operational voltage range 180 – 264 V, 47 – 66 Hz)
(Not selectable for CE)
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
GENERAL SPECIFICATIONS
Degree of protection: IP55
Action: Direct or reverse; field selectable with DIP switches
(factory set to “reverse”)
(In “reverse” action, the output stem is retracted with an
input signal increase.)
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MODEL: MSP5
Operation at abnormally low input: Extend, retract or stop;
field selectable with DIP switches (factory set to “extend”)
Detectable input drop level: -16 ±2.5 %
Electrical connection
•No terminal box
Wiring conduit: G 1/2 female; cable connector with 1 meter
wire (0.5 mm
2
) provided
•Terminal box
Wiring conduit: G 1/2 female (two)
Terminal screws: M3 pillar terminal
(Sequential control signal suffix code B)
M3 chromated steel
(other terminal box types)
(torque 0.5 N·m)
Housing material: Diecast aluminium
Drive: Stepping motor
Position detection: Potentiometer
Deadband: 0.1 – 4.5 % adjustable (factory set to 1.5 %)
Restarting timer: 0 – 10 sec. adjustable
(factory set to 1.5 sec.)
Isolation: AC power to signal
Zero adjustment: 0 – 25 %
Span adjustment: 50 - 100 %
Protective functions: Overload protection
Power indicator: Green LED turns on with power supplied.
Input indicator: Green LED turns on with normal input
Status indicator LED: Red light blinks in 2 sec. intervals in
normal operations; blinks in 0.5 sec. intervals when a
foreign object is detected mechanically caught inside.
Manual operation: Not available
INPUT SPECIFICATIONS
• DC Current: Input resistor incorporated (250 Ω)
• DC Voltage: 1 – 5 V DC or specific range within 0 – 5 V DC,
minimum span 1 V
(For a current input, convert the current to a voltage with
250 Ω)
Input resistance: Approx. 1 MΩ
• Forced open/close signal: Dry contact inputs to command
to retract and extend
Rating: 5 V DC @ 2.5 mA
OUTPUT SPECIFICATIONS
• Operation Time & Thrust (at rated power voltage)
(Model: Operation Time: Thrust)
MSP5-x3: 5 sec. / 10 mm: 150 N (33.5 lbs)
MSP5-x4: 9 sec. / 10 mm: 300 N (67 lbs)
MSP5-x7: 18 sec. / 10 mm: 700 N (157 lbs)
• Position Output: 1 – 5 V DC (not isolated)
With “direct” action, 5 – 1 V DC position output is provided
proportionally to 4 – 20 mA DC (1 – 5 V DC) input.
Load resistance: ≥ 5 kΩ
• Full-open / -closed signals: Limit switch contact
Rating: 125 V AC @ 0.75 A (cos ø = 1)
30 V DC @ 0.6 A (resistive load)
Mechanical life: 3 × 10
7
cycles
Maximum operation frequency: 60 cycles/min.
INSTALLATION
Power Consumption
•AC power input: Approx. 25 VA
•DC power input: Approx. 0.6 A
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 85 %RH (non-condensing)
Vibration: 0.5 G max.
Mounting position: All directions
Do not mount the actuator with its output stem or cable
connector on the upside if the actuator is to be exposed to
dripping water.
Weight
•DC powered: 1.2 kg (2.65 lbs)
•AC powered: 1.4 kg (3.09 lbs)
Add 0.7 kg (1.54 lbs) for the terminal box.
PERFORMANCE
Resolution: 1/1000 or 0.015 mm, whichever is greater, with
0.1 % deadband setting
Insulation resistance
•AC powered: ≥ 100 MΩ with 500 V DC
(signal or metallic housing to power)
≥ 100 MΩ with 100 V DC
(signal to metallic housing)
•DC powered: ≥ 100 MΩ with 100 V DC
(signal or power to metallic housing)
Dielectric strength
•AC powered: 1500 V AC @ 1 minute
(signal or metallic housing to power)
100 V AC @ 1 minute
(signal to metallic housing)
•DC powered: 100 V AC @ 1 minute
(signal or power to metallic housing)
STANDARDS & APPROVALS
CE conformity:
EMC Directive (2004/108/EC)
EMI EN 61000-6-4: 2007
EMS EN 61000-6-2: 2005
Low Voltage Directive (2006/95/EC)
EN 61010-1: 2001
Measurement Category II
Pollution Degree 2
Full-open/-closed signal to other, power or metallic
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MODEL: MSP5
housing: Reinforced insulation (125 V)
TERMINOLOGY
• Overload (Lock) Protection
The Mini-Top Series is equipped with a protection circuit
against overload caused by for example the valve catching
an alien substance.
When an overload is detected, the Mini-Top stops supplying
power to the motor and the status LED blinks in 0.5 sec.
intervals.
The protection is reset automatically with applying opposite-
direction input signal or turning the power off and
restarting.
• Restarting Timer
The Mini-Top Series is equipped with a timer circuit which
gives an interval period (0 – 10 seconds) between stop-
restart actions to prevent the motor and other internal
components from overheating.
It is recommended to set a long restarting time when the
ambient temperature and/or the temperature of flow
material is high.
• Electronic Limiter
This model is equipped with electronic limiters in order to
prevent mechanical locks when the input goes below 0 % or
above 100 %.
Limiters are set at approx. -1.5 % for the full-closed side,
approx. 101.5 % for the full-open side.
• Seal-Spring
The Mini-top Series incorporates a seal-spring to maintain
the sealing pressure when the valve is fully closed. The
standard spring has 0.5 – 1 mm (.02” – .04”) flexibility to
facilitate the full-closed adjustment.
TERMINAL CONNECTIONS
black (1)
+ (U)
– (V)
+
COM1
+
COM2 COM1
white (2)
red (3)
green (4)
yellow (5)
blue (6)
gray (7)
brown (8)
(1) to (8): Terminal No. of terminal box.
Full-open/-closed signals and forced open/close signals are optional.
POWER
INPUT
POSITION OUTPUT (1 – 5V DC)
FULL-OPEN or
FULL-CLOSED
SIGNAL
(
output stem
)
retracted
(
output stem
)
extended
+ (U)
– (V)
+
COM1
+
COM2
POWER
INPUT
POSITION OUTPUT (1 – 5V DC)
FULL-OPEN or
FULL-CLOSED
SIGNAL
(
output stem
)
retracted
(
output stem
)
extended
COM1
FORCED
OPEN/CLOSE
SIGNAL
FORCED
OPEN/
CLOSE
SIGNAL
(
output stem
)
retract
(
output stem
)
extend
(
output stem
)
retract
(
output stem
)
extend
1
3
2
4
6
5
7
8
11
9
10
• With Both Full-open/closed Signal
and Forced Open/Close Signal
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MODEL: MSP5
DIMENSIONS unit: mm (inch)
42 (1.65) 43 (1.69) 22 (.87)
CABLE CONNECTOR
w/1 meter (3.28 ft) LEADWIRE
20 (.79)
90 (3.54)
[130 (5.12)]
141 (5.55) [181 (7.13)]50
*
(1.97) max.
98 (3.86)
46 (1.81) dia.
4–M5 10 (.39) deep
31 (1.22)2 (.08)
36 –0.1 dia.
0
66 (2.60) dia.
M
(See the table to the right)
YOKE CONNECTION
[ ] for AC power supply
*
40 (1.57)
max. with 5 – 10 mm stroke
YOKE SURFACE
OUTPUT STEM HOLE SIZE M
CODE DIA. PITCH DEPTH
6 M 6 0.75
8 M 8 1.0
1 M10 1.25 15
D M 6 1.0
E M 8 1.25
F M10 1.5
42 (1.65) 43 (1.69)
67 (2.64)85 (3.35)
34 (1.34)
141 (5.55) [181 (7.13)]
90 (3.54) [130 (5.12)] 98 (3.86)
50
*
(1.97) max.
46 (1.81) dia.
4–M5 10 (.39) deep
31 (1.22)
2 (.08)
36 –0.1 dia.
0
66 (2.60) dia.
M
(See the table to the right)
YOKE CONNECTION
[ ] for AC power supply
*
40 (1.57)
max. with 5 – 10 mm stroke
YOKE SURFACE
20 (.79)
60 (2.36)
35 (1.38)
7.5 (.30)
2–G 1/2 CONDUIT
32.5 (1.28)
Cable connector or leadwires not provided with terminal box.
■ TERMINAL BOX TYPE
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MODEL: MSP5
SCHEMATIC CIRCUITRY
Hi / Lo
Limiter
Motor Control
Logic
Motor
Driver
Position
Detector
RESTART
TIMER
DEADBAND
ADJ.
Switching
Regulator
+
COM1
+ (U)
– (V)
Power
Circuit
SZ
Position
Output
+
Input
Circuit
INPUT
4 – 20mA DC
(1 – 5V DC)
COM1
FORCED
OPEN/
CLOSE
SIGNAL
COM2
FULL-OPEN
or
FULL-CLOSED
SIGNAL
POSITION
OUTPUT
1 – 5V DC
POWER
MODE
SELECTOR
POWER
INPUT STATUS
POT
MOTOR
LIMIT
SW
Full-open/-closed signals and forced open/close signals a
re optional.
Disregard the switching regulator circuit for DC power input.
Specifications are subject to change without notice.
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MSP4 / MSP5 / MSP6
P. 1 / 7EM-4854 Rev.8
MINI-TOP ELECTRONIC ACTUATOR
(linear type)
MODEL
MSP4/MSP5
/MSP6
INSTRUCTION MANUAL
BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■ PACKAGE INCLUDES:
Mini-T
op
........................................................................ (1)
2.5 mm Hexagon key wrench (with option /S) ............ (1)
The Mini-Top is not provided with a yoke or other compo-
nents required for mounting it to a valve. They are to be
provided by the user.
■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
POINTS OF CAUTION
■ CONFORMITY WITH EC DIRECTIVES
• This equipment is suitable for use in a Pollution Degree
2 environment and in Measurement Category II, with the
maximum switching voltage of 125V. (Applicable to the
full-open/-closed signal only)
Prior to
installation, check that the insulation class of this
unit satisfies the system requirements.
• Altitude up to 2000 meters
•
The equipment must be installed such that appropriate
clearance and creepage distances are maintained to con-
form to CE requirements. Failure to observe these re-
quirements may invalidate the CE conformance.
•
Install
lightning surge protectors for those wires con-
nected to remote location. Refer to “LIGHTNING SURGE
PROTECTION” section below.
■ POWER INPUT RATING & OPERATIONAL RANGE
•
Locate
the power input rating marked on the product and
confirm its operational range as indicated below:
Rating 100 – 120V AC: 90 – 132V, 47 – 66 Hz, approx. 25VA
Rating 200 – 240V AC: 180 – 264V, 47 – 66 Hz, approx. 25VA
Rating 24V DC: 24V ±10%, approx. 0.6A
• A fuse of the following rating is incorporated: 250V/1A
time delay.
• A
rush current 1.5 times as high as the above ratings can
flow at the startup.
■ GENERAL PRECAUTIONS
• R
emove the power supply to the actuator before wiring to it.
■ INSTALLATION
• Indoor
, or outdoor where the MSP is NOT exposed to di-
rect sunlight
• Ambient temperature:
-5 to +55°C (23 to 131°F)
• Operating humidity 30 to 85% RH (non-condensing)
• Vibration: 0.5 G max.
• Install the MSP where you can reach for maintenance.
Observe at the minimum of 15 centimeters (6 inches)
above the cover.
■ OUTDOOR USE
• When
installing the MSP outdoor or where it is exposed to
rain or water drops, be sure to fasten the cable connector
tightly and leave a slack of the cable.
• Do
not mount the MSP in such direction that the output
stem or cable connector is at the top of the MSP unit.
■ ELECTRICAL CONNECTION
•
W
ith DC power type unit, power supply and signal lines
are not isolated. Use an isolator if needed.
• When
you use a cable other than the standard 1-meter
cable equipped with non-terminal box type unit and its
extension distance is longer than that, use shielded cables
for signal line, or install signal cables in a separate piping
from power supply cables.
■ LIGHTNING SURGE PROTECTION
•
In
order to protect the unit from lightning surges entering
through cables, use of appropriate lightning surge protec-
tors are recommended. For 24V DC power supply line,
choose a surge protector with its maximum surge voltage
40V or less between lines. Recommended M-System mod-
el: MDP-D24.
■ PID CONTROLLER
•
Choose
PID parameters carefully so that the MV remains
as stable as possible. Unstable operations shorten the life
of actuator and valve.
■ O-RING, GASKET
•
When
replacing the actuator cover after adjustments,
check that the O-ring is securely placed in the groove.
• When
replacing the terminal box cover, check that the
gasket is in place.
■ YOKE DESIGN
•
When
a foreign object is caught in the valve, a thrust 2
times greater than the maximum rating could be gener-
ated. Leave enough strength for mechanical components
such like the yoke and stem.
• If
the MSP is used on a steam line in temperature control,
it is possible that the MSP’s temperature rises higher than
the ambient temperature due to transmission or radiation
via the steam piping, even when the ambient temperature
is within allowable range.
Use
a
longer yoke to increase heat dissipation and apply
insulating material.
■ AND ....
•
DO
NOT loosen the screw fixing the potentiometer stem.
Loosening it could cause a malfunction.
• DO
NOT step onto the actuator. DO NOT rest a heavy
object on or against it.
Cable Connector
DO NOT Pull Tightly
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MSP4 / MSP5 / MSP6
P. 2 / 7EM-4854 Rev.8
PROTECTIVE FUNCTIONS
■ OVERLOAD (LOCK) PROTECTION
The MSP is equipped with a protection circuit against
overload cause by for example valve catching an alien sub-
stance.
When an overload is detected, the MSP stops supplying
power to the motor and the status LED flashes in 0.5 sec.
intervals.
The protection is reset automatically with applying oppo-
site-direction input signal or turning power off and restart-
ing.
A foreign object caught in the valve, inappropriate adjust-
ments, ground screw of the valve tightened too much, etc.
are some of the causes of overload. Check these parts and
remove the cause of trouble for ensuring proper life of the
actuator.
■ FUSE
A fuse is equipped for protection against overload current.
When you turn the power supply on, check that the power
LED is on. If it is off, check that the fuse is melted. Replace
it with a new one.
If the new fuse is melted again soon after it has been re-
placed, there may be problems with the control PCB or the
motor. Contact M-System or sales representative.
■ RE-STARTING TIMER
The MSP is equipped with a timer circuit which gives an
interval period (0 – 10 sec.) between stop-restart actions
to prevent the motor and other internal components from
overheating.
It is recommended to set a long restarting time when the
ambient temperature and/or the temperature of flow mate-
rial is high.
COMPONENT IDENTIFICATION
Power Input PCB
(for AC power)
Insulation Barrier
Control PCB
Motor
Position Sensor
O-Ring
Cable Connector
Cable
Nut
Seal Spring
Screw
Output Stem
Cable
Cable Connector
Nut
Screw
Seal Spring
Output Stem
Motor
Power Input PCB (for AC power)
Potentiometer
Control PCB
Gasket
Figure 1. MSP4 & MSP5 Component Identication Figure 2. MSP6 Component Identication
Remark: Construction of the MSP4 is partly different from
the above figure.
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MSP4 / MSP5 / MSP6
P. 3 / 7EM-4854 Rev.8
OFF
1
2
3
4
ON
PWR INP ALM
DLY
ZERO SPAN DZ
Insulation Barrier
Fuse
Connector
SW1
ZERO
SPAN
DZ
DLY
SW1
PWR
INP
ALM
: Zero Adjustment
: Span Adjustment
: Deadband Adjustment
: Restarting Timer
: Direct/Reverse Actions,
Operation at Abnormally Low Input
: Power Indicator (green with power supplied)
: Input Indicator (green with input applied)
: Status Indicator (red flashes in 2 sec. intervals,
flashes in 0.5 sec. intervals with mechanical lock detected)
Remark: Turning adjustment potentiom-
eters and switches with a torque exceed-
ing their tolerance may destroy their
stoppers.
Turn them carefully and stop where they
hit the stoppers. Be careful especially
with Re-starting timer adjustment.
Figure 3. MSP Control PCB Identication
OUTPUT SPAN ADJUSTABILITY
The servo-control circuit compares and amplifies input sig-
nal (setpoint) and feedback signal from a potentiometer, and
drives the motor to such direction to minimize difference of
the two signals.
0
25 50 75 100
25
50
75
100
0
INPUT SIGNAL (%)
STEM POSITION (%)
Span Counterclockwise
Zero Clockwise
Zero Counterclockwise
Span Clockwise
Adjustable Zero Range
Adjustable Span Range
Figure 4. I/O Characteristics (Adjustable Range)
Table 1. Available Stroke Range for Each Model
MODEL L MIN. STROKE MAX. STROKE
MSP4-1
29 5 10
MSP4-2 34 8 15
MSP5-1 40 5 10
MSP5-3 50 10 20
MSP6-3 58 10 20
MSP6-4 78 20 40
Figure 5. Minimum & Maximum Stroke
Maximum Stroke
Minimum
Stroke
L
Yoke Surface
MANUAL OPERATION FUNCTION
(for MSP4 AC power supply)
1) Be sure to turn OFF the power voltage. It may result in
electrical shock or system breakdown, if operating while
the power applied.
2) Remove the cap on the cover top using a 22 mm wrenc
h.
3) Insert the attached hexagon key wrench in the manual
drive shaft as shown in figure.
4) The
wrench turning direction differs according to the
model.
MODEL STROKE/ROTATION
[mm/turns]
TURNING DIRECTION
LOOKING FROM TOP
COVER
MSP4-x3 1/27 CCW/EXTEND
MSP4-x4 1/54 CCW/RETRACT
MSP4-x7 1/112 CCW/EXTEND
5) Tighten
the cap on the cover with 4 to 6 N·m torque.
Turning the torque in excess may damage the screw
thread of the cap.
Note: The manual operation function is not available for
24V DC power model.
Cap
Hexagon key wrench
O ring
Cover
Drive shaft
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MSP4 / MSP5 / MSP6
P. 4 / 7EM-4854 Rev.8
INSTALLATION
The following is a general procedure for mounting the MSP
to a valve with a yoke and coupling.
Be sure NOT TO CHANGE factory adjusted setting of the
MSP.
Remove power supply during the procedure unless other-
wise specified.
1)
Supply
power to the MSP and apply 0% input (100% for
direct action). Turn the output stem fully clockwise (seen
from the cover).
2) Turn
the valve stem to fully closed position (fully clock-
wise).
3) Set the yoke to the MSP
.
4) Set the coupling to the valve stem and fit the MSP out-
put stem into the coupling. Then fix the yoke and valve
temporarily.
5) F
ix the coupling so that there is no eccentricity between
both stems.
6) F
ix the yoke and valve firmly after checking the eccen-
tricity of both stems again.
7) Attac
h the position indicator if required.
WIRING CONNECTION
Refer to the following diagram when wiring. If an optional terminal box is provided, remove its cover and connect lead-
wires.
MSPx
Bolts (M5)
Position Indicator
Yoke
Lock Nut
Output Stem
Valve Stem
Valve Bonnet
Adjust distance.
Figure 6. Example of the MSP Mounted to a Valve
Remark 1: The yellow wire must be left unconnected if the position output signal is not required. Cut the exposed section of
copper wire and insulate the tip of the wire.
Remark 2: The MSP6 is not provided with full-open/-closed signals.
black (1)
+ (U)
– (V)
+
COM1
+
COM2 COM1
white (2)
red (3)
green (4)
yellow (5)
blue (6)
gray (7)
brown (8)
(1) to (8): Terminal No. of terminal box.
Full-open/-closed signals and forced open/close signals are optional.
POWER
INPUT
POSITION OUTPUT (1 – 5V DC)
FULL-OPEN or
FULL-CLOSED
SIGNAL
(
output stem
)
retracted
(
output stem
)
extended
+ (U)
– (V)
+
COM1
+
COM2
POWER
INPUT
POSITION OUTPUT (1 – 5V DC)
FULL-OPEN or
FULL-CLOSED
SIGNAL
(
output stem
)
retracted
(
output stem
)
extended
COM1
FORCED
OPEN/CLOSE
SIGNAL
FORCED
OPEN/
CLOSE
SIGNAL
(
output stem
)
retract
(
output stem
)
extend
(
output stem
)
retract
(
output stem
)
extend
1
3
2
4
6
5
7
8
11
9
10
• With Both Full-open/closed Signal
and Forced Open/Close Signal
Figure 7. Wiring Diagram
3.2 min. 4.5 max.
3.2 min.
5.9 max.
10
■ WIRING INSTRUCTIONS FOR TERMINAL BOX OPTION
• Other Terminal Box Type• Sequential Control Signal Suffix Code B
Applicable wire size 1.25 mm
2
Remove insulation by 10 mm.
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MSP4 / MSP5 / MSP6
P. 5 / 7EM-4854 Rev.8
ADJUSTMENT PROCEDURE
■ ADJUSTMENT PROCEDURE
A) Zero and Span
• Apply 0% [100%] input. Turn the zero adjustment for the
fully extended position (valve stem fully retracted) or ad-
just the connecting section of the valve stem.
Adjust the
output stem, referring to Table 4, to provide an
adequate sealing spring if necessary.
• W
ith 100% [0%] input, turn the span adjustment until the
MSP reaches required fully retracted position (valve stem
fully extended).
For
three-way valves, the sealing pressure can be adjusted
to be applied in the direction where the output stem is
fully retracted*
2
. Adjustment procedure is the same for
zero.
• W
ith 0% [100%] input again, check that the MSP is at
the fully extended position. If the position is shifted, go
through the above procedure again.
Remark 1: There is only minimal effect of span adjustment
to zero point, thus the stem position shifts very little at the
extended side when the span potentiometer is turned.
Remark 2: With the stroke narrower, hunting (the motor
repeats changing direction) can happen more often. Adjust
Deadband in such cases.
*2. The sealing spring for the MSP4 is provided only for the
direction where the output stem is retracted.
Table 2. Switching Actions
ACTION SW1-3 EXPLANATIONS*
1
Direct ON Output stem is retracted with an
input decrease.
(Valve stem extended)
Reverse OFF Output stem is extended with an
input decrease.
(Valve stem retracted)
Table 3. Operations at Abnormally Low Input
OPERATION SW1-1
SW1-2
Stop *
1
ON
Extend OFF OFF
Retract ON OFF
*1.
Whatever setting for SW1-1 is disregarded for Stop mode.
Open the cover and adjust ZERO, SPAN, DZ (deadband),
DLY (re-starting timer) potentiometers and the direct/re-
verse SW on the control PCB as shown in Figure 3.
Other adjustments which are paint locked are for factory
use only and should be changed only by qualified M-System
personnel. M-System is not liable for any malfunction or
inconvenience caused by unauthorized change of them by
the user.
■ DIRECT/REVERSE ACTION
The actuator action is factory set to “Reverse” (the output
stem is retracted, with an input signal increase.), and the
operation at abnormality to “Extend.” For changing the set-
ting, use the DIP SW on the control PCB. Refer to Tables
2 and 3.
Remark 1: SW1-4 is not used.
Remark 2: With the direct action, the position output is 5
– 1V DC proportional to the input 0 – 100%.
■ GENERAL
After installing the valve and actuator, go to adjustments in
order of zero, span, seal-spring and sensitivity (deadband).
If optional limit switches are provided, adjust them at the
last.
The following explanation applies to reverse action For di-
rect action, read the value in the brackets [ ].
Remark: Applying an over-torque to the adjustments may
destroy stoppers or other sections of them. Use a small-
sized screwdriver and be sure to stop turning as soon as
they hit the stoppers.
Seal-Spring Division
Output Stem
Figure 8. Seal-Spring
Table 4. Spring Contraction
SPRING SEALING CONTACT*
MODEL CONTRACTION PRESSURE PRESSURE
(mm) (N / lbs) (N / lbs)
MSP4-x3 0.5 147 / 33 98 / 22
MSP4-x4 1.0 300 / 67 250 / 56
MSP4-x7 1.0 686 / 154 294 / 66
MSP5-x3 0.5 150 / 34 110 / 25
MSP5-x4 1.0 294 / 66 216 / 49
MSP5-x7 1.0 686 / 154 294 / 66
MSP6-x3 1.0 588 / 132 441 / 99
MSP6-x4 1.0 1170 / 263 882 / 198
MSP6-x6 1.5 2350 / 529 1170 / 263
*The minimum pressure required to contract the spring.
Remark: Graduations by 1 millimeter increments are
marked on the stem. For example, with MSP4-x7, the seal-
ing pressure reaches approx. 490 N at 0.5 mm, 686 N at 1
mm.
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SEN
TRONIC
AG
MSP4 / MSP5 / MSP6
P. 6 / 7EM-4854 Rev.8
B) Sensitivity (Deadband)
When the motor repeats small inverting movements with-
out stopping still for small input changes, widen the dead-
band by turning the DZ adjustment clockwise.
C) Limit Switches (optional)
Loosen
the screws and adjust positions of the dogs. See Fig-
ure 9.
This adjustment cannot be done in an intermediate position
of the valve. Set it at the fully open or closed position.
Limit Switches
Dog (full-opened position)
Screws
Dog (full-closed position)
Potentiometer
MAINTENANCE
For effective use and longer life of the MSP, regular checking appropriate for its operating conditions are recommended. Refer
to the following table.
ITEM CHECKING POINT HOW TO PROCEED
Functioning Apply input 0%, 50%, 100%, then back to 50%, 0%.
Check the actuator operations and positions at
each input value.
Repair or calibration
Abnormal sound No abnormal sound is heard during operation. Repair or calibration
Connector
Leadwire
The connector is firmly connected.
No breakdown of leadwires.
The insulation covers are not torn, not bruised.
Repair or calibration
Inside humidity, rust No condensation. No rust.
If there is water inside, check the packing.
Remove water, dry the case and inside parts.
Replace rusted parts. Calibration.
If the packing is damaged, replace it.
Screws Check that screws and bolts are securely fastened. Re-tighten them.
Nut Check that the nut at the valve stem is not loose. Re-tighten it and calibrate.
For repair or parts replacement, contact M-System or representatives.
■ LUBRICATION
There is no need of oiling the MSP in normal operating conditions.
■ REGULAR TEST RUNNING
If the valve is not frequently operated, run a test operation regularly (once a week, for example) to check proper functions.
Figure 9. Limit Switches
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SEN
TRONIC
AG
MSP4 / MSP5 / MSP6
TROUBLESHOOTING
TROUBLE
POWER
LED
INPUT
LED
STATUS
LED
POSSIBLE CAUSE HOW TO PROCEED
No
function
ON ON Flash
2 sec
Abnormal input signal.
(No change over deadband)
Check input signal.
Narrow the deadband.
ON ---- Flash
0.5 sec
Actuator mechanism is damaged. Repair
Overload cause by a foreign object caught
in the valve.
Check the valve.
Control PCB damaged. Repair or replace.
Wiring error at the motor or position sensor.
Check the connector.
Low power voltage or insufficient capacity. Check the power supply.
ON OFF Flash
2 sec
Abnormal input signal. Check the input signal.
Wiring error at the input signal.
Check the connector and connecting section.
OFF ---- ---- Wiring error at the power supply.
Check the connector and connecting section.
Abnormal power supply voltage. Check the power supply.
Fuse melted. Replace the fuse.
ON ---- ON Malfunction by noise. Turn off the power supply and restart.
Low power voltage or insufficient capacity. Check the power supply.
ON ---- OFF Malfunction by noise. Turn off the power supply and restart.
Low power voltage or insufficient capacity. Check the power supply.
Unstable functioning Power voltage is low or fluctuating. Check the power supply.
Unstable input signal. Check the controller, cables. Eliminate
noise.
Position sensor damaged. Replace the position sensor.
Stops in the middle of stroke
Slows down in the middle of
stroke
Actuator mechanism is damaged. Repair
Overload cause by a foreign object caught
in the valve.
Check the valve.
---- Regardless of LED state.
For repair or parts replacement, contact M-System or representatives.
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SEN
TRONIC
AG
/
