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Page 3
HF-3135-5
OPERATING MANUAL
DC Propeller Fan Low-speed Alarm
MDA Series
Introduction
Before using the fan
Only qualified personnel should work with the product.
Use the product correctly after thoroughly reading the section
“Safety precautions.”
The product described in this manual has been designed and
manufactured for use in general industrial machinery, and must not
be used for any other purpose. For the power supply use a DC
power supply with reinforced insulation on its primary and
secondary sides. Oriental Motor Co., Ltd. is not responsible for any
damage caused through failure to observe this warning.
Standard · CE Marking
The product is recognized by UL and certified by CSA, and bears
the CE Marking (EMC Directives) in compliance with the EN
Standards.
● Standards
Standards Certification body
UL 507
CSA C22.2 No.113
● Installation conditions (For EN/IEC Standards)
Overvoltage category I, Pollution degree 2, Class III equipment
● Applicable standards
EMI EN 55011 Group 1, Class A
EMS EN 61000-6-2
Hazardous substances
RoHS (Directive 2002/95/EC 27Jan.2003) compliant
Safety precautions
The precautions described below are intended to prevent danger or
injury to the user and other personnel through safe, correct use of
the product. Use the product only after carefully reading and fully
understanding these instructions.
Handling the product without observing the instructions that
accompany a “Warning” symbol may result in serious injury or
death.
• Do not use the product in explosive or corrosive environments, in
the presence of flammable gases, locations subjected to
splashing water, or near combustibles. Doing so may result in fire
or injury.
• Assign qualified personnel the task of installing, wiring,
operating/controlling, inspecting and troubleshooting the product.
Failure to do so may result in fire or injury.
• Shut off the power to the fan in the event the lock-protection
circuit is activated. Otherwise, the fan will start unexpectedly
when released from the locked condition, causing bodily injury or
equipment damage.
• Install the fan in an enclosure in order to prevent injury.
• Keep the input-power voltage within the specified range to avoid
fire.
• Connect the cables securely according to the wiring diagram in
order to prevent fire.
• Do not forcibly bend, pull or pinch the cable. Doing so may fire.
UL
Warning
Thank you for purchasing an Oriental Motor product.
This Operating Manual describes product handling procedures and
safety precautions.
• Please read it thoroughly to ensure safe operation.
• Always keep the manual where it is readily available.
• For the power supply use a DC power supply with reinforced
insulation on its primary and secondary sides. Failure to do so
may result in electric shock.
• Turn off the power in the event of a power failure, or the fan will
suddenly start when the power is restored and may cause injury
or damage to equipment.
• Do not disassemble or modify the fan. This may cause injury.
Refer all such internal inspections and repairs to the branch or
sales office from which you purchased the product.
Caution
Handling the product without observing the instructions that
accompany a “Caution” symbol may result in injury or property
damage.
• Do not use the fan beyond its specifications, or injury or damage
to equipment may result.
• Keep your fingers and objects out of the openings in the fan. This
may cause injury.
• Do not hold the rotating parts (blades) of the fan or lead wire. This
may cause injury.
• Keep the area around the fan free of combustible materials in
order to prevent fire or a skin burn(s).
• To prevent the risk of damage to equipment, leave nothing
around the fan that would obstruct ventilation.
• Provide anti-static measures before installing the fan. Failure to
do so may result in equipment damage.
• Do not touch the rotating parts (blades) when the fan is in
operation. This may cause injury. The use of the optional
fingerguard is recommended to ensure protection.
Wegen der Verletzungsgefahr dürfen die Lüfterflügel bei
Ventilatorbetrieb nicht berührt werden. Der Gebrauch des als
Sonderzubehör erhältlichen Fingerschutzes ist empfehlenswert,
um erhöhte Sicherheit zu ewährleisten.
• Immediately when trouble has occurred, stop running and turn off
the power. Failure to do so may result in fire or injury.
• To dispose of the fan, disassemble it into parts and components
as much as possible and dispose of individual parts/components
as industrial waste.
Preparation
Verify that the items listed below are included. Report any missing
or damaged items to the branch or sales office from which you
purchased the product.
• Fan .................................................................... 1 pc.
• Cable with connector ......................................... 1 pc.
The fan is designed and manufactured for installation in equipment.
Install it in a well-ventilated location that provides easy access for
inspection. The location must also satisfy the following conditions:
• Inside an enclosure that is installed indoors (provide vent holes)
• Operating ambient temperature
−10 to +60 °C (+14 to +140 °F) (non-freezing)
• Operating ambient humidity 85% or less (non-condensing)
Page 4
r
• Area that is free of explosive atmosphere or toxic gas (such as
sulfuric gas) or liquid
• Area not exposed to direct sun
• Area free of excessive amount of dust, iron particles or the like
• Area not subject to splashing water (rains, water droplets), oil (oil
droplets) or other liquids
• Area not subject to continuous vibration or excessive shocks
• Area free of radioactive materials, magnetic fields or vacuum
• Area free of excessive electromagnetic noise (from welders,
power machinery, etc.)
When using near a switching circuit or high-frequency power
supply, the induced current may flow inside the fan due to
electromagnetic noise (conductive noise, radiative noise). If the
induced current flows, the electric corrosion is caused in the
bearings of the fan. As a result, it may generate the noise or
shorten the service life of the products. Use the fan in the
environment that the electromagnetic noise does not cause.
How to install the fan
Install the fan onto an appropriate flat metal plate having excellent
vibration resistance and heat conductivity. See the panel cut-out,
mounting-hall reference drawing for information on how to provide
mounting holes on the equipment used and secure the fan with
screws. For air orientation and rotational direction, see the
indications shown on the fan’s side frame.
MDA625 M3 0.4 N·m (3.5 lb-in)
Other MDA series M4 0.6 N·m (5.3 lb-in)
Connect the red wire to the
positive (+) power supply and
the black wire to the ground
connection.
Check the voltage specification
on the product identification plate and input the correct voltage. Use
a DC power supply having a rise time of 100 ms or less.
Connection and specifications of the alarm
Red
Black
Yellow
+DC powe
supply
GND
Alarm output
• MDA1225 type
The yellow wire is lead wire for
the alarm circuit. Connect
these wires to the client’s
circuit as shown in the figure.
Alarm activation speed
2100±400 r/min or less
Note
The low-speed alarm type of fan is equipped with an
Yellow
Black
Fan
internal delayed-start alarm circuit. The alarm function
becomes effective within 10 seconds of the fan start.
15 mA
or less
30 VDC or less
Client's circuit
• MDA1451 type
The yellow wire is lead wire for
the alarm circuit. GND is
common to the sensor and
power supply. Connect these
wires to the client’s circuit as
shown in the figure.
Alarm activation speed
1800±400 r/min or less
Note
The low-speed alarm type of fan is equipped with an
Yellow
Black
Fan
internal delayed-start alarm circuit. The alarm function
becomes effective within 10 seconds of the fan start.
Overheat protection
The fan is equipped with an internal protective circuit against
overheating. In the event a lock-up condition is detected, this
function automatically controls the current flow to the fan motor’s
windings, thus preventing the fan blades from locking and burning
out. The fan resumes operation automatically as soon as it is
released from the locked condition. Be sure to shut off the power to
the fan before performing an inspection.
15 mA
or less
30 VDC or less
Client's circuit
Low-speed alarm, electronic alarm type
Output mode Output condition
Open collector output
Normal operation: L level
Alarm output: H level
• MDA625 type, MDA825 type, MDA925 type
The yellow wire is lead wire for
the alarm circuit. Connect this
wire to the client’s as shown in
the figure.
Model Alarm activation speed
MDA625, MDA825 2300±400 r/min or less
MDA925 1900±400 r/min or less
Note
The low-speed alarm type of fan is not equipped with a
Yellow
Black
Fan
delayed trip-point alarm circuit. Therefore, an external
delay function is necessary to avoid the detection of fan
start. The set time of the delay function should be at least
10 seconds.
15 mA
or less
GND
30 VDC or less
0 V
Client's circuit
• Unauthorized reproduction or copying of all or part of this
manual is prohibited.
• Characteristics, specifications and dimensions are subject to
change without notice.
• and are registered trademarks or
trademarks of Oriental Motor Co., Ltd., in Japan and other