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MSP40 / MSP50

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201  Fax: +81(6)6659-8510  E-mail: info@m-system.co.jp

EM-4883    P. 8 / 18

9.  COMBINATION WITH VALVE

 

OPERATION DISTANCE WHEN COMBINED WITH VALVE

When setting the upper-stop position and the lower-stop position, it is preferable that the operation distance becomes 80% 
or less with respect to the maximum stroke of the actuator.
That is, when the valve is closed at the lower-end side of the actuator, if the maximum stroke is 20 mm and the lower-stop 
position is set at the 20.0 mm position, there will be no margin for the actuator to further go down to close the valve when 
valve leakage occurs.  In such a case, Auto-setup may not be successfully completed.
In order to avoid such a situation, select an appropriate combination of an actuator and a valve to secure an enough opera-
tion distance.  In the example below, the maximum stroke is 20 mm and thus the preferable operation distance is 16.0 mm. 
Set so that the distance between the upper-stop position and the lower-stop position are within the operation distance of 
16.0 mm.

 

EXAMPLE OF PROPER OPERATION DISTANCE

When connecting the output stem of the actuator with the valve stem, determine their mounting position so that a proper 
operation distance can be secured.

Max. Stroke: 20.0mm

16mm max.  (rough indication)

Upper Stop Position

Lower Stop Position

Valve seat surface (seating position)

Max. Spring contraction

when leakage occurs

Stop

Stop

set by Auto-setup

Spring contraction: approx. 0.1 mm

Upper-End of Max. Stroke

Lower-End of Max. Stroke

• Example of MSP Mounted to Valve

Actuator

Bolts (M5)

Position Indicator

Yoke

Output stem

Lock nut

Valve stem
Valve bonnet

Summary of Contents for MSP40

Page 1: ...BLE CONNECTIONS 6 7 OUTPUT STEM STROKES 7 8 SEAL SPRING CONTRACTION AND THRUST 7 9 COMBINATION WITH VALVE 8 10 AUTO SETUP MODE 9 11 PROGRAMMING UNIT MODEL PU 2x 12 12 MODBUS COMMUNICATION 13 13 PARAME...

Page 2: ...failure to observe the pre cautions could result in personal injury or damage to the property WARNING Remove power supply to the actuator before wiring to the unit It could cause electric shock Do not...

Page 3: ...to withstand all vibrations M System does not guarantee long term use of the unit even with small vibrations Please use the unit only after evaluating in an actual installation environment Par ticula...

Page 4: ...l Spring Stepping Motor Potentiometer Cover Nut Output stem Screw Figure 1 Component identification MSP40 MSP50 DA NC IN FE1 UPP UPP LOW LOW ALM ALM 24V GND COM OUT DB DG PWR UPPER LOWER INP STA COM A...

Page 5: ...h 20 mA DC input ON Direct Output stem goes DOWN with 20 mA DC input SW1 4 OFF Output stem moves while the manual operation button is pressed in Manual Operation mode ON Output stem moves inch by inch...

Page 6: ...retract UP extend DOWN alarm and or output signals as necessary Modbus communication allows operation without analog input and monitoring of the operation status of the unit DA DB DG IN COM OUT 24V GN...

Page 7: ...RACTION AND THRUST Thrust and Seal Spring Contraction MODEL RATED THRUST N THRUST WHEN VALVE IS SEATED N THRUST WHEN AUTO SEUP IS COMPLETE N AJUSTABLE MAX CONTRACTION MAX THRUST N MAX THRUST WHEN OUTP...

Page 8: ...void such a situation select an appropriate combination of an actuator and a valve to secure an enough opera tion distance In the example below the maximum stroke is 20 mm and thus the preferable oper...

Page 9: ...h back to Automatic Operation mode Note that the actuator immediately starts to operate in accordance with a value of input signal DO NOT touch the output stem and its vicinity as it may cause serious...

Page 10: ...ositions then stops to end Auto setup 4 Lower Upper seal springs MSP50 only 1 The output stem goes down until the valve contacts the seat surface Auto setup is interrupted if the valve reaches the low...

Page 11: ...newly set the upper end position To complete the fine adjustment Lower end side Turn SW1 5 from OFF to ON then to OFF again to newly set the lower end position Upper end side Turn SW1 6 from OFF to ON...

Page 12: ...e display of PU 2x comes on by power supplied to the actuator unit 3 To display a target item press ITEM then N N N represents numerical number 0 to 9 Alternatively use UP or DOWN button to shift to t...

Page 13: ...ven if the address is writable make sure to set Modbus Operation mode address 111 in advance to enable writing ADDRESS MAP Refer to 13 PARAMETER ITEMS COMMON TO MODBUS AND PU 2x for Modbus address map...

Page 14: ...04 Inp x R 18 I16 Position setpoint 1 5 0 to 105 0 05 Tar x R 19 I16 Position 1 5 0 to 105 0 06 Pos x R 1 The ratio to the operation distance i e a distance between the lower stop position and the up...

Page 15: ...times when the duty cycle per minute exceeded 50 1 Clear 0 1 0 26 AccumClr x R W 52 I16 Time ratio of respective positions 1 Clear 0 1 0 27 PosRClr x R W 53 I16 Clear all diagnostics 1 Clear 0 1 0 28...

Page 16: ...98 0 44 OpnSig x R W 136 I16 Extend DOWN signal position 5 0 to 25 0 2 0 45 ClsSig x R W 137 I16 Deadband 0 1 to 5 0 0 3 46 DBand x R W 138 I16 Restart limiting timer sec 0 0 to 30 0 1 5 47 Restart x...

Page 17: ...guration mode Stops Modbus input Monitor mode Stops Modbus input mode Follows Modbus input Address 101 Configuration mode Stops ON N A 2 Monitor mode 4 Moves by button operation 1 Configurable on PU 2...

Page 18: ...acement contact M System or our representatives LUBRICATION There is no need of oiling the Mini Top electronic actuator in normal operating conditions REGULAR TEST RUNNING If the valve is not frequent...

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