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EAR70

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: 

+81(6)6659-8510  E-mail: [email protected]

EM-4885  P. 1 / 8

SERVO-TOP VALVE ACTUATOR TYPE E

(rotary type)

MODEL

EAR70

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:

Servo-Top type E.. ......................................................... (1)

 

MODEL NO.

Confirm that the model number described on the product is 
exactly what you ordered.

 

INSTRUCTION MANUAL

This manual describes necessary points of caution when 
you use this product, including installation, connection and 
basic maintenance procedures.

 

SAFETY PRECAUTIONS

Before using this product, read this manual carefully to 
handle the product correctly.  Gain a thorough understand-
ing of this product and all of the instructions and precau-
tions relating to safety before you start using it.  Make sure 
that the end users read this manual and then keep the 
manual in a safe place for future reference.

 

WARNING

:  Indicates that incorrect handling may cause 

hazardous conditions, resulting in death or severe injury.

 

CAUTION

:  Indicates that incorrect handling may cause 

hazardous conditions, resulting in injury or property damage.

 WARNING

• Shut off the all external power supply before wiring to the 

terminals. Failure to do so may result in electric shock or 
electric leakage.

• Ground the provided earth screw (M4) on the upper left of 

the terminal box.  Failure to do so may result in operation 
failure due to damage of printed wiring boards.

• DO NOT open the body cover for the product after instal-

lation.  Failure to do so may result in electric shock.

• The cover is secured with drop-proof screws.  DO NOT 

remove screws by force.  Doing so can cause damage to the 
product and result in electric shock.

• The enclosure is made of aluminium die-cast.  DO NOT 

drop the product on your feet or fingers.  Doing so may 
cause injury.

• DO NOT install the product where it is exposed to di-

rect sunlight or rain.  Doing so may cause failure, electric 
shock or electric leakage due to dew condensation.

• A fuse is installed on the top side of the control PWB in-

side the unit for safety.  It is 250 V/2 A slow blow type.  A 
spare fuse is secured on the base plate inside the product 
with adhesive tape.  Shut off the power supply before re-
placing the fuse.  Failure to do so may result in electric 
shock.

• DO NOT step onto the actuator.  DO NOT rest a heavy 

object on or against it.  It could cause injury.

• When installing the EAR70 outdoor or where it is exposed 

to rain or water drops, adequate precaution must be done 
for preventing water from entering inside through wiring 
conduits.  It could cause electric shock.

• Be sure that the power supply is removed.  Hand or arm 

could be caught and cause injury.

 CAUTION

DO NOT disassemble or repair the product.  There are 
many machined parts such as gears.  Doing so may cause 
injury of fingers.

POINTS OF CAUTION

 

CONFORMITY WITH LOW VOLTAGE DIRECTIVE

• This equipment is suitable for Pollution Degree 2 and  In-

stallation Category II (transient voltage 2500V).  Rein-
forced insulation (Power to I/O: 300V, Power to metallic 
housing: 300V) is maintained.  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.

 

POWER INPUT RATING & OPERATIONAL RANGE

Locate the power input rating marked on the product and 
confirm its operational range as indicated below:

100 V AC ±10

%

 (50/60 Hz)

200 V AC ±10

%

 (50/60 Hz)

 

GENERAL PRECAUTIONS

• Remove the power supply to the actuator before wiring to 

it.

• DO NOT install control signal wires and power sup-

ply wires together in one duct and wire from one duct 
because it may cause a malfunction or failure of printed 
wiring boards. 
For control signal wires, separate from power supply 
wires and use shielded cables.  This measure reduces the 
cause of a malfunction or failure.

 

ENVIRONMENT

• Indoor or outdoor, keep away from direct sunlight.
• Operating temperature -10 to +60°C (14 to 140°F)
• Operating humidity 30 to 90

%

 RH (non-condensing)

• Observe at least 200 mm (7.9 in.) of open space at the top 

of its body cover, if there is a possibility to exchange the 
actuator.

Summary of Contents for EAR70

Page 1: ...hock or electric leakage due to dew condensation A fuse is installed on the top side of the control PWB in side the unit for safety It is 250 V 2 A slow blow type A spare fuse is secured on the base p...

Page 2: ...necting surface is high temperature or its radiated heat is high If the temperature of the unit rises by a heat con ducted or radiated from external it may cause a failure ENVIRONMENT The unit does n...

Page 3: ...12 sq Manual Operation Stem 8 sq Control PWB Terminal BOX Cover Screw Earth Symbol Earth Screw 2 G3 4 Conduit Port 2 G1 2 Conduit Port Motor Capacitor Plate Specifications POWER VOLTAGE INPUT OUTPUT F...

Page 4: ...operation stem cannot be operated Shape of the manual operation stem is 8 mm square Use an adequate wrench Moving the output stem to the direction of full open turn the manual operation stem to the r...

Page 5: ...atically judges the abnormally low input if the input signal is suddenly fallen to the lower of the set value from 20 mA position or middle position SELECTABLE BY ORDERING INFROMATION POSITION OF SW1...

Page 6: ...T STEM Viewing from indicator OUTPUT SW 4 mA DC Open 90 Turn Counter Clockwise OPEN O 4 mA DC 1 2 3 4 ON 20 mA DC Shut 0 Trun Clockwise SHUT S 20 mA DC VOLTAGE INPUT CCW INPUT POSITION OF OUTPUT STEM...

Page 7: ...of full open position Operation direction of output stem differs according to the rotation direction of each adjuster as following 20mA DC input full open 90 SPAN approx 5 approx 4 SPAN ZERO ZERO max...

Page 8: ...stallation during operation tactile No deterioration and changes of the packing and O ring between the mechanism and the cover and on the inner surface of the lid of the BOX visual NO NECESSARY CHECKI...

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